v3.24.3
Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Dec. 02, 2024
Entity Registrant Name dei_EntityRegistrantName TIDAL TRUST II
Entity Central Index Key dei_EntityCentralIndexKey 0001924868
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Dec. 02, 2024
Document Effective Date dei_DocumentEffectiveDate Dec. 02, 2024
Prospectus Date rr_ProspectusDate Dec. 02, 2024
YieldMax™ AI & Tech Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading YieldMax™ AI & Tech Portfolio Option Income ETF - FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s primary investment objective is to seek current income. The Fund’s secondary objective is to seek capital appreciation via investments in a select portfolio of AI and Technology Companies (defined below).

 

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

 

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses(1)  (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in total annual fund operating expenses or in the expense example above, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not yet available.

 

Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then hold or redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example does not take into account brokerage commissions that you may pay on your purchases and sales of Shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is an actively managed exchange-traded fund (“ETF”) that seeks income and capital appreciation. The Fund’s strategy involves: (1) constructing a portfolio of U.S.-listed equity securities of AI and Technology Companies (each, an “Underlying Security”) (the “Equity Strategy”) and (2) generating income through an options portfolio (the “Options Strategies”), which involve using options contracts on Underlying Securities and/or AI and Technology ETFs (described below). The Fund will also maintain a minor allocation to cash or U.S. Treasuries, not exceeding ten percent of its total assets.

 

Equity Strategy

 

The Fund’s investment sub-adviser, ZEGA Financial, LLC (“ZEGA” or the “Sub-Adviser”), selects the AI and Technology Companies in which the Fund will invest. AI and Technology Companies are companies involved in AI software, cloud infrastructure, AI semiconductors, network infrastructure, AI consulting services, software and IT services, technology hardware manufacturing and distribution, semiconductor production, interactive media, and diversified consumer services related to technology and entertainment. To enable the Fund to effectively implement its Options Strategies, ZEGA evaluates the liquidity of a potential company’s common stock and the liquidity of its options contracts. The Fund may invest in companies of any market capitalization size. ZEGA will also evaluate price level and implied volatility (i.e., a measure of how much the market believes the price of a stock or other underlying asset will move in the future) when selecting companies for investment and will monitor for these factors when determining whether to select new companies or remove existing companies from the portfolio.

 

AI and Technology Companies may include companies from foreign countries, including emerging markets. Underlying Securities may include depositary receipts, such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”). The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in securities of companies with principal business activities in the industry, if any, assigned to AI and Technology Companies.

 

The Fund’s equity portfolio will generally be comprised of between fifteen and thirty companies. Dividends, if any, paid by the Fund’s equity portfolio holdings will contribute to the Fund’s income generation. In addition, the Fund’s equity portfolio may provide capital appreciation. The Fund’s strategy may result in high portfolio turnover on an annual basis.

 

Options Strategies

 

The Fund seeks to generate income from engaging in the Options Strategies primarily using options contracts on some or all of its Underlying Securities. In particular, the Fund will receive income in the form of a premium when it writes (sells) an option. By selling options, the Fund will earn premiums from buyers who pay for the right to buy or sell the underlying asset at a predetermined price. The Sub-Adviser can implement the Options Strategies in various market conditions. Depending on the Sub-Adviser’s outlook, ZEGA will select one Options Strategy or a combination of Options Strategies that it believes will best provide the Fund with current income while generally also attempting to capture some upside appreciation (potential for increase in asset value). Additionally, the Sub-Adviser considers the performance of the underlying securities. In some instances, the aim is to generate additional gains if the underlying security increases in value, while, in other cases, the aim is to limit losses if the underlying security decreases in value. Further, depending on the Sub-Adviser’s assessment of one or more of the Underlying Securities’ options contracts (e.g., they are insufficiently liquid or too costly), the Fund may employ Options Strategies using options on an “AI and Technology ETF” (i.e., a passively-managed, U.S.-listed ETF that seeks to track the performance of an AI or Technology Index (described below)). The Fund’s use of Options Strategies with Underlying Securities or ETFs will always be covered (e.g., the Fund may do call or put spreads).

 

The Fund may be subject to different outcomes depending on the Options Strategies used. For example:

 

●When writing a covered call (selling a call option on security the Fund already owns), the Fund might limit its potential for capital appreciation in exchange for premium income, which also provides some downside protection should the Underlying Security decline in value.

●When selling a credit spread (writing a call option at one strike price and buying another call option at a higher strike price or writing a put option at one strike price and buying another put option at a lower strike price), the Fund might limit the potential loss compared to selling an option outright, by capping it at the difference between the strike prices minus the net premium received. In a best case scenario, the options expire worthless and the Fund retains the premium on the written option.

●When selling a diagonal call spread (selling a call option with a nearer expiration date and buying a call option with a later expiration date at a different strike price), the Fund might benefit from the time decay (i.e., the reduction in an option’s value as the time to its expiration date approaches) of the nearer-term option. An option’s decay accelerates as its expiration date gets closer because there is less time for an investor to earn a profit from that option; however, there is no guarantee that the written option will expire worthless.

●Using an Options Strategy such as cash-secured put selling (selling put options while holding enough cash to purchase the underlying security if assigned), the Fund can potentially buy securities at lower prices should the Underlying Security decline in value due to the premium received, or retain the premium if the Underlying Security remains the same or increases in value.

●When selling calendar call spreads (selling a short-term option and buying a longer-term option at the same strike price), the Fund might benefit from the faster time decay of the short-term option. However, if the written option is exercised, the loss is offset by the premium received as well as the increase in value of the longer-term option.

●When selling collars (selling a call option and buying a put option to protect against significant price movements), the Fund might be able to generate income from the premium received while limiting potential losses. In a best case scenario, the security’s share price falls below the put strike price, and the Fund gains the difference between the security’s share price and strike price. Otherwise, the Fund will experience losses that will be partially offset by the premium received on the written option.

 

These Options Strategies impact the risk-return profile of the Fund, potentially affecting volatility, income generation, upside capture (gain potential), and capital preservation (protecting value).

 

Additionally, the premiums the Fund receives from selling options are directly influenced by market volatility; higher volatility (larger price swings) typically results in higher premiums. Therefore, the Sub-Adviser analyzes market conditions to determine the timing and type of Options Strategies to employ to achieve the primary objective of current income. By strategically entering and exiting options positions, the Sub-Adviser seeks to enhance the Fund’s income potential.

 

Treasuries

 

In addition, the Fund will hold cash or short-term U.S. Treasury securities. These securities serve a dual purpose: providing collateral for the Options Strategies and contributing to the Fund’s income generation.

 

Why invest in the Fund?

 

  ● The Fund seeks to generate income, which is not dependent on the value of the Underlying Securities.

 

  ● The Fund seeks to participate in some of the potential gains experienced by increases in the share prices of the Underlying Securities.

 

The Fund is classified as “non-diversified” under the 1940 Act.

 

Under normal circumstances, the Fund will invest at least 80% of the value of its assets, plus borrowings for investment purposes, in the equity securities of AI and Technology Companies and in options contracts on AI and Technology Companies and on AI and Technology ETFs. For purposes of the foregoing, the Fund defines an “AI and Technology Company” as a company that derives 50% or more of its revenue in one or more of the following proprietary sectors: (i) AI software and/or generative AI software, (ii) cloud infrastructure services (e.g., services that provide infrastructure-as-a-service to support the training of AI models), (iii) AI semiconductors (e.g., designing and manufacturing of key semiconductors for AI applications), (iv) network infrastructure (e.g., development of servers, storage, and networking equipment relevant for training and running generative AI models), (v) AI services (e.g., consulting and implementation services for generative AI software), (vi) software and information technology services companies, (vii) manufacturers and distributors of technology hardware and equipment (e.g., communications equipment, cellular phones, computers and peripherals, electronic equipment and related instruments), (viii) semiconductors and semiconductor equipment, (ix) interactive media and services, and (x) diversified consumer services, broadline retail, and entertainment companies involved in the foregoing. The Fund defines an “AI and Technology ETF” as a passively managed U.S.-listed ETF that seeks to track the performance of an AI or Technology Index. Lastly, the Fund defines an “AI or Technology Index” as a benchmark that tracks the performance of a selection of stocks from companies operating in the artificial intelligence and/or technology sectors.

 

There is no guarantee that the Fund’s investment strategy will be properly implemented, and an investor may lose some or all of its investment.

 

Risk [Heading] rr_RiskHeading Principal Investment Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus. When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance. Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund. Updated performance information will be available on the Fund’s website at www.yieldmaxetfs.com.

 

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.yieldmaxetfs.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund.
YieldMax™ AI & Tech Portfolio Option Income ETF | Risk Lose Money [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
YieldMax™ AI & Tech Portfolio Option Income ETF | Artificial Intelligence Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Artificial Intelligence Risk. Issuers engaged in artificial intelligence typically have high research and capital expenditures and, as a result, their profitability can vary widely, if they are profitable at all. The space in which they are engaged is highly competitive and issuers’ products and services may become obsolete very quickly. These companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. The issuers are also subject to legal, regulatory and political changes that may have a large impact on their profitability. A failure in an issuer’s product or even questions about the safety of the product could be devastating to the issuer, especially if it is the marquee product of the issuer. It can be difficult to accurately capture what qualifies as an artificial intelligence company.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Technology Sector Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Technology Sector Risk. The Fund will invest substantially in companies in the information technology sector, and therefore the performance of the Fund could be negatively impacted by events affecting this sector. Market or economic factors impacting technology companies and companies that rely heavily on technological advances could have a significant effect on the value of the Fund’s investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Derivatives Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Derivatives Risk. Derivatives are financial instruments that derive value from the underlying reference asset or assets, such as stocks, bonds, or funds (including ETFs), interest rates or indexes. The Fund’s investments in derivatives may pose risks in addition to, and greater than, those associated with directly investing in securities or other ordinary investments, including risk related to the market, imperfect correlation with underlying investments or the Fund’s other portfolio holdings, higher price volatility, lack of availability, counterparty risk, liquidity, valuation and legal restrictions. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The use of derivatives may result in larger losses or smaller gains than directly investing in securities. When the Fund uses derivatives, there may be an imperfect correlation between the value of the Underlying Security and the derivative, which may prevent the Fund from achieving its investment objective. Because derivatives often require only a limited initial investment, the use of derivatives may expose the Fund to losses in excess of those amounts initially invested. In addition, the Fund’s investments in derivatives are subject to the following risks:

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Options Contracts [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Options Contracts. The use of options contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. For the Fund in particular, the value of the options contracts in which it invests are substantially influenced by the value of the Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. The Fund may also write call and put options, which includes the risk that the underlying instrument appreciates or depreciates sufficiently over the period to offset the net premium received by the Fund for the written option, resulting in a loss to the Fund. Additionally, to the extent the Fund maintains indirect exposure to an Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Counterparty Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in options contracts. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Distribution Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Distribution Risk. As part of the Fund’s investment objective to provide current income, the Fund seeks to provide monthly income distributions. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | NAV Erosion Risk Due to Distributions [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

NAV Erosion Risk Due to Distributions. When the Fund makes a distribution, the Fund’s NAV will typically drop by the amount of the distribution on the related ex-dividend date (i.e., the date by which you need to own a dividend-paying stock in order to receive the upcoming dividend payment). The repeated payment of distributions by the Fund, if any, may significantly erode the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Equity Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Equity Market Risk. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from specific issuers. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks, such as those held by the Fund, are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Concentration Risk. The Fund will be concentrated in securities of companies with principal business activities in the industry, if any, assigned to AI and Technology Companies. To the extent that the Fund concentrates in a group of industries, it will be subject to the risk that economic, political, or other conditions that have a negative effect on that group of industries will negatively impact them to a greater extent than if its assets were invested in a wider variety of industries.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | ETF Risks [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

ETF Risks.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as “Authorized Participants” or “APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Cash Redemption Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Costs of Buying or Selling Share [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Costs of Buying or Selling Shares. Buying or selling Shares involves certain costs, including brokerage commissions, other charges imposed by brokers, and bid-ask spreads. The bid-ask spread represents the difference between the price at which an investor is willing to buy Shares and the price at which an investor is willing to sell Shares. The spread varies over time based on the Shares’ trading volume and market liquidity. The spread is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Due to the costs of buying or selling Shares, frequent trading of Shares may reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Trading [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value. It may also be more difficult to enforce contractual or shareholder rights in emerging market countries, which could negatively impact the Fund’s investments.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and certain additional risks. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. The Fund may invest in unsponsored depositary receipts. The issuers of unsponsored depositary receipts are not obligated to disclose material information in the United States and, therefore, there may be less information available regarding such issuers and there may not be a correlation between such information and the value of the depositary receipts.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Foreign Currency Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Currency Risk. A Fund’s exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. Dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time for any number of reasons, including changes in interest rates and the imposition of currency controls or other political developments in the U.S. or abroad.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | General Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters or events, pandemic diseases, terrorism, regulatory events, and government controls.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | High Portfolio Turnover Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Inflation Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Capitalization Risk.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. Some small capitalization companies have limited product lines, markets, financial resources, and management personnel and tend to concentrate on fewer geographical markets relative to mid- and large-capitalization companies. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Market Events Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Events Risk. The Fund’s investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities and other financial instruments. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation (or expectations of inflation), deflation (or expectations of deflation), changes in the actual or perceived creditworthiness of issuers, general market liquidity, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. Conflict, loss of life and disaster connected to ongoing armed conflict between Ukraine and Russia in Europe and between Israel and Hamas in the Middle East could have severe adverse effects on the related region, including significant adverse effects on the regional or global economies and the markets for certain securities. The U.S. and the European Union have imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. These conflicts have contributed to recent market volatility and may continue to do so.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Money Market Instrument Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | New Fund Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

New Fund Risk. The Fund is a recently organized management investment company with no operating history. As a result, prospective investors do not have a track record or history on which to base their investment decisions.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Risk Nondiversified Status [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Operational Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund relies on third-parties for a range of services, including custody. Any delay or failure relating to engaging or maintaining such service providers may affect the Fund’s ability to meet its investment objective. Although the Fund, Adviser, and Sub-Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | Tax Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

U.S. Government and U.S. Agency Obligations Risk. The Fund may invest in securities issued by the U.S. government or its agencies or instrumentalities. U.S. Government obligations include securities issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, such as the U.S. Treasury. Payment of principal and interest on U.S. Government obligations may be backed by the full faith and credit of the United States or may be backed solely by the issuing or guaranteeing agency or instrumentality itself. In the latter case, the investor must look principally to the agency or instrumentality issuing or guaranteeing the obligation for ultimate repayment, which agency or instrumentality may be privately owned. There can be no assurance that the U.S. Government would provide financial support to its agencies or instrumentalities (including government-sponsored enterprises) where it is not obligated to do so.

 

YieldMax™ AI & Tech Portfolio Option Income ETF | YieldMax™ AI & Tech Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol GPTY
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.99% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [1]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [1],[2]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.99% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 315
YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF - FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s primary investment objective is to seek current income. The Fund’s secondary objective is to seek capital appreciation via investments in a select portfolio of Crypto Industry and Technology Companies (defined below).

 

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

 

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses(1)  (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in total annual fund operating expenses or in the expense example above, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not yet available.

 

Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then hold or redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example does not take into account brokerage commissions that you may pay on your purchases and sales of Shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is an actively managed exchange-traded fund (“ETF”) that seeks income and capital appreciation. The Fund’s strategy involves: (1) constructing a portfolio of U.S.-listed equity securities of Crypto Industry and Technology Companies (each, an “Underlying Security”) (the “Equity Strategy”) and (2) generating income through an options portfolio (the “Options Strategies”), which involve using options contracts on Underlying Securities and/or Crypto Industry and Technology ETFs (described below). The Fund will also maintain a minor allocation to cash or U.S. Treasuries, not exceeding ten percent of its total assets.

 

The Fund does not invest directly in any digital assets (like bitcoin). The Fund does not invest directly in derivatives that track the performance of any digital assets. The Fund does not invest in or seek direct exposure to the current “spot” or cash price of any digital assets. Investors seeking direct exposure to the price of a digital asset should consider an investment other than the Fund.

 

Equity Strategy

 

The Fund’s investment sub-adviser, ZEGA Financial, LLC (“ZEGA” or the “Sub-Adviser”), selects the Crypto Industry and Technology Companies in which the Fund will invest. Crypto Industry and Technology Companies are companies engaged in crypto asset mining, blockchain technology development, crypto asset trading platforms, digital wallet services, decentralized finance (DeFi) platforms, smart contract technology, crypto asset hardware manufacturing, blockchain-as-a-service (BaaS), NFT-related platforms and services, and diversified financial services, payment processing, and technology providers within the crypto industry. To enable the Fund to effectively implement its Options Strategies, ZEGA evaluates the liquidity of a potential company’s common stock and the liquidity of its options contracts. The Fund may invest in companies of any market capitalization size. ZEGA will also evaluate price level and implied volatility (i.e., a measure of how much the market believes the price of a stock or other underlying asset will move in the future) when selecting companies for investment and will monitor for these factors when determining whether to select new companies or remove existing companies from the portfolio.

 

Crypto Industry and Technology Companies may include companies from foreign countries, including emerging markets. Underlying Securities may include depositary receipts, such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”). The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in securities of companies with principal business activities in the industry, if any, assigned to Crypto Industry and Technology Companies.

 

The Fund’s equity portfolio will generally be comprised of between fifteen and thirty companies. Dividends, if any, paid by the Fund’s equity portfolio holdings will contribute to the Fund’s income generation. In addition, the Fund’s equity portfolio may provide capital appreciation. The Fund’s strategy may result in high portfolio turnover on an annual basis.

 

Options Strategies

 

The Fund seeks to generate income from engaging in the Options Strategies primarily using options contracts on some or all of its Underlying Securities. In particular, the Fund will receive income in the form of a premium when it writes (sells) an option. By selling options, the Fund will earn premiums from buyers who pay for the right to buy or sell the underlying asset at a predetermined price. The Sub-Adviser can implement the Options Strategies in various market conditions. Depending on the Sub-Adviser’s outlook, ZEGA will select one Options Strategy or a combination of Options Strategies that it believes will best provide the Fund with current income while generally also attempting to capture some upside appreciation (potential for increase in asset value). Additionally, the Sub-Adviser considers the performance of the underlying securities. In some instances, the aim is to generate additional gains if the underlying security increases in value, while, in other cases, the aim is to limit losses if the underlying security decreases in value. Further, depending on the Sub-Adviser’s assessment of one or more of the Underlying Securities’ options contracts (e.g., they are insufficiently liquid or too costly), the Fund may employ Options Strategies using options on an “Crypto Industry and Technology ETF” (i.e., a passively-managed, U.S.-listed ETF that seeks to track the performance of an Crypto Industry and Technology Index (described below)). The Fund’s use of Options Strategies with Underlying Securities or ETFs will always be covered (e.g., the Fund may do call or put spreads).

 

The Fund may be subject to different outcomes depending on the Options Strategies used. For example:

 

●When writing a covered call (selling a call option on security the Fund already owns), the Fund might limit its potential for capital appreciation in exchange for premium income, which also provides some downside protection should the Underlying Security decline in value.

●When selling a credit spread (writing a call option at one strike price and buying another call option at a higher strike price or writing a put option at one strike price and buying another put option at a lower strike price), the Fund might limit the potential loss compared to selling an option outright, by capping it at the difference between the strike prices minus the net premium received. In a best case scenario, the options expire worthless and the Fund retains the premium on the written option.

●When selling a diagonal call spread (selling a call option with a nearer expiration date and buying a call option with a later expiration date at a different strike price), the Fund might benefit from the time decay (i.e., the reduction in an option’s value as the time to its expiration date approaches) of the nearer-term option. An option’s decay accelerates as its expiration date gets closer because there is less time for an investor to earn a profit from that option; however, there is no guarantee that the written option will expire worthless.

●Using an Options Strategy such as cash-secured put selling (selling put options while holding enough cash to purchase the underlying security if assigned), the Fund can potentially buy securities at lower prices should the Underlying Security decline in value due to the premium received, or retain the premium if the Underlying Security remains the same or increases in value.

●When selling calendar call spreads (selling a short-term option and buying a longer-term option at the same strike price), the Fund might benefit from the faster time decay of the short-term option. However, if the written option is exercised, the loss is offset by the premium received as well as the increase in value of the longer-term option.

 

●When selling collars (selling a call option and buying a put option to protect against significant price movements), the Fund might be able to generate income from the premium received while limiting potential losses. In a best case scenario, the security’s share price falls below the put strike price, and the Fund gains the difference between the security’s share price and strike price. Otherwise, the Fund will experience losses that will be partially offset by the premium received on the written option.

 

These Options Strategies impact the risk-return profile of the Fund, potentially affecting volatility, income generation, upside capture (gain potential), and capital preservation (protecting value).

 

Additionally, the premiums the Fund receives from selling options are directly influenced by market volatility; higher volatility (larger price swings) typically results in higher premiums. Therefore, the Sub-Adviser analyzes market conditions to determine the timing and type of Options Strategies to employ to achieve the primary objective of current income. By strategically entering and exiting options positions, the Sub-Adviser seeks to enhance the Fund’s income potential.

 

Treasuries

 

In addition, the Fund will hold cash or short-term U.S. Treasury securities. These securities serve a dual purpose: providing collateral for the Options Strategies and contributing to the Fund’s income generation.

 

Why invest in the Fund?

 

  ● The Fund seeks to generate income, which is not dependent on the value of the Underlying Securities.

 

  ● The Fund seeks to participate in some of the potential gains experienced by increases in the share prices of the Underlying Securities.

 

The Fund is classified as “non-diversified” under the 1940 Act.

 

Under normal circumstances, the Fund will invest at least 80% of the value of its assets, plus borrowings for investment purposes, in the equity securities of Crypto Industry and Technology Companies and in options contracts on Crypto Industry and Technology Companies and on Crypto Industry and Technology ETFs. For purposes of the foregoing, the Fund defines a “Crypto Industry and Technology Company” as a company that derives 50% or more of its revenue in one or more of the following proprietary sectors: (i) crypto asset mining, (ii) blockchain technology development (e.g., companies providing infrastructure and tools for blockchain networks), (iii) crypto asset trading platforms, (iv) digital wallet providers, (v) decentralized finance (DeFi) platforms, (vi) companies involved in the development of smart contract technology, (vii) manufacturers and distributors of hardware related to crypto asset (e.g., mining rigs, hardware wallets, and other related equipment), (viii) companies providing blockchain-as-a-service (BaaS), (ix) interactive platforms and services related to NFTs (non-fungible tokens), and (x) diversified financial services, payment processing companies, and technology providers involved in the foregoing. The Fund defines an “Crypto Industry and Technology ETF” as a passively managed U.S.-listed ETF that seeks to track the performance of a Crypto Industry or Technology Index. Lastly, the Fund defines an “Crypto Industry or Technology Index” as a benchmark that tracks the performance of a selection of stocks from companies operating in the Crytpo Industry and/or technology sectors.

 

There is no guarantee that the Fund’s investment strategy will be properly implemented, and an investor may lose some or all of its investment.

 

Risk [Heading] rr_RiskHeading Principal Investment Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus. When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance. Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund. Updated performance information will be available on the Fund’s website at www.yieldmaxetfs.com.

 

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.yieldmaxetfs.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund.
YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Risk Lose Money [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Technology Sector Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Technology Sector Risk. The Fund will invest substantially in companies in the information technology sector, and therefore the performance of the Fund could be negatively impacted by events affecting this sector. Market or economic factors impacting technology companies and companies that rely heavily on technological advances could have a significant effect on the value of the Fund’s investments. The value of stocks of information technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Stocks of information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Derivatives Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Derivatives Risk. Derivatives are financial instruments that derive value from the underlying reference asset or assets, such as stocks, bonds, or funds (including ETFs), interest rates or indexes. The Fund’s investments in derivatives may pose risks in addition to, and greater than, those associated with directly investing in securities or other ordinary investments, including risk related to the market, imperfect correlation with underlying investments or the Fund’s other portfolio holdings, higher price volatility, lack of availability, counterparty risk, liquidity, valuation and legal restrictions. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The use of derivatives may result in larger losses or smaller gains than directly investing in securities. When the Fund uses derivatives, there may be an imperfect correlation between the value of the Underlying Security and the derivative, which may prevent the Fund from achieving its investment objective. Because derivatives often require only a limited initial investment, the use of derivatives may expose the Fund to losses in excess of those amounts initially invested. In addition, the Fund’s investments in derivatives are subject to the following risks:

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Options Contracts [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Options Contracts. The use of options contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. For the Fund in particular, the value of the options contracts in which it invests are substantially influenced by the value of the Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. The Fund may also write call and put options, which includes the risk that the underlying instrument appreciates or depreciates sufficiently over the period to offset the net premium received by the Fund for the written option, resulting in a loss to the Fund. Additionally, to the extent the Fund maintains indirect exposure to an Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Counterparty Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in options contracts. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Distribution Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Distribution Risk. As part of the Fund’s investment objective to provide current income, the Fund seeks to provide monthly income distributions. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | NAV Erosion Risk Due to Distributions [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

NAV Erosion Risk Due to Distributions. When the Fund makes a distribution, the Fund’s NAV will typically drop by the amount of the distribution on the related ex-dividend date (i.e., the date by which you need to own a dividend-paying stock in order to receive the upcoming dividend payment). The repeated payment of distributions by the Fund, if any, may significantly erode the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Equity Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Equity Market Risk. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from specific issuers. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks, such as those held by the Fund, are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Concentration Risk. The Fund will be concentrated in securities of companies with principal business activities in the industry, if any, assigned to Crypto Industry and Technology Companies. To the extent that the Fund concentrates in a group of industries, it will be subject to the risk that economic, political, or other conditions that have a negative effect on that group of industries will negatively impact them to a greater extent than if its assets were invested in a wider variety of industries.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | ETF Risks [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

ETF Risks.

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as “Authorized Participants” or “APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

 

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Cash Redemption Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Costs of Buying or Selling Share [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Costs of Buying or Selling Shares. Buying or selling Shares involves certain costs, including brokerage commissions, other charges imposed by brokers, and bid-ask spreads. The bid-ask spread represents the difference between the price at which an investor is willing to buy Shares and the price at which an investor is willing to sell Shares. The spread varies over time based on the Shares’ trading volume and market liquidity. The spread is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Due to the costs of buying or selling Shares, frequent trading of Shares may reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Trading [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value. It may also be more difficult to enforce contractual or shareholder rights in emerging market countries, which could negatively impact the Fund’s investments.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and certain additional risks. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. The Fund may invest in unsponsored depositary receipts. The issuers of unsponsored depositary receipts are not obligated to disclose material information in the United States and, therefore, there may be less information available regarding such issuers and there may not be a correlation between such information and the value of the depositary receipts.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Foreign Currency Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Currency Risk. A Fund’s exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. Dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time for any number of reasons, including changes in interest rates and the imposition of currency controls or other political developments in the U.S. or abroad.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | General Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters or events, pandemic diseases, terrorism, regulatory events, and government controls.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | High Portfolio Turnover Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Inflation Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Capitalization Risk.

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. Some small capitalization companies have limited product lines, markets, financial resources, and management personnel and tend to concentrate on fewer geographical markets relative to mid- and large-capitalization companies. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Market Events Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Events Risk. The Fund’s investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities and other financial instruments. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation (or expectations of inflation), deflation (or expectations of deflation), changes in the actual or perceived creditworthiness of issuers, general market liquidity, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. Conflict, loss of life and disaster connected to ongoing armed conflict between Ukraine and Russia in Europe and between Israel and Hamas in the Middle East could have severe adverse effects on the related region, including significant adverse effects on the regional or global economies and the markets for certain securities. The U.S. and the European Union have imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. These conflicts have contributed to recent market volatility and may continue to do so.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Money Market Instrument Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | New Fund Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

New Fund Risk. The Fund is a recently organized management investment company with no operating history. As a result, prospective investors do not have a track record or history on which to base their investment decisions.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Risk Nondiversified Status [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Operational Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund relies on third-parties for a range of services, including custody. Any delay or failure relating to engaging or maintaining such service providers may affect the Fund’s ability to meet its investment objective. Although the Fund, Adviser, and Sub-Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Tax Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

U.S. Government and U.S. Agency Obligations Risk. The Fund may invest in securities issued by the U.S. government or its agencies or instrumentalities. U.S. Government obligations include securities issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, such as the U.S. Treasury. Payment of principal and interest on U.S. Government obligations may be backed by the full faith and credit of the United States or may be backed solely by the issuing or guaranteeing agency or instrumentality itself. In the latter case, the investor must look principally to the agency or instrumentality issuing or guaranteeing the obligation for ultimate repayment, which agency or instrumentality may be privately owned. There can be no assurance that the U.S. Government would provide financial support to its agencies or instrumentalities (including government-sponsored enterprises) where it is not obligated to do so.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Crypto Industry Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Crypto Industry Risk. Investing in the Crypto Industry involves substantial risks, including but not limited to market volatility, regulatory changes, technological obsolescence, and security vulnerabilities. Crypto Industry companies typically face significant volatility due to the nascent and rapidly evolving nature of the sector. High research and capital expenditures are common, which can result in substantial variability in profitability, or even sustained losses. The industry is intensely competitive, with technological advancements occurring at a rapid pace, potentially rendering existing products or services obsolete. These companies are heavily reliant on digital and intellectual property, including proprietary blockchain technology and cryptographic algorithms, and may be adversely affected by the loss, theft, or impairment of these assets. Furthermore, the Crypto Industry is subject to a complex and constantly changing legal, regulatory, and political landscape, which can have a substantial impact on the profitability and viability of companies within the sector. Regulatory actions or unfavorable legal rulings could significantly hinder operations or market access. Additionally, security breaches, hacking incidents, or failures in the underlying technology of a crypto asset or blockchain could have devastating effects on the issuer, particularly if the compromised asset or technology is central to the issuer’s business model. The Crypto Industry has been, and may continue to be, dependent on speculation. The identification and classification of Crypto Industry companies can be challenging, as the boundaries of the industry are often unclear and subject to interpretation.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Blockchain Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
oBlockchain Risk. Companies involved in the crypto asset industry are subject to the risks associated with blockchain technology, the occurrence of which could negatively impact the value of such companies. These risks include (i) the risk that the integrity and viability of the consensus mechanism of the blockchain fails; (ii) the risk that the blockchain’s capacity to execute and settle transactions in a timely and predictable manner is compromised; (iii) the open source nature of blockchain technology which makes it vulnerable to being “forked” by users and miners/validators (i.e., creation of a new competing blockchain when a significant portion of the miners/validators adopts updates to the existing blockchain protocol); and (iv) development of so-called Layer 2 networks, including the “Lightning Network,” which are separate blockchains built on top of “Layer 1” blockchains, like the Bitcoin Blockchain, for the purpose of augmenting the throughput of the Layer 1 blockchain. Layer 2 blockchains are a relatively new and still developing technology and include certain risks, such as the potential for hacks, bugs or failures. 

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | Crypto Asset Trading Platform Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
oCrypto Asset Trading Platform Risk. Companies involved in the crypto asset industry are subject to the risks associated with crypto asset trading platforms. Crypto asset trading platforms and other trading venues on which crypto assets trade are relatively new and, in most cases, largely unregulated and may therefore be more exposed to market manipulation, fraud and failure than established, regulated exchanges for securities, derivatives and other currencies. Crypto asset trading platforms may (and in certain cases have) become subject to enforcement actions by regulatory authorities.

 

YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF | YieldMax™ Crypto Industry & Tech Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol LFGY
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.99% [3]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [3]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [3],[4]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.99% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 315
YieldMax™ China Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading YieldMax™ China Portfolio Option Income ETF - FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s primary investment objective is to seek current income. The Fund’s secondary objective is to seek capital appreciation via investments in a select portfolio of Greater China Companies (defined below).

 

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

 

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses(1)  (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in total annual fund operating expenses or in the expense example above, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not yet available.

 

Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then hold or redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example does not take into account brokerage commissions that you may pay on your purchases and sales of Shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is an actively managed exchange-traded fund (“ETF”) that seeks income and capital appreciation. The Fund’s strategy involves: (1) constructing a portfolio of U.S.-listed equity securities of Greater China Companies (each, an “Underlying Security”) (the “Equity Strategy”) and (2) generating income through an options portfolio (the “Options Strategies”), which involve using options contracts on Underlying Securities and/or Greater China ETFs (described below). The Fund will also maintain a minor allocation to cash or U.S. Treasuries, not exceeding ten percent of its total assets.

 

Equity Strategy

 

The Fund’s investment sub-adviser, ZEGA Financial, LLC (“ZEGA” or the “Sub-Adviser”), selects the Greater China Companies for the Fund’s investments. Greater China Companies are companies either incorporated or headquartered in China, Taiwan or Hong Kong. The Fund will generally invest in these companies through depositary receipts, such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”), but may also hold common stock or other forms of equity ownership. To enable the Fund to effectively implement its Options Strategies, ZEGA evaluates the liquidity of a potential company’s depositary receipts (e.g., ADR or GDR) or other equity ownership, and the liquidity of its options contracts. The Fund may invest in companies of any market capitalization size. ZEGA will also evaluate price level and implied volatility (i.e., a measure of how much the market believes the price of a stock or other underlying asset will move in the future) when selecting companies for investment and will monitor for these factors when determining whether to select new companies or remove existing companies from the portfolio.

 

The Fund’s equity portfolio will generally be comprised of between fifteen and thirty companies. Dividends, if any, paid by the Fund’s equity portfolio holdings will contribute to the Fund’s income generation. In addition, the Fund’s equity portfolio may provide capital appreciation. The Fund’s strategy may result in high portfolio turnover on an annual basis.

 

Options Strategies

 

The Fund seeks to generate income from engaging in the Options Strategies primarily using options contracts on some or all of its Underlying Securities. In particular, the Fund will receive income in the form of a premium when it writes (sells) an option. By selling options, the Fund will earn premiums from buyers who pay for the right to buy or sell the underlying asset at a predetermined price. The Sub-Adviser can implement the Options Strategies in various market conditions. Depending on the Sub-Adviser’s outlook, ZEGA will select one Options Strategy or a combination of Options Strategies that it believes will best provide the Fund with current income while generally also attempting to capture some upside appreciation (potential for increase in asset value). Additionally, the Sub-Adviser considers the performance of the underlying securities. In some instances, the aim is to generate additional gains if the underlying security increases in value, while, in other cases, the aim is to limit losses if the underlying security decreases in value. Further, depending on the Sub-Adviser’s assessment of one or more of the Underlying Securities’ options contracts (e.g., they are insufficiently liquid or too costly), the Fund may employ Options Strategies using options on a “Greater China ETF” (i.e., a passively-managed, U.S.-listed ETF that seeks to track the performance of a Greater China Index (described below)). The Fund’s use of Options Strategies with Underlying Securities or ETFs will always be covered (e.g., the Fund may do call or put spreads).

 

The Fund may be subject to different outcomes depending on the Options Strategies used. For example:

 

●When writing a covered call (selling a call option on security the Fund already owns), the Fund might limit its potential for capital appreciation in exchange for premium income, which also provides some downside protection should the Underlying Security decline in value.

●When selling a credit spread (writing a call option at one strike price and buying another call option at a higher strike price or writing a put option at one strike price and buying another put option at a lower strike price), the Fund might limit the potential loss compared to selling an option outright, by capping it at the difference between the strike prices minus the net premium received. In a best case scenario, the options expire worthless and the Fund retains the premium on the written option.

●When selling a diagonal call spread (selling a call option with a nearer expiration date and buying a call option with a later expiration date at a different strike price), the Fund might benefit from the time decay (i.e., the reduction in an option’s value as the time to its expiration date approaches) of the nearer-term option. An option’s decay accelerates as its expiration date gets closer because there is less time for an investor to earn a profit from that option; however, there is no guarantee that the written option will expire worthless.

●Using an Options Strategy such as cash-secured put selling (selling put options while holding enough cash to purchase the underlying security if assigned), the Fund can potentially buy securities at lower prices should the Underlying Security decline in value due to the premium received, or retain the premium if the Underlying Security remains the same or increases in value.

●When selling calendar call spreads (selling a short-term option and buying a longer-term option at the same strike price), the Fund might benefit from the faster time decay of the short-term option. However, if the written option is exercised, the loss is offset by the premium received as well as the increase in value of the longer-term option.

●When selling collars (selling a call option and buying a put option to protect against significant price movements), the Fund might be able to generate income from the premium received while limiting potential losses. In a best case scenario, the security’s share price falls below the put strike price, and the Fund gains the difference between the security’s share price and strike price. Otherwise, the Fund will experience losses that will be partially offset by the premium received on the written option.

 

These Options Strategies impact the risk-return profile of the Fund, potentially affecting volatility, income generation, upside capture (gain potential), and capital preservation (protecting value).

 

Additionally, the premiums the Fund receives from selling options are directly influenced by market volatility; higher volatility (larger price swings) typically results in higher premiums. Therefore, the Sub-Adviser analyzes market conditions to determine the timing and type of Options Strategies to employ to achieve the primary objective of current income. By strategically entering and exiting options positions, the Sub-Adviser seeks to enhance the Fund’s income potential.

 

Treasuries

 

In addition, the Fund will hold cash or short-term U.S. Treasury securities. These securities serve a dual purpose: providing collateral for the Options Strategies and contributing to the Fund’s income generation.

 

Why invest in the Fund?

 

  ● The Fund seeks to generate income, which is not dependent on the value of the Underlying Securities.

 

  ● The Fund seeks to participate in some of the potential gains experienced by increases in the share prices of the Underlying Securities.

 

The Fund is classified as “non-diversified” under the 1940 Act.

 

Under normal circumstances, the Fund will invest at least 80% of the value of its assets, plus borrowings for investment purposes, in the equity securities of Greater China Companies, and in options contracts on Greater China Companies and on Greater China ETFs. For purposes of the foregoing, the Fund defines a “Greater China Company” as a company that is either incorporated or headquartered in China, Taiwan or Hong Kong. The Fund defines a “Greater China ETF” as a passively managed U.S.-listed ETF that seeks to track the performance of a Greater China Index. Lastly, the Fund defines a “Greater China Index” as a benchmark that tracks the performance of a selection of Greater China Companies.

 

There is no guarantee that the Fund’s investment strategy will be properly implemented, and an investor may lose some or all of its investment.

 

Risk [Heading] rr_RiskHeading Principal Investment Risks
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus. When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance. Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund. Updated performance information will be available on the Fund’s website at www.yieldmaxetfs.com.

 

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.yieldmaxetfs.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund.
YieldMax™ China Portfolio Option Income ETF | Risk Lose Money [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
YieldMax™ China Portfolio Option Income ETF | Derivatives Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Derivatives Risk. Derivatives are financial instruments that derive value from the underlying reference asset or assets, such as stocks, bonds, or funds (including ETFs), interest rates or indexes. The Fund’s investments in derivatives may pose risks in addition to, and greater than, those associated with directly investing in securities or other ordinary investments, including risk related to the market, imperfect correlation with underlying investments or the Fund’s other portfolio holdings, higher price volatility, lack of availability, counterparty risk, liquidity, valuation and legal restrictions. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The use of derivatives may result in larger losses or smaller gains than directly investing in securities. When the Fund uses derivatives, there may be an imperfect correlation between the value of the Underlying Security and the derivative, which may prevent the Fund from achieving its investment objective. Because derivatives often require only a limited initial investment, the use of derivatives may expose the Fund to losses in excess of those amounts initially invested. In addition, the Fund’s investments in derivatives are subject to the following risks:

 

YieldMax™ China Portfolio Option Income ETF | Options Contracts [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Options Contracts. The use of options contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. For the Fund in particular, the value of the options contracts in which it invests are substantially influenced by the value of the Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. The Fund may also write call and put options, which includes the risk that the underlying instrument appreciates or depreciates sufficiently over the period to offset the net premium received by the Fund for the written option, resulting in a loss to the Fund. Additionally, to the extent the Fund maintains indirect exposure to an Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.

 

YieldMax™ China Portfolio Option Income ETF | Counterparty Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in options contracts. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

 

YieldMax™ China Portfolio Option Income ETF | Distribution Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Distribution Risk. As part of the Fund’s investment objective to provide current income, the Fund seeks to provide monthly income distributions. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ China Portfolio Option Income ETF | NAV Erosion Risk Due to Distributions [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

NAV Erosion Risk Due to Distributions. When the Fund makes a distribution, the Fund’s NAV will typically drop by the amount of the distribution on the related ex-dividend date (i.e., the date by which you need to own a dividend-paying stock in order to receive the upcoming dividend payment). The repeated payment of distributions by the Fund, if any, may significantly erode the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ China Portfolio Option Income ETF | Equity Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Equity Market Risk. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from specific issuers. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks, such as those held by the Fund, are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

 

YieldMax™ China Portfolio Option Income ETF | ETF Risks [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

ETF Risks.

YieldMax™ China Portfolio Option Income ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as “Authorized Participants” or “APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

 

YieldMax™ China Portfolio Option Income ETF | Cash Redemption Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.

 

YieldMax™ China Portfolio Option Income ETF | Costs of Buying or Selling Share [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Costs of Buying or Selling Shares. Buying or selling Shares involves certain costs, including brokerage commissions, other charges imposed by brokers, and bid-ask spreads. The bid-ask spread represents the difference between the price at which an investor is willing to buy Shares and the price at which an investor is willing to sell Shares. The spread varies over time based on the Shares’ trading volume and market liquidity. The spread is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Due to the costs of buying or selling Shares, frequent trading of Shares may reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

 

YieldMax™ China Portfolio Option Income ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

 

YieldMax™ China Portfolio Option Income ETF | Trading [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.

 

YieldMax™ China Portfolio Option Income ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices.

 

YieldMax™ China Portfolio Option Income ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value. It may also be more difficult to enforce contractual or shareholder rights in emerging market countries, which could negatively impact the Fund’s investments.

 

YieldMax™ China Portfolio Option Income ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and certain additional risks. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. The Fund may invest in unsponsored depositary receipts. The issuers of unsponsored depositary receipts are not obligated to disclose material information in the United States and, therefore, there may be less information available regarding such issuers and there may not be a correlation between such information and the value of the depositary receipts. In addition, Chinese ADRs are subject to the risk of being delisted from U.S. exchanges if U.S. regulatory authorities are unable to review audited financial statements on a regular basis. The delisting of Chinese ADRs could significantly impact the value of the Fund and impair the Fund’s ability to achieve its investment objective.

 

YieldMax™ China Portfolio Option Income ETF | Foreign Currency Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Currency Risk. A Fund’s exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. Dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time for any number of reasons, including changes in interest rates and the imposition of currency controls or other political developments in the U.S. or abroad.

 

YieldMax™ China Portfolio Option Income ETF | General Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters or events, pandemic diseases, terrorism, regulatory events, and government controls.

 

YieldMax™ China Portfolio Option Income ETF | High Portfolio Turnover Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

 

YieldMax™ China Portfolio Option Income ETF | Inflation Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.

 

YieldMax™ China Portfolio Option Income ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Capitalization Risk.

YieldMax™ China Portfolio Option Income ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

YieldMax™ China Portfolio Option Income ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole.

 

YieldMax™ China Portfolio Option Income ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. Some small capitalization companies have limited product lines, markets, financial resources, and management personnel and tend to concentrate on fewer geographical markets relative to mid- and large-capitalization companies. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

 

YieldMax™ China Portfolio Option Income ETF | Market Events Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Events Risk. The Fund’s investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities and other financial instruments. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation (or expectations of inflation), deflation (or expectations of deflation), changes in the actual or perceived creditworthiness of issuers, general market liquidity, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. Conflict, loss of life and disaster connected to ongoing armed conflict between Ukraine and Russia in Europe and between Israel and Hamas in the Middle East could have severe adverse effects on the related region, including significant adverse effects on the regional or global economies and the markets for certain securities. The U.S. and the European Union have imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. These conflicts have contributed to recent market volatility and may continue to do so.

 

YieldMax™ China Portfolio Option Income ETF | Money Market Instrument Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.

 

YieldMax™ China Portfolio Option Income ETF | New Fund Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

New Fund Risk. The Fund is a recently organized management investment company with no operating history. As a result, prospective investors do not have a track record or history on which to base their investment decisions.

 

YieldMax™ China Portfolio Option Income ETF | Risk Nondiversified Status [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

 

YieldMax™ China Portfolio Option Income ETF | Operational Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund relies on third-parties for a range of services, including custody. Any delay or failure relating to engaging or maintaining such service providers may affect the Fund’s ability to meet its investment objective. Although the Fund, Adviser, and Sub-Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.

 

YieldMax™ China Portfolio Option Income ETF | Tax Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed.

 

YieldMax™ China Portfolio Option Income ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

U.S. Government and U.S. Agency Obligations Risk. The Fund may invest in securities issued by the U.S. government or its agencies or instrumentalities. U.S. Government obligations include securities issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, such as the U.S. Treasury. Payment of principal and interest on U.S. Government obligations may be backed by the full faith and credit of the United States or may be backed solely by the issuing or guaranteeing agency or instrumentality itself. In the latter case, the investor must look principally to the agency or instrumentality issuing or guaranteeing the obligation for ultimate repayment, which agency or instrumentality may be privately owned. There can be no assurance that the U.S. Government would provide financial support to its agencies or instrumentalities (including government-sponsored enterprises) where it is not obligated to do so.

 

YieldMax™ China Portfolio Option Income ETF | Greater China Investing Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Greater China Investing Risk. Investing in ADRs, GDRs, and other types of depositary receipts with underlying shares organized, listed, or domiciled in China, Hong Kong, and Taiwan involves unique and significant risks. These risks include the potential for nationalization, expropriation, or confiscatory taxation; substantial social, economic, and political uncertainties; dependency on exports and international trade; higher inflation rates; and extensive governmental control over the economy. Additionally, China’s economic structure, regulatory environment, and financial reporting standards differ markedly from those in more established markets, presenting challenges such as unreliable statistical data and the limited ability of the Public Company Accounting Oversight Board (“PCAOB”) to inspect audit work in China and Hong Kong. The close economic ties between China and Hong Kong mean that economic downturns or political instability in China could have a direct negative impact on Hong Kong’s economy and financial markets. Political risks, especially those related to China’s influence over Hong Kong and ongoing tensions with Taiwan, could further disrupt markets and undermine investor confidence. The potential end of the Hong Kong dollar’s peg to the U.S. dollar could also introduce currency risk, potentially affecting the Fund’s NAV. Additionally, Taiwan’s economy, which is heavily reliant on exports, faces vulnerabilities due to its dependence on global trade and the economies of key trading partners like the U.S., China, and Japan. These factors, along with the potential for underdeveloped financial reporting practices, public health crises, and geopolitical tensions, could severely impact the Fund’s performance.

 

YieldMax™ China Portfolio Option Income ETF | YieldMax™ China Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol CHNY
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.99% [5]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [5]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [5],[6]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.99% [5]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 315
YieldMax™ Semiconductor Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading YieldMax™ Semiconductor Portfolio Option Income ETF - FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s primary investment objective is to seek current income. The Fund’s secondary objective is to seek capital appreciation via investments in a select portfolio of Semiconductor Companies (defined below).

 

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

 

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses(1)  (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in total annual fund operating expenses or in the expense example above, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not yet available.

 

Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then hold or redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example does not take into account brokerage commissions that you may pay on your purchases and sales of Shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is an actively managed exchange-traded fund (“ETF”) that seeks income and capital appreciation. The Fund’s strategy involves: (1) constructing a portfolio of U.S.-listed equity securities of Semiconductor Companies (each, an “Underlying Security”) (the “Equity Strategy”) and (2) generating income through an options portfolio (the “Options Strategies”), which involve using options contracts on Underlying Securities and/or Semiconductor ETFs (described below). The Fund will also maintain a minor allocation to cash or U.S. Treasuries, not exceeding ten percent of its total assets.

 

Equity Strategy

 

The Fund’s investment sub-adviser, ZEGA Financial, LLC (“ZEGA” or the “Sub-Adviser”), selects the Semiconductor Companies in which the Fund will invest. Semiconductor Companies are companies that are involved in the design, manufacture, or sale of semiconductors or semiconductor equipment. To enable the Fund to effectively implement its Options Strategies, ZEGA evaluates the liquidity of a potential company’s common stock and the liquidity of its options contracts. The Fund may invest in companies of any market capitalization size. ZEGA will also evaluate price level and implied volatility (i.e., a measure of how much the market believes the price of a stock or other underlying asset will move in the future) when selecting companies for investment and will monitor for these factors when determining whether to select new companies or remove existing companies from the portfolio.

 

Semiconductor Companies may include companies from foreign countries, including emerging markets. Underlying Securities may include depositary receipts, such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”). The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in the same industry as that of the Semiconductor Companies, which subjects the Fund to specific industry-related risks.

 

The Fund’s equity portfolio will generally be comprised of between fifteen and thirty companies. Dividends, if any, paid by the Fund’s equity portfolio holdings will contribute to the Fund’s income generation. In addition, the Fund’s equity portfolio may provide capital appreciation. The Fund’s strategy may result in high portfolio turnover on an annual basis.

 

Options Strategies

 

The Fund seeks to generate income from engaging in the Options Strategies primarily using options contracts on some or all of its Underlying Securities. In particular, the Fund will receive income in the form of a premium when it writes (sells) an option. By selling options, the Fund will earn premiums from buyers who pay for the right to buy or sell the underlying asset at a predetermined price. The Sub-Adviser can implement the Options Strategies in various market conditions. Depending on the Sub-Adviser’s outlook, ZEGA will select one Options Strategy or a combination of Options Strategies that it believes will best provide the Fund with current income while generally also attempting to capture some upside appreciation (potential for increase in asset value). Additionally, the Sub-Adviser considers the performance of the underlying securities. In some instances, the aim is to generate additional gains if the underlying security increases in value, while, in other cases, the aim is to limit losses if the underlying security decreases in value. Further, depending on the Sub-Adviser’s assessment of one or more of the Underlying Securities’ options contracts (e.g., they are insufficiently liquid or too costly), the Fund may employ Options Strategies using options on an “Semiconductor ETF” (i.e., a passively-managed, U.S.-listed ETF that seeks to track the performance of an Semiconductor Index (described below)). The Fund’s use of Options Strategies with Underlying Securities or ETFs will always be covered (e.g., the Fund may do call or put spreads).

 

The Fund may be subject to different outcomes depending on the Options Strategies used. For example:

 

●When writing a covered call (selling a call option on security the Fund already owns), the Fund might limit its potential for capital appreciation in exchange for premium income, which also provides some downside protection should the Underlying Security decline in value.

●When selling a credit spread (writing a call option at one strike price and buying another call option at a higher strike price or writing a put option at one strike price and buying another put option at a lower strike price), the Fund might limit the potential loss compared to selling an option outright, by capping it at the difference between the strike prices minus the net premium received. In a best case scenario, the options expire worthless and the Fund retains the premium on the written option.

●When selling a diagonal call spread (selling a call option with a nearer expiration date and buying a call option with a later expiration date at a different strike price), the Fund might benefit from the time decay (i.e., the reduction in an option’s value as the time to its expiration date approaches) of the nearer-term option. An option’s decay accelerates as its expiration date gets closer because there is less time for an investor to earn a profit from that option; however, there is no guarantee that the written option will expire worthless.

●Using an Options Strategy such as cash-secured put selling (selling put options while holding enough cash to purchase the underlying security if assigned), the Fund can potentially buy securities at lower prices should the Underlying Security decline in value due to the premium received, or retain the premium if the Underlying Security remains the same or increases in value.

●When selling calendar call spreads (selling a short-term option and buying a longer-term option at the same strike price), the Fund might benefit from the faster time decay of the short-term option. However, if the written option is exercised, the loss is offset by the premium received as well as the increase in value of the longer-term option.

●When selling collars (selling a call option and buying a put option to protect against significant price movements), the Fund might be able to generate income from the premium received while limiting potential losses. In a best case scenario, the security’s share price falls below the put strike price, and the Fund gains the difference between the security’s share price and strike price. Otherwise, the Fund will experience losses that will be partially offset by the premium received on the written option.

 

These Options Strategies impact the risk-return profile of the Fund, potentially affecting volatility, income generation, upside capture (gain potential), and capital preservation (protecting value).

 

Additionally, the premiums the Fund receives from selling options are directly influenced by market volatility; higher volatility (larger price swings) typically results in higher premiums. Therefore, the Sub-Adviser analyzes market conditions to determine the timing and type of Options Strategies to employ to achieve the primary objective of current income. By strategically entering and exiting options positions, the Sub-Adviser seeks to enhance the Fund’s income potential.

 

Treasuries

 

In addition, the Fund will hold cash or short-term U.S. Treasury securities. These securities serve a dual purpose: providing collateral for the Options Strategies and contributing to the Fund’s income generation.

 

Why invest in the Fund?

 

  ● The Fund seeks to generate income, which is not dependent on the value of the Underlying Securities.

 

  ● The Fund seeks to participate in some of the potential gains experienced by increases in the share prices of the Underlying Securities.

 

The Fund is classified as “non-diversified” under the 1940 Act.

 

Under normal circumstances, the Fund will invest at least 80% of the value of its assets, plus borrowings for investment purposes, in the equity securities of Semiconductor Companies and in options contracts on Semiconductor Companies and on Semiconductor ETFs. For purposes of the foregoing, the Fund defines a “Semiconductor Company” as a company that generates at least 50% of its revenue from the design, manufacture, or sale of semiconductors or semiconductor equipment, and a “Semiconductor ETF” as a passively-managed, U.S.-listed ETF that seeks to track the performance of a semiconductor index. Lastly, the Fund defines a “Semiconductor Index” as a benchmark that tracks the performance of a selection of stocks from companies operating in the semiconductor industry.

 

There is no guarantee that the Fund’s investment strategy will be properly implemented, and an investor may lose some or all of its investment.

 

Risk [Heading] rr_RiskHeading Principal Investment Risks
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ETF Risks.

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Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus. When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance. Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund. Updated performance information will be available on the Fund’s website at www.yieldmaxetfs.com.

 

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.yieldmaxetfs.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund.
YieldMax™ Semiconductor Portfolio Option Income ETF | Risk Lose Money [Member]  
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Risk [Text Block] rr_RiskTextBlock As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
YieldMax™ Semiconductor Portfolio Option Income ETF | Derivatives Risk [Member]  
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Derivatives Risk. Derivatives are financial instruments that derive value from the underlying reference asset or assets, such as stocks, bonds, or funds (including ETFs), interest rates or indexes. The Fund’s investments in derivatives may pose risks in addition to, and greater than, those associated with directly investing in securities or other ordinary investments, including risk related to the market, imperfect correlation with underlying investments or the Fund’s other portfolio holdings, higher price volatility, lack of availability, counterparty risk, liquidity, valuation and legal restrictions. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The use of derivatives may result in larger losses or smaller gains than directly investing in securities. When the Fund uses derivatives, there may be an imperfect correlation between the value of the Underlying Security and the derivative, which may prevent the Fund from achieving its investment objective. Because derivatives often require only a limited initial investment, the use of derivatives may expose the Fund to losses in excess of those amounts initially invested. In addition, the Fund’s investments in derivatives are subject to the following risks:

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Options Contracts [Member]  
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Options Contracts. The use of options contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. For the Fund in particular, the value of the options contracts in which it invests are substantially influenced by the value of the Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. The Fund may also write call and put options, which includes the risk that the underlying instrument appreciates or depreciates sufficiently over the period to offset the net premium received by the Fund for the written option, resulting in a loss to the Fund. Additionally, to the extent the Fund maintains indirect exposure to an Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Counterparty Risk [Member]  
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Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in options contracts. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Distribution Risk [Member]  
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Distribution Risk. As part of the Fund’s investment objective to provide current income, the Fund seeks to provide monthly income distributions. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | NAV Erosion Risk Due to Distributions [Member]  
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NAV Erosion Risk Due to Distributions. When the Fund makes a distribution, the Fund’s NAV will typically drop by the amount of the distribution on the related ex-dividend date (i.e., the date by which you need to own a dividend-paying stock in order to receive the upcoming dividend payment). The repeated payment of distributions by the Fund, if any, may significantly erode the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Equity Market Risk [Member]  
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Equity Market Risk. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from specific issuers. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks, such as those held by the Fund, are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Concentration Risk [Member]  
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Concentration Risk. The Fund will be concentrate its investments in the same industry as that of the Semiconductor Companies. To the extent that the Fund concentrates in a group of industries, it will be subject to the risk that economic, political, or other conditions that have a negative effect on that group of industries will negatively impact them to a greater extent than if its assets were invested in a wider variety of industries.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
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Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as “Authorized Participants” or “APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Cash Redemption Risk [Member]  
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Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Costs of Buying or Selling Share [Member]  
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Costs of Buying or Selling Shares. Buying or selling Shares involves certain costs, including brokerage commissions, other charges imposed by brokers, and bid-ask spreads. The bid-ask spread represents the difference between the price at which an investor is willing to buy Shares and the price at which an investor is willing to sell Shares. The spread varies over time based on the Shares’ trading volume and market liquidity. The spread is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Due to the costs of buying or selling Shares, frequent trading of Shares may reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Shares May Trade at Prices Other Than NAV [Member]  
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Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Trading [Member]  
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Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Foreign Securities Risk [Member]  
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Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Emerging Markets Risk [Member]  
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Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value. It may also be more difficult to enforce contractual or shareholder rights in emerging market countries, which could negatively impact the Fund’s investments.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Depositary Receipt Risk [Member]  
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Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and certain additional risks. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. The Fund may invest in unsponsored depositary receipts. The issuers of unsponsored depositary receipts are not obligated to disclose material information in the United States and, therefore, there may be less information available regarding such issuers and there may not be a correlation between such information and the value of the depositary receipts.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Foreign Currency Risk [Member]  
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Foreign Currency Risk. A Fund’s exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. Dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time for any number of reasons, including changes in interest rates and the imposition of currency controls or other political developments in the U.S. or abroad.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | General Market Risk [Member]  
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General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters or events, pandemic diseases, terrorism, regulatory events, and government controls.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | High Portfolio Turnover Risk [Member]  
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High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Inflation Risk [Member]  
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Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Market Capitalization Risk [Member]  
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Market Capitalization Risk.

YieldMax™ Semiconductor Portfolio Option Income ETF | Large-Capitalization Investing [Member]  
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  ○ Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Mid-Capitalization Investing [Member]  
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  ○ Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Small-Capitalization Investing [Member]  
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  ○ Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. Some small capitalization companies have limited product lines, markets, financial resources, and management personnel and tend to concentrate on fewer geographical markets relative to mid- and large-capitalization companies. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Market Events Risk [Member]  
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Market Events Risk. The Fund’s investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities and other financial instruments. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation (or expectations of inflation), deflation (or expectations of deflation), changes in the actual or perceived creditworthiness of issuers, general market liquidity, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. Conflict, loss of life and disaster connected to ongoing armed conflict between Ukraine and Russia in Europe and between Israel and Hamas in the Middle East could have severe adverse effects on the related region, including significant adverse effects on the regional or global economies and the markets for certain securities. The U.S. and the European Union have imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. These conflicts have contributed to recent market volatility and may continue to do so.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Money Market Instrument Risk [Member]  
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Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | New Fund Risk [Member]  
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New Fund Risk. The Fund is a recently organized management investment company with no operating history. As a result, prospective investors do not have a track record or history on which to base their investment decisions.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Risk Nondiversified Status [Member]  
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Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Operational Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund relies on third-parties for a range of services, including custody. Any delay or failure relating to engaging or maintaining such service providers may affect the Fund’s ability to meet its investment objective. Although the Fund, Adviser, and Sub-Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.  

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Tax Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

U.S. Government and U.S. Agency Obligations Risk. The Fund may invest in securities issued by the U.S. government or its agencies or instrumentalities. U.S. Government obligations include securities issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, such as the U.S. Treasury. Payment of principal and interest on U.S. Government obligations may be backed by the full faith and credit of the United States or may be backed solely by the issuing or guaranteeing agency or instrumentality itself. In the latter case, the investor must look principally to the agency or instrumentality issuing or guaranteeing the obligation for ultimate repayment, which agency or instrumentality may be privately owned. There can be no assurance that the U.S. Government would provide financial support to its agencies or instrumentalities (including government-sponsored enterprises) where it is not obligated to do so.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | Semiconductor Industry Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Semiconductor Industry Risk. Semiconductor companies may face intense competition, both domestically and internationally, and such competition may have an adverse effect on their profit margins. Semiconductor companies may have limited product lines, markets, financial resources or personnel. Semiconductor companies’ supply chain and operations are dependent on the availability of materials that meet exacting standards and the use of third parties to provide components and services. Semiconductor companies may rely on a limited number of suppliers, or upon suppliers in a single location, for certain materials, equipment or tools. Finding and qualifying alternate or additional suppliers can be a lengthy process that can cause production delays or impose unforeseen costs, and such alternatives may not be available at all. Production can be disrupted by the unavailability of resources, such as water, silicon, electricity, gases and other materials. Suppliers may also increase prices or encounter cybersecurity or other issues that can disrupt production or increase production costs.

 

The products of semiconductor companies may face obsolescence due to rapid technological developments and frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Capital equipment expenditures could be substantial, and equipment generally suffers from rapid obsolescence. Companies in the semiconductor industry are heavily dependent on patent and intellectual property rights. The loss or impairment of these rights would adversely affect the profitability of these companies.

 

YieldMax™ Semiconductor Portfolio Option Income ETF | YieldMax™ Semiconductor Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol CHPY
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.99% [7]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [7]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [7],[8]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.99% [7]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 315
YieldMax™ Biotech & Pharma Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading YieldMax™ Biotech & Pharma Portfolio Option Income ETF - FUND SUMMARY
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s primary investment objective is to seek current income. The Fund’s secondary objective is to seek capital appreciation via investments in a select portfolio of Biotech and Pharma Companies (defined below).

 

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.

 

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses(1)  (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in total annual fund operating expenses or in the expense example above, affect the Fund’s performance. Because the Fund is newly organized, portfolio turnover information is not yet available.

 

Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then hold or redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example does not take into account brokerage commissions that you may pay on your purchases and sales of Shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is an actively managed exchange-traded fund (“ETF”) that seeks income and capital appreciation. The Fund’s strategy involves: (1) constructing a portfolio of U.S.-listed equity securities of Biotech and Pharma Companies (each, an “Underlying Security”) (the “Equity Strategy”) and (2) generating income through an options portfolio (the “Options Strategies”), which involve using options contracts on Underlying Securities and/or Biotech and Pharma ETFs (described below). The Fund will also maintain a minor allocation to cash or U.S. Treasuries, not exceeding ten percent of its total assets.

 

Equity Strategy

 

The Fund’s investment sub-adviser, ZEGA Financial, LLC (“ZEGA” or the “Sub-Adviser”), selects the Biotech and Pharma Companies in which the Fund will invest. Biotech and Pharma Companies companies are involved in the research, development, manufacturing, and commercialization of biotechnological and pharmaceutical products. To enable the Fund to effectively implement its Options Strategies, ZEGA evaluates the liquidity of a potential company’s common stock and the liquidity of its options contracts. The Fund may invest in companies of any market capitalization size. ZEGA will also evaluate price level and implied volatility (i.e., a measure of how much the market believes the price of a stock or other underlying asset will move in the future) when selecting companies for investment and will monitor for these factors when determining whether to select new companies or remove existing companies from the portfolio.

 

Biotech and Pharma Companies may include companies from foreign countries, including emerging markets. Underlying Securities may include depositary receipts, such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”). The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in the same industry group as that of the Biotech and Pharma Companies, which subjects the Fund to specific industry-related risks.

 

The Fund’s equity portfolio will generally be comprised of between fifteen and thirty companies. Dividends, if any, paid by the Fund’s equity portfolio holdings will contribute to the Fund’s income generation. In addition, the Fund’s equity portfolio may provide capital appreciation. The Fund’s strategy may result in high portfolio turnover on an annual basis.

 

Options Strategies

 

The Fund seeks to generate income from engaging in the Options Strategies primarily using options contracts on some or all of its Underlying Securities. In particular, the Fund will receive income in the form of a premium when it writes (sells) an option. By selling options, the Fund will earn premiums from buyers who pay for the right to buy or sell the underlying asset at a predetermined price. The Sub-Adviser can implement the Options Strategies in various market conditions. Depending on the Sub-Adviser’s outlook, ZEGA will select one Options Strategy or a combination of Options Strategies that it believes will best provide the Fund with current income while generally also attempting to capture some upside appreciation (potential for increase in asset value). Additionally, the Sub-Adviser considers the performance of the underlying securities. In some instances, the aim is to generate additional gains if the underlying security increases in value, while, in other cases, the aim is to limit losses if the underlying security decreases in value. Further, depending on the Sub-Adviser’s assessment of one or more of the Underlying Securities’ options contracts (e.g., they are insufficiently liquid or too costly), the Fund may employ Options Strategies using options on an “Biotech and Pharma ETF” (i.e., a passively-managed, U.S.-listed ETF that seeks to track the performance of an Biotech and Pharma Index (described below)). The Fund’s use of Options Strategies with Underlying Securities or ETFs will always be covered (e.g., the Fund may do call or put spreads).

 

The Fund may be subject to different outcomes depending on the Options Strategies used. For example:

 

●When writing a covered call (selling a call option on security the Fund already owns), the Fund might limit its potential for capital appreciation in exchange for premium income, which also provides some downside protection should the Underlying Security decline in value.

●When selling a credit spread (writing a call option at one strike price and buying another call option at a higher strike price or writing a put option at one strike price and buying another put option at a lower strike price), the Fund might limit the potential loss compared to selling an option outright, by capping it at the difference between the strike prices minus the net premium received. In a best case scenario, the options expire worthless and the Fund retains the premium on the written option.

●When selling a diagonal call spread (selling a call option with a nearer expiration date and buying a call option with a later expiration date at a different strike price), the Fund might benefit from the time decay (i.e., the reduction in an option’s value as the time to its expiration date approaches) of the nearer-term option. An option’s decay accelerates as its expiration date gets closer because there is less time for an investor to earn a profit from that option; however, there is no guarantee that the written option will expire worthless.

●Using an Options Strategy such as cash-secured put selling (selling put options while holding enough cash to purchase the underlying security if assigned), the Fund can potentially buy securities at lower prices should the Underlying Security decline in value due to the premium received, or retain the premium if the Underlying Security remains the same or increases in value.

●When selling calendar call spreads (selling a short-term option and buying a longer-term option at the same strike price), the Fund might benefit from the faster time decay of the short-term option. However, if the written option is exercised, the loss is offset by the premium received as well as the increase in value of the longer-term option.

●When selling collars (selling a call option and buying a put option to protect against significant price movements), the Fund might be able to generate income from the premium received while limiting potential losses. In a best case scenario, the security’s share price falls below the put strike price, and the Fund gains the difference between the security’s share price and strike price. Otherwise, the Fund will experience losses that will be partially offset by the premium received on the written option.

 

These Options Strategies impact the risk-return profile of the Fund, potentially affecting volatility, income generation, upside capture (gain potential), and capital preservation (protecting value).

 

Additionally, the premiums the Fund receives from selling options are directly influenced by market volatility; higher volatility (larger price swings) typically results in higher premiums. Therefore, the Sub-Adviser analyzes market conditions to determine the timing and type of Options Strategies to employ to achieve the primary objective of current income. By strategically entering and exiting options positions, the Sub-Adviser seeks to enhance the Fund’s income potential.

 

Treasuries

 

In addition, the Fund will hold cash or short-term U.S. Treasury securities. These securities serve a dual purpose: providing collateral for the Options Strategies and contributing to the Fund’s income generation.

 

Why invest in the Fund?

 

  ● The Fund seeks to generate income, which is not dependent on the value of the Underlying Securities.

 

  ● The Fund seeks to participate in some of the potential gains experienced by increases in the share prices of the Underlying Securities.

 

The Fund is classified as “non-diversified” under the 1940 Act.

 

Under normal circumstances, the Fund will invest at least 80% of the value of its assets, plus borrowings for investment purposes, in the equity securities of Biotech and Pharma Companies and in options contracts on Biotech and Pharma Companies and on Biotech and Pharma ETFs. For purposes of the foregoing, the Fund defines a “Biotech and Pharma Company” as a company that generates at least 50% of its revenue from the research, development, manufacturing, and commercialization of biotechnological and pharmaceutical products, and a “Biotech and Pharma ETF” as a passively-managed, U.S.-listed ETF that seeks to track the performance of a biotech and/or pharma index.

 

There is no guarantee that the Fund’s investment strategy will be properly implemented, and an investor may lose some or all of its investment.

 

Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk [Text Block] rr_RiskTextBlock

ETF Risks.

Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus. When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance. Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund. Updated performance information will be available on the Fund’s website at www.yieldmaxetfs.com.

 

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns When such information is included, this section will provide some indication of the risks of investing in the Fund by showing changes in the Fund’s performance history from year to year and showing how the Fund’s average annual total returns compare with those of a broad measure of market performance.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund has not completed a full calendar year of operations as of the date of this Prospectus.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.yieldmaxetfs.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Although past performance of the Fund is no guarantee of how it will perform in the future, historical performance may give you some indication of the risks of investing in the Fund.
YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Risk Lose Money [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Derivatives Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Derivatives Risk. Derivatives are financial instruments that derive value from the underlying reference asset or assets, such as stocks, bonds, or funds (including ETFs), interest rates or indexes. The Fund’s investments in derivatives may pose risks in addition to, and greater than, those associated with directly investing in securities or other ordinary investments, including risk related to the market, imperfect correlation with underlying investments or the Fund’s other portfolio holdings, higher price volatility, lack of availability, counterparty risk, liquidity, valuation and legal restrictions. The use of derivatives is a highly specialized activity that involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. The use of derivatives may result in larger losses or smaller gains than directly investing in securities. When the Fund uses derivatives, there may be an imperfect correlation between the value of the Underlying Security and the derivative, which may prevent the Fund from achieving its investment objective. Because derivatives often require only a limited initial investment, the use of derivatives may expose the Fund to losses in excess of those amounts initially invested. In addition, the Fund’s investments in derivatives are subject to the following risks:

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Options Contracts [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Options Contracts. The use of options contracts involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, including the anticipated volatility, which are affected by fiscal and monetary policies and by national and international political, changes in the actual or implied volatility or the reference asset, the time remaining until the expiration of the option contract and economic events. For the Fund in particular, the value of the options contracts in which it invests are substantially influenced by the value of the Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. The Fund may also write call and put options, which includes the risk that the underlying instrument appreciates or depreciates sufficiently over the period to offset the net premium received by the Fund for the written option, resulting in a loss to the Fund. Additionally, to the extent the Fund maintains indirect exposure to an Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Counterparty Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in options contracts. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Distribution Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Distribution Risk. As part of the Fund’s investment objective to provide current income, the Fund seeks to provide monthly income distributions. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | NAV Erosion Risk Due to Distributions [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

NAV Erosion Risk Due to Distributions. When the Fund makes a distribution, the Fund’s NAV will typically drop by the amount of the distribution on the related ex-dividend date (i.e., the date by which you need to own a dividend-paying stock in order to receive the upcoming dividend payment). The repeated payment of distributions by the Fund, if any, may significantly erode the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Equity Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Equity Market Risk. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from specific issuers. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks, such as those held by the Fund, are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Concentration Risk. The Fund will concentrate its investments in the same industry group as that of the Biotech and Pharma Companies. To the extent that the Fund concentrates in a group of industries, it will be subject to the risk that economic, political, or other conditions that have a negative effect on that group of industries will negatively impact them to a greater extent than if its assets were invested in a wider variety of industries.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as “Authorized Participants” or “APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Cash Redemption Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Costs of Buying or Selling Share [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Costs of Buying or Selling Shares. Buying or selling Shares involves certain costs, including brokerage commissions, other charges imposed by brokers, and bid-ask spreads. The bid-ask spread represents the difference between the price at which an investor is willing to buy Shares and the price at which an investor is willing to sell Shares. The spread varies over time based on the Shares’ trading volume and market liquidity. The spread is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Due to the costs of buying or selling Shares, frequent trading of Shares may reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Trading [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value. It may also be more difficult to enforce contractual or shareholder rights in emerging market countries, which could negatively impact the Fund’s investments.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and certain additional risks. Depositary receipts listed on U.S. exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (“Underlying Shares”). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares. The Fund may invest in unsponsored depositary receipts. The issuers of unsponsored depositary receipts are not obligated to disclose material information in the United States and, therefore, there may be less information available regarding such issuers and there may not be a correlation between such information and the value of the depositary receipts.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Foreign Currency Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Foreign Currency Risk. A Fund’s exposure to foreign currencies subjects the Fund to the risk that those currencies will decline in value relative to the U.S. Dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time for any number of reasons, including changes in interest rates and the imposition of currency controls or other political developments in the U.S. or abroad.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | General Market Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters or events, pandemic diseases, terrorism, regulatory events, and government controls.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | High Portfolio Turnover Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Inflation Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Capitalization Risk.

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock
  ○ Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. Some small capitalization companies have limited product lines, markets, financial resources, and management personnel and tend to concentrate on fewer geographical markets relative to mid- and large-capitalization companies. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Market Events Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Market Events Risk. The Fund’s investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities and other financial instruments. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation (or expectations of inflation), deflation (or expectations of deflation), changes in the actual or perceived creditworthiness of issuers, general market liquidity, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. Conflict, loss of life and disaster connected to ongoing armed conflict between Ukraine and Russia in Europe and between Israel and Hamas in the Middle East could have severe adverse effects on the related region, including significant adverse effects on the regional or global economies and the markets for certain securities. The U.S. and the European Union have imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. These conflicts have contributed to recent market volatility and may continue to do so.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Money Market Instrument Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | New Fund Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

New Fund Risk. The Fund is a recently organized management investment company with no operating history. As a result, prospective investors do not have a track record or history on which to base their investment decisions.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Risk Nondiversified Status [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Operational Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Operational Risk. The Fund is subject to risks arising from various operational factors, including, but not limited to, human error, processing and communication errors, errors of the Fund’s service providers, counterparties or other third-parties, failed or inadequate processes and technology or systems failures. The Fund relies on third-parties for a range of services, including custody. Any delay or failure relating to engaging or maintaining such service providers may affect the Fund’s ability to meet its investment objective. Although the Fund, Adviser, and Sub-Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Tax Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

U.S. Government and U.S. Agency Obligations Risk. The Fund may invest in securities issued by the U.S. government or its agencies or instrumentalities. U.S. Government obligations include securities issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, such as the U.S. Treasury. Payment of principal and interest on U.S. Government obligations may be backed by the full faith and credit of the United States or may be backed solely by the issuing or guaranteeing agency or instrumentality itself. In the latter case, the investor must look principally to the agency or instrumentality issuing or guaranteeing the obligation for ultimate repayment, which agency or instrumentality may be privately owned. There can be no assurance that the U.S. Government would provide financial support to its agencies or instrumentalities (including government-sponsored enterprises) where it is not obligated to do so.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | Biotech and Pharma Industry Group Risk [Member]  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk [Text Block] rr_RiskTextBlock

Biotech and Pharma Industry Group Risk. Companies in the biotech and pharmaceuticals industry group may be highly volatile and affected by industry competition, dependency on a limited number of products, obsolescence of products, government approvals and regulations, loss or impairment of intellectual property rights and litigation regarding product liability. These companies can be significantly affected by patent considerations, including the termination of patent protections for products, intense competition both domestically and internationally, rapid technological change and expensive insurance costs due to the risk of product liability lawsuits. In addition, this industry group is an emerging growth industry, and therefore some companies may be thinly capitalized and more volatile than companies with greater capitalizations. Biotechnology and pharmaceutical companies must contend with high development costs, which may be exacerbated by the inability to raise prices to cover costs because of managed care pressure, government regulation or price controls.

 

YieldMax™ Biotech & Pharma Portfolio Option Income ETF | YieldMax™ Biotech & Pharma Portfolio Option Income ETF  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol DRGY
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.99% [9]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [9]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets none [9],[10]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 0.99% [9]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 315
[1] The Fund’s investment adviser, Tidal Investments LLC (the “Adviser”), a Tidal Financial Group company, will pay, or require a sub-adviser to pay, all expenses incurred by the Fund (except for advisory fees and sub-advisory fees, as the case may be) excluding interest charges on any borrowings made for investment purposes, dividends and other expenses on securities sold short, taxes, brokerage commissions and other expenses incurred in placing orders for the purchase and sale of securities and other investment instruments, acquired fund fees and expenses, accrued deferred tax liability, distribution fees and expenses paid by the Fund under any distribution plan adopted pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), and litigation expenses and other non-routine or extraordinary expenses.
[2] Based on estimated amounts for the current fiscal year.
[3] The Fund’s investment adviser, Tidal Investments LLC (the “Adviser”), a Tidal Financial Group company, will pay, or require a sub-adviser to pay, all expenses incurred by the Fund (except for advisory fees and sub-advisory fees, as the case may be) excluding interest charges on any borrowings made for investment purposes, dividends and other expenses on securities sold short, taxes, brokerage commissions and other expenses incurred in placing orders for the purchase and sale of securities and other investment instruments, acquired fund fees and expenses, accrued deferred tax liability, distribution fees and expenses paid by the Fund under any distribution plan adopted pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), and litigation expenses and other non-routine or extraordinary expenses.
[4] Based on estimated amounts for the current fiscal year.
[5] The Fund’s investment adviser, Tidal Investments LLC (the “Adviser”), a Tidal Financial Group company, will pay, or require a sub-adviser to pay, all expenses incurred by the Fund (except for advisory fees and sub-advisory fees, as the case may be) excluding interest charges on any borrowings made for investment purposes, dividends and other expenses on securities sold short, taxes, brokerage commissions and other expenses incurred in placing orders for the purchase and sale of securities and other investment instruments, acquired fund fees and expenses, accrued deferred tax liability, distribution fees and expenses paid by the Fund under any distribution plan adopted pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), and litigation expenses and other non-routine or extraordinary expenses.
[6] Based on estimated amounts for the current fiscal year.
[7] The Fund’s investment adviser, Tidal Investments LLC (the “Adviser”), a Tidal Financial Group company, will pay, or require a sub-adviser to pay, all expenses incurred by the Fund (except for advisory fees and sub-advisory fees, as the case may be) excluding interest charges on any borrowings made for investment purposes, dividends and other expenses on securities sold short, taxes, brokerage commissions and other expenses incurred in placing orders for the purchase and sale of securities and other investment instruments, acquired fund fees and expenses, accrued deferred tax liability, distribution fees and expenses paid by the Fund under any distribution plan adopted pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), and litigation expenses and other non-routine or extraordinary expenses.
[8] Based on estimated amounts for the current fiscal year.
[9] The Fund’s investment adviser, Tidal Investments LLC (the “Adviser”), a Tidal Financial Group company, will pay, or require a sub-adviser to pay, all expenses incurred by the Fund (except for advisory fees and sub-advisory fees, as the case may be) excluding interest charges on any borrowings made for investment purposes, dividends and other expenses on securities sold short, taxes, brokerage commissions and other expenses incurred in placing orders for the purchase and sale of securities and other investment instruments, acquired fund fees and expenses, accrued deferred tax liability, distribution fees and expenses paid by the Fund under any distribution plan adopted pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended (the “1940 Act”), and litigation expenses and other non-routine or extraordinary expenses.
[10] Based on estimated amounts for the current fiscal year.