Investment Risks |
Apr. 07, 2026 |
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| Defiance Space Data Center Leaders ETF | Space Data Center Company and Industry Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Space Data Center Company and Industry Risks. The Fund invests primarily in companies that derive a significant portion of their revenue from, or have a substantial portion of their operations engaged in, space-based data processing, storage, transmission, and related orbital infrastructure (“Space Data Center Companies”). Space Data Center Companies may be subject to heightened volatility due to developing or unproven technologies and business models, rapid technological change, intense competition, high capital requirements, and reliance on external financing. Space Data Center Companies rely on the successful development, launch, deployment, and operation of space-based infrastructure, including satellites and in-orbit computing platforms. Space Data Center Companies also face substantial operational and regulatory risks associated with space-based assets, including launch failures or delays, collisions, space debris, equipment malfunctions, cybersecurity incidents, and the inability to repair or replace in-orbit infrastructure. These companies are subject to complex and evolving domestic and international regulations (including satellite licensing and spectrum allocation, export controls, data transmission and cybersecurity, and national security considerations), and adverse regulatory or geopolitical developments, supply chain disruptions, customer or contract concentration, or reduced access to capital may materially adversely affect these companies and the Fund’s performance.
In addition, rapid technological change and innovation may render existing technologies obsolete or less competitive. Regulatory changes, geopolitical tensions, or adverse government actions may increase costs, restrict operations, or limit growth opportunities. The industry is also capital intensive and highly competitive, and companies may depend on access to external financing, key suppliers, launch providers, or a limited number of customers or contracts.
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| Defiance Space Data Center Leaders ETF | Equity Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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:
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| Defiance Space Data Center Leaders ETF | Options Contracts [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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 relevant underlying securities. 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. Additionally, as the Fund may continuously maintain indirect exposure to one or more of the underlying securities 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.
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| Defiance Space Data Center Leaders ETF | Swap Agreements [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Swap Agreements. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If an underlying security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund could be forced to invest directly in the underlying security at a potentially unfavorable time.
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| Defiance Space Data Center Leaders ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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. 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.
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| Defiance Space Data Center Leaders ETF | Industry Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Industry Concentration Risk. The Fund will concentrate its investments (i.e., invest 25% or more of its total assets) in the space industry and in industries that support, enable, or are otherwise related to space exploration and space-based activities. The concentration of the Fund’s portfolio on these specific industry groups may present more risks than if the portfolio were broadly diversified over numerous groups of industries.
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| Defiance Space Data Center Leaders ETF | IPO, SPAC and De-SPAC Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | IPO, SPAC and De-SPAC Risks. The Fund may invest in securities of companies that have recently completed initial public offerings (“IPOs”), special purpose acquisition companies (“SPACs”), or companies that have become publicly traded through business combinations involving SPACs (“de-SPAC transactions”). These securities may be less seasoned, lack a meaningful trading history, have limited public information and research coverage, and involve risks similar to those of venture capital or other private equity investments. As a result, their prices may be volatile, subject to speculative trading, and susceptible to rapid and substantial declines in value. These securities may have experienced significant price appreciation in connection with an IPO, SPAC transaction or de-SPAC transaction prior to the Fund’s investment, but there can be no assurance that such price performance will continue.
SPACs are shell or blank check companies that raise capital in an IPO for the purpose of identifying and completing a business combination with a private operating company. Until a business combination is completed, a SPAC typically invests its assets in U.S. government securities, money market instruments and cash and generally does not conduct substantive business operations, which may result in little or no income. The value of SPAC securities is dependent on the SPAC’s ability to identify and consummate a successful business combination, and there is no guarantee that a SPAC will complete a business combination or that any transaction completed will be successful or yield positive returns. The market’s perception of a SPAC’s prospects, including the likelihood and terms of a business combination, can materially affect the market value of the SPAC’s securities.
Investments in SPACs and securities resulting from de-SPAC transactions involve risks in addition to those associated with traditional IPOs and other equity securities. Conflicts of interest may arise among a SPAC’s sponsors, affiliates, officers, directors, or promoters and unaffiliated security holders, including in connection with decisions whether to proceed with a business combination or the amount and timing of redemptions. A SPAC’s sponsor or related parties may have economic incentives that differ from those of public stockholders. The interests of early investors and sponsors may be reflected in the SPAC’s valuation or structure in ways that do not align with the interests of the Fund or the Fund’s shareholders.
SPAC securities may trade at prices that deviate from their net asset value, may have limited liquidity, and may be subject to significant price fluctuations, including in connection with the release of lock-up restrictions or other transfer restrictions on sponsor or early investor holdings. Dilution of equity interests may occur as a result of redemption activity, sponsor or promoter compensation arrangements, underwriting fees, warrants, convertible securities or financing transactions associated with de-SPAC transactions. Recent regulatory developments require enhanced disclosures regarding SPAC sponsors, conflicts of interest and potential dilution in SPAC IPOs and de-SPAC transactions, and increased investor protections designed to align regulatory treatment more closely with that of traditional IPOs, but these measures may not eliminate the inherent risks of these securities.
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| Defiance Space Data Center Leaders ETF | Illiquid Security Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Illiquid Security Risks. Some securities held by the Fund, including SPACs and de-SPACs, may be difficult to sell or be illiquid, particularly during times of market turmoil. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, it may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses or realizing gains from an investment in an illiquid security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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| Defiance Space Data Center Leaders ETF | Economic and Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Economic and 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), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, 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. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
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| Defiance Space Data Center Leaders ETF | ETF Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risks.
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| Defiance Space Data Center Leaders ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | Cash Redemption Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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. The costs associated with cash redemptions may include brokerage costs that the Fund may not have incurred if it had made the redemptions in-kind. These costs could be imposed on the FundCosts of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
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| Defiance Space Data Center Leaders ETF | Costs of Buying or Selling Shares [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Space Data Center Leaders ETF | Shares May Trade at Prices Other Than NAV [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Space Data Center Leaders ETF | Trading [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as The Nasdaq Stock Market, LLC (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.
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| Defiance Space Data Center Leaders ETF | Focused Portfolio Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Focused Portfolio Risk. The Fund will hold a relatively focused portfolio that may contain exposure to the securities of fewer issuers than the portfolios of other ETFs. Holding a relatively concentrated portfolio may increase the risk that the value of the Fund could go down because of the poor performance of one or a few investments.
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| Defiance Space Data Center Leaders ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. 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. Investments in foreign companies’ securities, including investments via depositary receipts, are subject to special risks, including the following:
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| Defiance Space Data Center Leaders ETF | Depositary Receipt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Space Data Center Leaders ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | Inflation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. The Fund’s adviser will apply investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that the Fund will meet its investment objective.
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| Defiance Space Data Center Leaders ETF | Market Capitalization Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Capitalization Risk.
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| Defiance Space Data Center Leaders ETF | Large-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Space Data Center Leaders ETF | Mid-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Space Data Center Leaders ETF | Small-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Space Data Center Leaders ETF | Micro-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Defiance Space Data Center Leaders ETF | New Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | Operational Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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 and the Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.
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| Defiance Space Data Center Leaders ETF | Space Data Center Industry Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Space Data Center Industry Risks. The Fund invests primarily in companies engaged in space-based data processing, storage, transmission, and related orbital infrastructure (“Space Data Center Companies”). These companies are subject to significant technological, operational, regulatory, and market risks. Many Space Data Center Companies have limited operating histories, depend on unproven or developing technologies, and may face challenges in achieving commercial viability, widespread adoption, or sustained profitability. As a result, the Fund may be more volatile and more sensitive to adverse developments affecting this industry than funds that invest in a broader range of industries. Space Data Center Companies rely on the successful development, launch, deployment, and operation of space-based infrastructure, including satellites and in-orbit computing platforms. Launch failures, deployment delays, collisions, space debris, equipment malfunctions, cybersecurity incidents, or loss of orbital assets could disrupt operations, impair revenues, or result in significant financial losses. In-orbit assets may be difficult or impossible to repair or replace, and insurance coverage may be unavailable or insufficient. In addition, rapid technological change and innovation may render existing technologies obsolete or less competitive. Space Data Center Companies are subject to complex and evolving domestic and international regulations, including those related to satellite licensing, spectrum allocation, data transmission, cybersecurity, export controls, and national security. Regulatory changes, geopolitical tensions, or adverse government actions may increase costs, restrict operations, or limit growth opportunities. The industry is also capital intensive and highly competitive, and companies may depend on access to external financing, key suppliers, launch providers, or a limited number of customers or contracts.
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| Defiance Space Data Center Leaders ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | U.S. Government and U.S. Agency Obligations Risk. [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Space Data Center Leaders ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Defiance Space Data Center Leaders ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Pure Space Daily 2X Strategy ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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, leverage, imperfect daily correlations 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 imperfect correlation between the share price of the Target Portfolio 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.
The Fund will be subject to regulatory constraints relating to level of value at risk that the Fund may incur through its derivative portfolio. To the extent the Fund exceeds these regulatory thresholds over an extended period, the Fund may determine that it is necessary to make adjustments to the Fund’s investment strategy, including the desired daily leveraged performance for the Fund.
In addition, the Fund’s investments in derivatives are subject to the following risks:
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| Defiance Pure Space Daily 2X Strategy ETF | Options Contracts [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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. The value of the options contracts in which the Fund invests are substantially influenced by the value of the Target Portfolio. 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 moves 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 as the underlying instrument. There may at times be an imperfect correlation between the movement in values 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. 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. The use of options to generate leverage introduces additional risks, including significant potential losses if the market moves unfavorably. The leverage inherent in options can amplify both gains and losses, leading to increased volatility and potential for substantial losses, particularly in periods of market uncertainty or low liquidity. Additionally, the Fund may incur losses if the value of the Target Portfolio moves against its positions, potentially resulting in a complete loss of the premium paid.
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| Defiance Pure Space Daily 2X Strategy ETF | Swap Agreements [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Swap Agreements. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Target Portfolio, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Target Portfolio has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Target Portfolio later reverses all or a portion of its movement.
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| Defiance Pure Space Daily 2X Strategy ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivatives which exposes the Fund to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
Counterparties may seek to hedge their exposure to individual clients (such as the Fund) by establishing offsetting exposures with other clients, however, there is no guarantee that counterparties will do so under all circumstances. Should a counterparty (e.g., a swap counterparty) terminate its relationship with the Fund, the Fund will seek to utilize other counterparties to seek to maintain its exposures. In addition, the Fund may use options contracts to seek to generate the leverage necessary to implement its strategy. The use of options contracts introduces distinct risks, including heightened volatility, particularly intraday. While options may provide an ancillary benefit of mitigating some losses under specific scenarios, such as severe market downturns, their inherent leverage and rapid price fluctuations can amplify the Fund’s performance volatility and lead to greater risks of substantial losses. Refer to “Derivatives Risk – Options Contracts” for additional information on the risks of investing in options
In addition, the Fund may enter into swap agreements with a limited number of counterparties, which may increase the Fund’s exposure to counterparty credit risk. Further, there is a risk that no suitable counterparties will be willing to enter into, or continue to enter into, transactions with the Fund and, as a result, the Fund may not be able to achieve its investment objective.
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| Defiance Pure Space Daily 2X Strategy ETF | Industry Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Industry Concentration Risk. The Fund will concentrate (i.e., invest 25% or more of its total assets) its investment exposure to companies in the space industry and in industries that develop, deploy, or operate space-related technologies and services. The concentration of the Fund’s portfolio on these specific industry groups may present more risks than if the portfolio were broadly diversified over numerous groups of industries.
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| Defiance Pure Space Daily 2X Strategy ETF | IPO, SPAC and De-SPAC Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | IPO, SPAC and De-SPAC Risks. The Fund may invest indirectly, via derivative instruments, in securities of companies that have recently completed initial public offerings (“IPOs”), special purpose acquisition companies (“SPACs”), or companies that have become publicly traded through business combinations involving SPACs (“de-SPAC transactions”). These securities may be less seasoned, lack a meaningful trading history, have limited public information and research coverage, and involve risks similar to those of venture capital or other private equity investments. As a result, their prices may be volatile, subject to speculative trading, and susceptible to rapid and substantial declines in value. These securities may have experienced significant price appreciation in connection with an IPO, SPAC transaction or de-SPAC transaction prior to the Fund’s investment, but there can be no assurance that such price performance will continue.
SPACs are shell or blank check companies that raise capital in an IPO for the purpose of identifying and completing a business combination with a private operating company. Until a business combination is completed, a SPAC typically invests its assets in U.S. government securities, money market instruments and cash and generally does not conduct substantive business operations, which may result in little or no income. The value of SPAC securities is dependent on the SPAC’s ability to identify and consummate a successful business combination, and there is no guarantee that a SPAC will complete a business combination or that any transaction completed will be successful or yield positive returns. The market’s perception of a SPAC’s prospects, including the likelihood and terms of a business combination, can materially affect the market value of the SPAC’s securities.
Investments in SPACs and securities resulting from de-SPAC transactions involve risks in addition to those associated with traditional IPOs and other equity securities. Conflicts of interest may arise among a SPAC’s sponsors, affiliates, officers, directors, or promoters and unaffiliated security holders, including in connection with decisions whether to proceed with a business combination or the amount and timing of redemptions. A SPAC’s sponsor or related parties may have economic incentives that differ from those of public stockholders. The interests of early investors and sponsors may be reflected in the SPAC’s valuation or structure in ways that do not align with the interests of the Fund or the Fund’s shareholders.
SPAC securities may trade at prices that deviate from their net asset value, may have limited liquidity, and may be subject to significant price fluctuations, including in connection with the release of lock-up restrictions or other transfer restrictions on sponsor or early investor holdings. Dilution of equity interests may occur as a result of redemption activity, sponsor or promoter compensation arrangements, underwriting fees, warrants, convertible securities or financing transactions associated with de-SPAC transactions. Recent regulatory developments require enhanced disclosures regarding SPAC sponsors, conflicts of interest and potential dilution in SPAC IPOs and de-SPAC transactions, and increased investor protections designed to align regulatory treatment more closely with that of traditional IPOs, but these measures may not eliminate the inherent risks of these securities.
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| Defiance Pure Space Daily 2X Strategy ETF | Illiquid Security Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Illiquid Security Risks. Some securities held by the Fund may be difficult to sell or be illiquid, particularly during times of market turmoil. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Target Portfolio. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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| Defiance Pure Space Daily 2X Strategy ETF | Economic and Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Economic and 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), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, 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. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
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| Defiance Pure Space Daily 2X Strategy ETF | ETF Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risks.
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| Defiance Pure Space Daily 2X Strategy ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Pure Space Daily 2X Strategy ETF | Cash Redemption Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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. The costs associated with cash redemptions may include brokerage costs that the Fund may not have incurred if it had made the redemptions in-kind. These costs could be imposed on the Fund, decreasing its NAV, to the extent these costs are not offset by a transaction fee payable by an authorized participant.
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| Defiance Pure Space Daily 2X Strategy ETF | Costs of Buying or Selling Shares [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Defiance Pure Space Daily 2X Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Defiance Pure Space Daily 2X Strategy ETF | Trading [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as Cboe BZX Exchange, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that 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. This adverse effect on liquidity for the Fund’s shares may lead to wider bid-ask spreads and differences between the market price of the Fund’s shares and the underlying value of the shares.
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| Defiance Pure Space Daily 2X Strategy ETF | Focused Portfolio Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Focused Portfolio Risk. The Fund will hold a relatively focused portfolio that may contain exposure to the securities of fewer issuers than the portfolios of other ETFs. Holding a relatively concentrated portfolio may increase the risk that the value of the Fund could go down because of the poor performance of one or a few investments.
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| Defiance Pure Space Daily 2X Strategy ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. 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. Investments in foreign companies’ securities, including investments via depositary receipts, are subject to special risks, including the following:
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| Defiance Pure Space Daily 2X Strategy ETF | Depositary Receipt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Defiance Pure Space Daily 2X Strategy ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. Daily rebalancing of the Fund’s holdings pursuant to its daily investment objective causes a much greater number of portfolio transactions when compared to most ETFs. Additionally, active market trading of the Fund’s Shares on exchanges (such as the Exchange), could cause more frequent creation and redemption activities, which could increase the number of portfolio transactions. Frequent and active trading may lead to higher transaction costs because of increased broker commissions resulting from such transactions. In addition, there is the possibility of significantly increased short-term capital gains (which will be taxable to shareholders as ordinary income when distributed to them). The Fund calculates portfolio turnover without including the short-term cash instruments or derivative transactions that comprise the majority of the Fund’s trading. As such, if the Fund’s extensive use of derivative instruments were reflected, the calculated portfolio turnover rate would be significantly higher.
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| Defiance Pure Space Daily 2X Strategy ETF | Market Capitalization Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Capitalization Risks.
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| Defiance Pure Space Daily 2X Strategy ETF | Large-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Pure Space Daily 2X Strategy ETF | Mid-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Defiance Pure Space Daily 2X Strategy ETF | Small-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Defiance Pure Space Daily 2X Strategy ETF | Micro-Capitalization Investing [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Defiance Pure Space Daily 2X Strategy ETF | New Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Pure Space Daily 2X Strategy ETF | Operational Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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 and the Fund’s investment advisor seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks.
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| Defiance Pure Space Daily 2X Strategy ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment generally available to regulated investment companies, the Fund must satisfy certain diversification and other requirements. In particular, the Fund generally may not acquire a security if, as a result of the acquisition, more than 50% of the value of the Fund’s assets would be invested in (a) issuers in which the Fund has, in each case, invested more than 5% of the Fund’s assets and (b) issuers more than 10% of whose outstanding voting securities are owned by the Fund. The application of these requirements to certain investments (including swaps) that may be entered into by the Fund is unclear. In addition, the application of these requirements to the Fund’s investment objective is not clear. If the Fund were to fail to qualify as a regulated investment company, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income.
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| Defiance Pure Space Daily 2X Strategy ETF | U.S. Government and U.S. Agency Obligations Risk. [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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| Defiance Pure Space Daily 2X Strategy ETF | Compounding and Market Volatility Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Compounding and Market Volatility Risk. The Fund has a daily leveraged investment objective and the Fund’s performance for periods greater than a trading day will be the result of each day’s returns compounded over the period, which is very likely to differ from two times (200%) the Target Portfolio’s performance, before the Fund’s management fee and other expenses. Compounding affects all investments but has a more significant impact on funds that aim to replicate leveraged daily returns and that rebalance daily. For the Fund aiming to replicate two times the daily performance of the Target Portfolio, if adverse daily performance of the Target Portfolio reduces the amount of a shareholder’s investment, any further adverse daily performance will lead to a smaller dollar loss because the shareholder’s investment had already been reduced by the prior adverse performance. Equally, however, if favorable daily performance of the Target Portfolio increases the amount of a shareholder’s investment, the dollar amount lost due to future adverse performance will increase because the shareholder’s investment has increased.
The effect of compounding becomes more pronounced as the Target Portfolio’s volatility and the holding period increase. The impact of compounding will impact each shareholder differently depending on the period of time an investment in the Fund is held and the volatility of the Target Portfolio during a shareholder’s holding period of an investment in the Fund.
The chart below provides examples of how the Target Portfolio’s volatility could affect the Fund’s performance. The chart illustrates the impact of two factors that affect the Fund’s performance – the Target Portfolio’s volatility and the Target Portfolio’s performance. The Target Portfolio’s performance shows the percentage change in the share price of the Target Portfolio over the specified time period, while the Target Portfolio’s volatility is a statistical measure of the magnitude of fluctuations in the returns during that time period. As illustrated below, even if the Target Portfolio’s performance over two equal time periods is identical, different Target Portfolio volatility (i.e., in magnitude of fluctuations in the share price of the Target Portfolio) during the two time periods could result in drastically different Fund performance for the two time periods because of compounding daily returns during the time periods.
Fund performance for periods greater than one single day can be estimated given any set of assumptions for the following factors: a) the Target Portfolio volatility; b) the Target Portfolio performance; c) period of time; d) financing rates associated with leveraged exposure; and e) other Fund expenses. The chart shows estimated Fund returns for a number of combinations of Target Portfolio volatility and Target Portfolio performance over a one-year period. Performance shown in the chart assumes that: (i) there were no Fund expenses; (ii) borrowing/lending rates (to obtain leveraged exposure) of 0%. If Fund expenses and/or actual borrowing/lending rates were reflected the estimated returns would be different than those shown. Particularly during periods of higher Target Portfolio volatility, compounding will cause results for periods longer than a trading day to vary from two times (200%) the performance of the Target Portfolio.
As shown in the chart below, the Fund would be expected to lose 6.1% if there was no change in the share price of the Target Portfolio over a one-year period during which the Target Portfolio experienced annualized volatility of 25%. If the Target Portfolio’s annualized volatility were to rise to 75%, the hypothetical loss for a one-year period would widen to approximately -43%. At higher ranges of volatility, there is a chance of a significant loss of value in the Fund, even if there were no change in the share price of the Target Portfolio. For instance, if the Target Portfolio’s annualized volatility is 100%, the Fund would be expected to lose 63.2% of its value, even if the cumulative Target Portfolio change in the share price of the Target Portfolio for the year was 0%.
Areas shaded red (or dark gray) represent those scenarios where the Fund can be expected to return less than two times (200%) the performance of the Target Portfolio and those shaded green (or light gray) represent those scenarios where the Fund can be expected to return more than two times (200%) the performance of the Target Portfolio. The Fund’s actual performance may be significantly better or worse than the performance shown below as a result of any of the factors discussed above or in the “Daily Correlation/Tracking Risk” below.
Since market volatility has negative implications for the Fund which rebalances its derivatives daily, investors should be sure to monitor and manage their investments in the Fund particularly in volatile markets. The negative implications of volatility in Table 1 can be combined with the recent volatility ranges of the then-current Target Portfolio’s historical volatility, which are expected to be high. Historical volatility and performance for the underlying securities are not likely indicative of future volatility and performance.
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| Defiance Pure Space Daily 2X Strategy ETF | Space Investing Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Space Investing Risks. The Fund invests indirectly in companies that derive a substantial portion of their revenues or operating activities from space-related technologies and services and, as a result, is subject to risks associated with companies engaged in the space industry and the broader space economy, which may cause the Fund’s investments to be more volatile than those of more diversified funds. Companies involved in the design, manufacture, or launch of spacecraft, launch vehicles, or related systems face significant risks associated with launch failures, deployment malfunctions, mission delays, and cost overruns; space launches are inherently complex and costly, and failures may result in the total loss of spacecraft or payloads, substantial financial losses, reputational harm, increased regulatory scrutiny, and adverse impacts on a company’s financial condition and stock price. Pure space-related businesses often rely on advanced, emerging, or unproven technologies and may be adversely affected by rapid technological change, engineering challenges, design flaws, the inability to achieve expected performance, or competitors’ development of superior or lower-cost technologies. The space industry is subject to extensive domestic and international regulation (including licensing requirements, export controls, national security restrictions, environmental regulation, and orbital debris mitigation standards), and changes in laws, regulations, or regulatory interpretations may increase compliance costs, delay operations, restrict market access, or limit the deployment or operation of space-based systems. Many space-focused companies depend on governmental or quasi-governmental customers and contracts, and reductions in government budgets, policy changes, contract terminations, delays, or failures to renew contracts could materially and adversely affect revenues and financial performance. Space-based operations are exposed to risks arising from orbital debris, collisions, congestion in Earth’s orbits, and space weather (including solar activity), any of which may damage satellites or spacecraft and result in service disruptions, data loss, reduced operational lifespans, or complete mission failure. The space economy is evolving, and many companies may have limited operating histories, depend on a narrow set of products or services, or rely on a small number of customers or missions for a substantial portion of revenues; delays in commercialization or failure to achieve anticipated adoption of space-based services may adversely affect profitability and valuations. The space industry is highly competitive and characterized by rapid innovation; increased competition may lead to pricing pressure, reduced market share, or higher research and development costs. Many space-focused companies rely on governmental or quasi-governmental customers and contracts, and adverse changes in government policy or budgets could materially affect revenues. The Fund may have exposure to foreign issuers (including through ADRs or securities listed on non-U.S. exchanges), which can involve political instability, geopolitical tensions, trade restrictions, sanctions, differing regulatory regimes, and currency fluctuations that may disrupt supply chains, restrict access to launch facilities or markets, or impair cross-border collaboration. Because the Fund focuses on space-related activities, it is more susceptible to adverse developments affecting the space industry, including technological setbacks, regulatory actions, or declines in investor sentiment toward space-related investments. In addition, when the Adviser determines there are insufficient Pure Space Companies to meet the Fund’s investment criteria, the Fund may obtain exposure to secondary space technology companies that support or enable space-related activities, which may be less directly exposed to the growth of the space economy and may be more sensitive to broader industry or market risks, causing their performance to diverge from that of Pure Space Companies.
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| Defiance Pure Space Daily 2X Strategy ETF | Daily Correlation/Tracking Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Daily Correlation/Tracking Risk. There is no guarantee that the Fund will achieve a high degree of leveraged correlation to the Target Portfolio and therefore achieve its daily leveraged investment objective. To achieve a high degree of leveraged correlation with the Target Portfolio, the Fund seeks to rebalance its portfolio daily to keep exposure consistent with its daily leveraged investment objective. The possibility of the Fund being materially over- or under-exposed to the Target Portfolio increases on days when the Target Portfolio is volatile near the close of the trading day. Additionally, if securities within the Target Portfolio exhibit unexpected or heightened correlations, the Fund’s ability to achieve its daily investment objective may be adversely impacted as overlapping exposures may reduce potential diversification benefits and amplify the effects of market movements. Market disruptions, regulatory restrictions and extreme volatility will also adversely affect the Fund’s ability to adjust exposure to the required levels. If there is a significant intra-day market event and/or the Target Portfolio experiences a significant increase or decline, the Fund may not meet its investment objective, be able to rebalance its portfolio appropriately, or may experience significant premiums or discounts, or widened bid-ask spreads.
The Fund may have difficulty achieving its daily leveraged investment objective due to fees, expenses, transaction costs, financing costs related to the use of derivatives, investments in ETFs, directly or indirectly, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or derivatives held by the Fund. The Fund may also be impacted by large movements of assets into and out of the Fund, potentially resulting in the Fund being over- or under-exposed to the Target Portfolio. The Fund may take or refrain from taking positions to improve the tax efficiency or to comply with various regulatory restrictions, either of which may negatively impact the Fund’s leveraged correlation to the Target Portfolio. Finally, during periods of high volatility, compounding effects and correlation shifts between securities in the Target Portfolio may cause the Fund’s returns to deviate materially from two times (2X) the daily performance of the Target Portfolio.
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| Defiance Pure Space Daily 2X Strategy ETF | Leverage Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Leverage Risk. The Fund obtains investment exposure in excess of its net assets by utilizing leverage and may lose more money in market conditions that are adverse to its investment objective than a fund that does not utilize leverage. An investment in the Fund is exposed to the risk that a decline in the daily performance of the Target Portfolio will be magnified. This means that an investment in the Fund will be reduced by an amount equal to 2% for every 1% daily decline in the share price of the Target Portfolio, not including the costs of financing leverage and other operating expenses, which would further reduce its value. The Fund could theoretically lose an amount greater than its net assets in the event the share price of the Target Portfolio declines more than 50%. Leverage will also have the effect of magnifying any differences in the Fund performance’s correlation with the Target Portfolio’s share price.
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| Defiance Pure Space Daily 2X Strategy ETF | Intra-Day Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Intra-Day Investment Risk. The Fund seeks investment results from the close of the market on a given trading day until the close of the market on the subsequent trading day. The exact exposure of an investment in the Fund intraday in the secondary market is a function of the difference between the market value of the Target Portfolio at the market close on the first trading day and the market value of the Target Portfolio at the time of purchase. If the market value of the Target Portfolio rises, the Fund’s net assets will rise by approximately twice the amount as the Fund’s exposure. Conversely, if the market value of the Target Portfolio declines, the Fund’s net assets will decline by approximately two times the amount as the Fund’s exposure. Thus, an investor that purchases Shares intra-day may experience performance that is greater than, or less than, the Fund’s stated leveraged performance of the Target Portfolio.
If there is a significant intra-day market event and/or the securities of the Target Portfolio experience a significant increase or decrease, the Fund may not meet its investment objective or rebalance its portfolio appropriately.
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| Defiance Pure Space Daily 2X Strategy ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. When the Fund invests in fixed income securities, the value of your investment in the Fund will fluctuate with changes in interest rates. Typically, a rise in interest rates causes a decline in the value of fixed income securities owned by the Fund. In general, the market price of fixed income securities with longer maturities will increase or decrease more in response to changes in interest rates than shorter-term securities. Other risk factors include credit risk (the debtor may default), extension risk (an issuer may exercise its right to repay principal on a fixed rate obligation held by the Fund later than expected), and prepayment risk (the debtor may pay its obligation early, reducing the amount of interest payments). These risks could affect the value of a particular investment by the Fund, possibly causing the Fund’s Share price and total return to be reduced and fluctuate more than other types of investments.
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| Defiance Pure Space Daily 2X Strategy ETF | Rebalancing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Rebalancing Risk. If for any reason the Fund is unable to rebalance all or a portion of its portfolio, or if all or a portion of the portfolio is rebalanced incorrectly, the Fund’s investment exposure may not be consistent with the Fund’s investment objective. In these instances, the Fund may have investment exposure to the Target Portfolio that is significantly greater or less than its stated investment objective. As a result, the Fund may be exposed to leverage risk because it had not been properly rebalanced and may not achieve its investment objective.
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| Defiance Pure Space Daily 2X Strategy ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. In certain circumstances, such as the disruption of the orderly markets for the financial instruments in which the Fund invests, the Fund might not be able to acquire or dispose of certain holdings quickly or at prices that represent true market value in the judgment of the Adviser. Markets for the financial instruments in which the Fund invests may be disrupted by a number of events, including but not limited to economic crises, health crises, natural disasters, excessive volatility, new legislation, or regulatory changes inside or outside of the U.S. These situations may have an impact on the liquidity of the Fund’s own shares.
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| Defiance Pure Space Daily 2X Strategy ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. Tracking error is the divergence of the Fund’s performance from that of its investment objective which aims to replicate two times the daily percentage change in the price of the Target Portfolio. Tracking error may occur for a number of reasons. Tracking error may occur because of transaction costs, the Fund’s holding of cash, differences in accrual of dividends, being under- or overexposed to the Target Portfolio or the need to meet new or existing regulatory requirements. Tracking error risk may be heightened during times of market volatility or other unusual market conditions such as market disruptions. The Fund may be required to deviate from its investment objectives, and therefore experience tracking error, as a result of market restrictions or other legal reasons, including regulatory limits or other restrictions on securities that may be purchased by the Adviser and its affiliates.
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| Defiance Pure Space Daily 2X Strategy ETF | Models and Data Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Models and Data Risk. The composition of the Fund’s portfolio is heavily dependent on investment models as well as information and data supplied by third parties (“Models and Data”). When Models and Data prove to be incorrect or incomplete, any decisions made in reliance thereon may lead to the inclusion or exclusion of securities from the Fund’s portfolio that would have been excluded or included had the Models and Data been correct and complete. Errors in programming, data entry, system compatibility, or database integrity can result in the unintended inclusion or exclusion of securities in the Fund’s portfolio. Such errors, whether due to human or technological factors, could induce the Adviser to make investment choices that would not have been made with accurate and complete information, potentially leading to losses or missed gains for the Fund.
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| Defiance Pure Space Daily 2X Strategy ETF | Money Market Instrument Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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 may lose money.
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| Defiance Pure Space Daily 2X Strategy ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Defiance Pure Space Daily 2X Strategy ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | 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.
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