v3.25.4
Investment Risks
Mar. 01, 2026
Feb. 28, 2026
CastleArk Large Growth ETF | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk – The risk that stock prices will fall over short or extended periods of time, sometimes rapidly and unpredictably. The value of equity securities will fluctuate in response to factors affecting a particular company, as well as broader market and economic conditions. Broad movements in financial markets may adversely affect the price of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. A variety of factors can lead to volatility in local, regional, or global markets,

including regulatory events, inflation, interest rates, government defaults, government shutdowns, war, regional conflicts, acts of terrorism, social unrest, the imposition of tariffs, trade disputes, and substantial economic downturn or recessions. Moreover, in the event of a company’s bankruptcy, claims of certain creditors, including bondholders, will have priority over claims of common stock holders such as the Fund.

CastleArk Large Growth ETF | Market Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Market Risk – The prices of and the income generated by the Fund’s securities may decline in response to, among other things, investor sentiment, general economic and market conditions, regional or global instability, and currency and interest rate fluctuations. In addition, the impact of any epidemic, pandemic or natural disaster, or widespread fear that such events may occur, could negatively affect the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the markets in general in significant and unforeseen ways. Any such impact could adversely affect the prices and liquidity of the securities and other instruments in which the Fund invests, which in turn could negatively impact the Fund’s performance and cause losses on your investment in the Fund. Market risk may affect a single issuer, an industry, a sector or the equity or bond market as a whole.

CastleArk Large Growth ETF | Non-Diversification Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Non-Diversification Risk – The Fund is non-diversified, which means that it may invest in the securities of fewer issuers than a diversified fund. As a result, the Fund may be more susceptible to a single adverse corporate, economic or political occurrence affecting one or more of these issuers, and may experience increased volatility due to its investments in those securities.

CastleArk Large Growth ETF | Sector Focus Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Sector Focus Risk – Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a fund that invests in a broader range of sectors.

CastleArk Large Growth ETF | Growth Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Growth Investment Style Risk – A growth investment style may increase the risks of investing in the Fund. If a growth company does not meet these expectations, the price of its stock may decline significantly, even if it has increased earnings. Many growth companies do not pay dividends. Companies that do not pay dividends often have greater stock price declines during market downturns. Over time, a growth investing style may go in and out of

favor, and when out of favor, may cause the Fund to underperform other funds that use differing investing styles.

CastleArk Large Growth ETF | Mid-Capitalization Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Mid-Capitalization Company Risk – The Fund is also subject to the risk that medium-capitalization stocks may underperform other segments of the equity market or the equity market as a whole. The medium-sized companies the Fund invests in may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, investments in these medium-sized companies may pose additional risks, including liquidity risk, because these companies tend to have limited product lines, markets and financial resources, and may depend upon a relatively small management group. Therefore, mid-capitalization stocks may be more volatile than those of larger companies. These securities may be traded over-the-counter or listed on an exchange.

CastleArk Large Growth ETF | Large Capitalization Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Large-Capitalization Company Risk – The large capitalization companies in which the Fund may invest may lag the performance of smaller capitalization companies because large capitalization companies may experience slower rates of growth than smaller capitalization companies and may not respond as quickly to market changes and opportunities.

CastleArk Large Growth ETF | Portfolio Turnover Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Portfolio Turnover Risk – Due to its investment strategy, the Fund may buy and sell securities frequently. This may result in higher transaction costs and additional capital gains tax liabilities, which may affect the Fund’s performance.

CastleArk Large Growth ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk – The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s portfolio securities, the Sub-Adviser will apply investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that these will produce the desired results.

CastleArk Large Growth ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks – The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

 

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Trading Risk – Shares of the Fund may trade on the Exchange above (premium) or below (discount) their net asset value (“NAV”). In stressed market conditions, the market for Fund shares may become less liquid in response to deteriorating liquidity in the markets for the Fund’s underlying portfolio holdings, which may increase the variance between the market price of the Fund shares and the value of its underlying holdings. In addition, although the Fund’s shares are currently

listed on the Exchange, there can be no assurance that an active trading market for Fund shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

 

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Limited Authorized Participants, Market Makers and Liquidity Providers Risk – Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. Retail investors cannot transact directly with the Fund. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace to transact in Fund shares. As a result of these and other considerations, Fund shares may trade at a material discount to its NAV. In addition, the Fund may face possible delisting if: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

CastleArk Large Growth ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block]   As with all funds, a shareholder is subject to the risk that his or her investment could lose money.
CastleArk Large Growth ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block]   A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.
Frontier Asset Absolute Return ETF | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk - Since it purchases equity securities, the Fund is subject to the risk that stock prices may fall over short or extended periods of time. Historically, the equity market has moved in cycles, and the value of the Fund’s securities may fluctuate from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. A variety of factors can lead to volatility in local, regional, or global markets, including regulatory events, inflation, interest rates, government defaults, government shutdowns, war, regional conflicts, acts of terrorism, social unrest, the imposition of tariffs, trade disputes, and substantial economic downturn or recessions. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

Frontier Asset Absolute Return ETF | Large Capitalization Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Large Capitalization Company Risk - The large capitalization companies in which the Fund may invest may lag the performance of smaller capitalization companies because large capitalization companies may experience slower rates of growth than smaller capitalization companies and may not respond as quickly to market changes and opportunities.

Frontier Asset Absolute Return ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk - The Fund is subject to the risk that the Adviser’s judgments about the attractiveness, value, or potential appreciation of the Fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the Fund fail to produce the intended results, the Fund could underperform in comparison to its

benchmark index or other funds with similar objectives and investment strategies.

Frontier Asset Absolute Return ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks - The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk - Shares of the Fund may trade on the Exchange above or below their NAV. The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Cash Transactions Risk - Like other ETFs, the Fund sells and redeems its shares only in large blocks called Creation Units and only to “Authorized Participants.” Unlike many other ETFs, however, the Fund expects to effect its creations and redemptions at least partially for cash, rather than in-kind securities. Thus, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. As a result, the Fund may pay out higher capital gains distributions than ETFs that redeem in-kind. Further, paying redemption proceeds at least partially in cash rather than through in-kind delivery of portfolio securities may require the Fund to dispose of or sell portfolio investments to obtain the cash needed to distribute redemption proceeds at an inopportune time.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk - Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount

to net asset value (“NAV”) and possibly face delisting: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

Frontier Asset Absolute Return ETF | Small- and Mid-Capitalization Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Small- and Mid-Capitalization Company Risk - The small- and mid-capitalization companies in which the Fund may invest may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, investments in these small- and mid-sized companies may pose additional risks, including liquidity risk, because these companies tend to have limited product lines, markets and financial resources, and may depend upon a relatively small management group. Therefore, small- and mid-cap stocks may be more volatile than those of larger companies. These securities may be traded over-the-counter or listed on an exchange.

Frontier Asset Absolute Return ETF | Preferred Stock Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Preferred Stock Risk - Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.

Frontier Asset Absolute Return ETF | Convertible Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Convertible Securities Risk - The value of a convertible security is influenced by changes in interest rates (with investment value declining as interest rates increase and increasing as interest rates decline) and the credit standing of the issuer. The price of a convertible security will also normally vary in some proportion to changes in the price of the underlying common stock because of the conversion or exercise feature.

Frontier Asset Absolute Return ETF | REITs Risk    
Prospectus [Line Items]    
Risk [Text Block]  

REITs Risk - REITs are pooled investment vehicles that own, and usually operate, income-producing real estate. REITs are susceptible to the risks associated with direct ownership of real estate, such as the following: declines in property values; increases in property taxes, operating expenses, interest rates or competition; overbuilding; zoning changes; and losses from casualty or condemnation. REITs typically incur fees that are separate from those of the Fund. Accordingly, the Fund’s investments in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs’ operating expenses, in addition to paying Fund expenses. REIT operating expenses are not reflected in the fee table and example in this prospectus.

Frontier Asset Absolute Return ETF | Investment in Other Investment Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investment in Other Investment Companies Risk - Because the Fund invests in other investment companies, such as ETFs, the Fund will be subject to substantially the same risks as those associated with the direct ownership of the securities held by such other investment companies. As a shareholder of another investment company, the Fund relies on that investment company to achieve its investment objective.

  

If the investment company fails to achieve its objective, the value of the Fund’s investment could decline, which could adversely affect the Fund’s performance. By investing in another investment company, Fund shareholders indirectly bear the Fund’s proportionate share of the fees and expenses of the other investment company, in addition to the fees and expenses that Fund shareholders directly bear in connection with the Fund’s own operations. The Fund does not intend to invest in other investment companies unless the Adviser believes that the potential benefits of the investment justify the payment of any additional fees or expenses. Federal securities laws impose limitations on the Fund’s ability to invest in other investment companies.

Frontier Asset Absolute Return ETF | Fixed-Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Fixed-Income Securities Risk - The prices of the Fund’s fixed-income securities respond to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments and their agencies. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and vice versa. In a low interest rate environment, risks associated with rising rates are heightened. Declines in dealer market-making capacity as a result of structural or regulatory changes could decrease liquidity and/or increase volatility in the fixed-income markets.

Frontier Asset Absolute Return ETF | Commodities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commodities Risk - Commodities include, among other things, energy products, agricultural products, metals and oil. The value of commodity-linked investments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or sectors affecting a particular industry or commodity, such as drought, floods, weather, livestock disease, embargoes, tariffs and international economic, political and regulatory developments. The prices of energy, metals, oil, and agriculture sector commodities may fluctuate widely due to factors such as changes in value, supply and demand and governmental regulatory policies.

Frontier Asset Absolute Return ETF | Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Currency Risk - The Fund may have exposure to foreign currencies. Foreign currencies may decline in value relative to the U.S. dollar, resulting in the dollar value of an investment in the Fund being adversely affected. Currency exchange rates may fluctuate in response to, among other things, changes in interest rates, intervention (or failure to intervene) by U.S. or foreign governments or central banks, or by the imposition of currency controls or other political developments in the United States or abroad. Currency exchange rates may fluctuate in response to factors extrinsic to that country’s economy, which makes the forecasting of currency market movements extremely difficult.

Frontier Asset Absolute Return ETF | Derivatives Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Derivatives Risk - An underlying ETF’s use of futures contracts and swaps is subject to market risk, leverage risk, correlation risk and liquidity risk. Market risk is the risk that the market value of an investment may move up and down, sometimes rapidly and unpredictably. Leverage risk is the risk that since derivatives may be purchased for a fraction of

their value, a relatively small price movement in a derivative may result in an immediate and substantial loss or gain for the underlying ETF. Correlation risk is the risk that changes in the value of the derivative may not correlate perfectly or at all with the underlying asset, rate or index. Liquidity risk is the risk that certain securities may be difficult or impossible to sell at the time and the price that the underlying ETF would like. Swaps are also subject to credit risk and valuation risk. Credit risk is the risk that the counterparty to a derivative contract will default or otherwise become unable to honor a financial obligation. Valuation risk is the risk that a security may be difficult to value. Each of these risks could cause an underlying ETF in which the Fund invests to lose more than the principal amount invested in a derivative instrument, which in turn could cause losses for the Fund.

Frontier Asset Absolute Return ETF | Interest Rate Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Interest Rate Risk - The risk that a change in interest rates will cause a fall in the value of fixed-income securities, including U.S. Government securities, in which the Fund invests. Generally the value of the Fund’s fixed income securities will vary inversely with the direction of prevailing interest rates. Changing interest rates may have unpredictable effects on the markets and may affect the value and liquidity of instruments held by the Fund.

Frontier Asset Absolute Return ETF | High Yield Bond Risk    
Prospectus [Line Items]    
Risk [Text Block]  

High Yield Bond Risk - High yield, or “junk,” bonds are debt securities rated below investment grade. High yield bonds are speculative, involve greater risks of default, downgrade, or price declines and are more volatile and tend to be less liquid than investment-grade securities. Companies issuing high yield bonds are less financially strong, are more likely to encounter financial difficulties, and are more vulnerable to adverse market events and negative sentiments than companies with higher credit ratings.

Frontier Asset Absolute Return ETF | Non-U.S. Government Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Non-U.S. Government Securities Risk - Foreign sovereign debt securities are subject to the risks that: (i) the governmental entity that controls the repayment of sovereign debt may not be willing or able to repay the principal and/or interest when it becomes due, due to factors such as debt service burden, political constraints, cash flow problems and other national economic factors; (ii) governments may default on their debt securities, which may require holders of such securities to participate in debt rescheduling or additional lending to defaulting governments; and (iii) there is no bankruptcy proceeding by which defaulted sovereign debt may be collected in whole or in part.

Frontier Asset Absolute Return ETF | Corporate Fixed Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Corporate Fixed Income Securities Risk - Corporate fixed-income securities are fixed-income securities issued by public and private businesses. Corporate fixed-income securities respond to economic

developments, especially changes in interest rates, as well as perceptions of the creditworthiness and business prospects of individual issuers. Corporate fixed income securities are subject to the risk that the issuer may not be able to pay interest or, ultimately, to repay principal upon maturity. Interruptions or delays of these payments could adversely affect the market value of the security.

Frontier Asset Absolute Return ETF | Commercial Paper Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commercial Paper Risk - Commercial paper is a short-term obligation with a maturity generally ranging from one to 270 days and is issued by U.S. or foreign companies or other entities in order to finance their current operations. Such investments are unsecured and usually discounted from their value at maturity. The value of commercial paper may be affected by changes in the credit rating or financial condition of the issuing entities and will tend to fall when interest rates rise and rise when interest rates fall. Asset-backed commercial paper may be issued by structured investment vehicles or other conduits that are organized to issue the commercial paper and to purchase trade receivables or other financial assets. The repayment of asset-backed commercial paper depends primarily on the cash collections received from such an issuer’s underlying asset portfolio and the issuer’s ability to issue new asset-backed commercial paper.

Frontier Asset Absolute Return ETF | Credit Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Credit Risk - The risk that the issuer of a security or the counterparty to a contract will default or otherwise become unable to honor a financial obligation.

Frontier Asset Absolute Return ETF | U.S. Government Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

U.S. Government Securities Risk - Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Obligations issued by some U.S. Government agencies are backed by the U.S. Treasury, while others are backed solely by the ability of the agency to borrow from the U.S. Treasury or by the agency’s own resources.

Frontier Asset Absolute Return ETF | Foreign Government Agencies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Government Agencies Risk - Bonds issued by government agencies, subdivisions or instrumentalities of foreign governments are generally backed only by the general creditworthiness and reputation of the entity issuing the bonds and may not be backed by the full faith and credit of the foreign government. Moreover, a foreign government that explicitly provides its full faith and credit to a particular entity may be, due to changed circumstances, unable or unwilling to provide that support. A foreign government agency’s operations and financial condition are influenced by the foreign government’s economic and other policies.

Frontier Asset Absolute Return ETF | Municipal Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Municipal Securities Risk - Municipal securities, like other fixed income securities, rise and fall in value in response to economic and market factors, primarily changes in interest rates, and actual or perceived credit quality. Rising interest rates will generally cause municipal securities to decline in value. Longer-term securities respond more sharply to interest rate changes than do shorter-term securities. A municipal security will also lose value if, due to rating downgrades or other factors, there are concerns about the issuer’s current or future ability to make principal or interest payments.

Frontier Asset Absolute Return ETF | Residential Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Residential Mortgage-Backed Securities Risk - Mortgage-backed securities are fixed income securities representing an interest in a pool of underlying mortgage loans. Mortgage-backed securities are sensitive to changes in interest rates, but may respond to these changes differently from other fixed income securities due to the possibility of prepayment of the underlying mortgage loans. As a result, it may not be possible to determine in advance the actual maturity date or average life of a mortgage-backed security. Rising interest rates tend to discourage re-financings, with the result that the average life and volatility of the security will increase, exacerbating its decrease in market price. When interest rates fall, however, mortgage-backed securities may not gain as much in market value because of the expectation of additional mortgage prepayments, which must be reinvested at lower interest rates.

Frontier Asset Absolute Return ETF | Commercial Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commercial Mortgage-Backed Securities Risk - Commercial mortgage-backed securities include securities that reflect an interest in, and are secured by, mortgage loans on commercial real property. Many of the risks of investing in commercial mortgage-backed securities reflect the risks of investing in the real estate securing the underlying mortgage loans. These risks reflect the effects of local and other economic conditions on real estate markets, the ability of tenants to make loan payments, and the ability of a property to attract and retain tenants. Commercial mortgage-backed securities may be less liquid and exhibit greater price volatility than other types of mortgage- or asset-backed securities.

Frontier Asset Absolute Return ETF | Prepayment and Extension Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Prepayment and Extension Risk - When interest rates fall, issuers of high interest debt obligations may pay off the debts earlier than expected (prepayment risk), and the Fund may have to reinvest the proceeds at lower yields. When interest rates rise, issuers of lower interest debt obligations may pay off the debts later than expected (extension risk), thus keeping the Fund’s assets tied up in lower interest debt obligations.

Frontier Asset Absolute Return ETF | Asset-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Asset-Backed Securities Risk - Asset-backed securities are securities backed by non-mortgage assets such as company receivables, truck

and auto loans, leases and credit card receivables. Asset-backed securities may be issued as pass-through certificates, which represent undivided fractional ownership interests in the underlying pools of assets. Payment of principal and interest on asset-backed securities is dependent largely on the cash flows generated by the assets backing the securities, and asset-backed securities may not have the benefit of any security interest in the related assets.

Frontier Asset Absolute Return ETF | Inflation Linked Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Inflation Linked Securities Risk - Inflation linked securities, including TIPS, are fixed income securities for which the principal and/or interest income paid is linked to inflation rates. The relationship between an inflation linked security and its associated inflation index affects both the sum the Fund is paid when the security matures and the amount of interest that the security pays the Fund. With inflation (a rise in the index), the principal of the security increases. With deflation (a drop in the index), the principal of the security decreases. Inflation protected securities pay interest at a fixed rate. Because the rate is applied to the adjusted principal, however, interest payments can vary in amount from one period to the next. If inflation occurs, the interest payment increases. In the event of deflation, the interest payment decreases. At the maturity of a security, the Fund receives the adjusted principal or the original principal, whichever is greater.

Frontier Asset Absolute Return ETF | Foreign Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Company Risk - Investing in foreign companies poses additional risks since political and economic events unique to a country or region will affect those markets and their issuers. Securities of foreign companies may not be registered with the U.S. Securities and Exchange Commission (the “SEC”) and foreign companies are generally not subject to the same level of regulatory controls imposed on U.S. issuers. Income from foreign securities owned by the Fund may be reduced by a withholding tax at the source, which tax would reduce income received from the securities comprising the Fund’s portfolio. Foreign securities may also be more difficult to value than securities of U.S. issuers and foreign markets and securities may be less liquid. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund.

Frontier Asset Absolute Return ETF | Emerging Markets Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Emerging Markets Securities Risk - Investments in emerging markets securities are considered speculative and subject to heightened risks in addition to the general risks of investing in foreign securities. Unlike more established markets, emerging markets may have governments that are less stable, markets that are less liquid and economies that are less developed. In addition, the securities markets of emerging market

countries may consist of companies with smaller market capitalizations and may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; and possible restrictions on repatriation of investment income and capital. Furthermore, foreign investors may be required to register the proceeds of sales, and future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization or creation of government monopolies.

Frontier Asset Absolute Return ETF | Foreign Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Currency Risk - As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, in which case, the dollar value of an investment in the Fund would be adversely affected.

Frontier Asset Absolute Return ETF | Bank Loans Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Bank Loans Risk - Investments in bank loans (through both assignments and participations) are generally subject to the same risks as investments in other types of debt instruments, including, in many cases, investments in high yield bonds. There may be limited public information available regarding bank loans and bank loans may be difficult to value. If the Fund holds a bank loan through another financial institution, or relies on a financial institution to administer the loan, its receipt of principal and interest on the loan may be subject to the credit risk of that financial institution. It is possible that collateral securing a loan, if any, may be insufficient or unavailable to the Fund, and that the Fund’s rights to collateral may be limited by bankruptcy or insolvency laws. Bank loans may not be considered “securities,” and purchasers, such as the Fund, therefore may not be entitled to rely on the anti-fraud protections of the federal securities laws.

Frontier Asset Absolute Return ETF | Collateralized Loan Obligations CLOs Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Collateralized Loan Obligations (“CLOs”) Risk - Collateralized loan obligations are generally subject to credit, interest rate, prepayment and extension, valuation and liquidity risks, which are described elsewhere in this section. These securities also are subject to risk of default on the underlying asset, particularly during periods of economic downturn. CLOs carry additional risks including, but not limited to, (i) the possibility that distributions from collateral securities will not be adequate to make interest of other payments, (ii) the collateral may decline in value or default, (iii) the Fund may invest in obligations that are subordinate to other classes, and (iv) the complex structure of the security may not be fully understood at the time of investment and produce disputes with the issuer or unexpected investment results.

Frontier Asset Absolute Return ETF | Collateralized Mortgage Obligations CMOs Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Collateralized Mortgage Obligations (“CMOs”) Risk - CMOs exhibit similar risks to those of mortgage-backed securities but also present certain special risks. CMOs are created by dividing the principal and interest payments collected on a pool of mortgages into several revenue streams (“tranches”) with different priority rights to portions of the underlying mortgage payments. As market conditions change, however, particularly during periods of rapid or unanticipated changes in interest rates, the ability of a CMO tranche to provide the anticipated investment characteristics and performance may be significantly reduced. These changes may result in volatility in the market value, and in some instances reduced liquidity, of the CMO tranche.

Frontier Asset Absolute Return ETF | Money Market Instruments Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Money Market Instruments Risk - The value of money market instruments may be affected by changing interest rates and by changes in the credit ratings of the investments. An investment in a money market fund is not a bank deposit and is not insured or guaranteed by any bank, the FDIC or any other government agency. Certain money market funds float their net asset value while others seek to preserve the value of investments at a stable net asset value (typically, $1.00 per share). An investment in a money market fund, even an investment in a fund seeking to maintain a stable net asset value per share, is not guaranteed and it is possible for the Fund to lose money by investing in these and other types of money market funds. The regulations governing money market funds were recently amended in July, 2023, and their implementation and interpretation, as well as enforcement, may affect the manner of operation, performance and/or yield of money market funds.

Frontier Asset Absolute Return ETF | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk - Certain securities may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

Frontier Asset Absolute Return ETF | Valuation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Valuation Risk - The risk that a security may be difficult to value. The Fund may value certain securities at a price higher or lower than the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.

Frontier Asset Absolute Return ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] As with all funds, a shareholder is subject to the risk that his or her investment could lose money.  
Frontier Asset Absolute Return ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.  
Frontier Asset Core Bond ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk - The Fund is subject to the risk that the Adviser’s judgments about the attractiveness, value, or potential appreciation of the Fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the Fund fail to produce the intended results, the Fund could underperform in comparison to its benchmark index or other funds with similar objectives and investment strategies.

Frontier Asset Core Bond ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks - The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk - Shares of the Fund may trade on the Exchange above or below their NAV. The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Cash Transactions Risk - Like other ETFs, the Fund sells and redeems its shares only in large blocks called Creation Units and only to “Authorized Participants.” Unlike many other ETFs, however, the Fund expects to effect its creations and redemptions at least partially for cash, rather than in-kind securities. Thus, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. As a result, the Fund may pay out higher capital gains distributions than ETFs that redeem in-kind. Further, paying redemption proceeds at least partially in cash rather than through in-kind delivery of portfolio securities may require the Fund to dispose of or sell portfolio investments to obtain the cash needed to distribute redemption proceeds at an inopportune time.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk - Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount to net asset value (“NAV”) and possibly face delisting: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

Frontier Asset Core Bond ETF | Investment in Other Investment Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investment in Other Investment Companies Risk - Because the Fund invests in other investment companies, such as ETFs, the Fund will be subject to substantially the same risks as those associated with the direct ownership of the securities held by such other investment companies. As a shareholder of another investment company, the Fund relies on that investment company to achieve its investment objective. If the investment company fails to achieve its objective, the value of the Fund’s investment could decline, which could adversely affect the Fund’s performance. By investing in another investment company, Fund shareholders indirectly bear the Fund’s proportionate share of the fees and expenses of the other investment company, in addition to the fees and expenses that Fund shareholders directly bear in connection with the Fund’s own operations. The Fund does not intend to invest in other investment companies unless the Adviser believes that the potential benefits of the investment justify the payment of any additional fees or expenses. Federal securities laws impose limitations on the Fund’s ability to invest in other investment companies.

Frontier Asset Core Bond ETF | Fixed-Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Fixed-Income Securities Risk - The prices of the Fund’s fixed-income securities respond to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments and their agencies. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and vice versa. In a low interest rate environment, risks associated with rising rates are heightened. Declines in dealer market-making capacity as a result of structural or regulatory changes could decrease liquidity and/or increase volatility in the fixed-income markets.

Frontier Asset Core Bond ETF | Interest Rate Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Interest Rate Risk - The risk that a change in interest rates will cause a fall in the value of fixed-income securities, including U.S. Government securities, in which the Fund invests. Generally the value of the Fund’s fixed income securities will vary inversely with the direction of prevailing interest rates. Changing interest rates may have unpredictable effects on the markets and may affect the value and liquidity of instruments held by the Fund.

Frontier Asset Core Bond ETF | Corporate Fixed Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Corporate Fixed Income Securities Risk - Corporate fixed-income securities are fixed-income securities issued by public and private businesses. Corporate fixed-income securities respond to economic developments, especially changes in interest rates, as well as perceptions of the creditworthiness and business prospects of individual issuers. Corporate fixed income securities are subject to the risk that the issuer may not be able to pay interest or, ultimately, to repay principal upon maturity. Interruptions or delays of these payments could adversely affect the market value of the security.

Frontier Asset Core Bond ETF | Commercial Paper Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commercial Paper Risk - Commercial paper is a short-term obligation with a maturity generally ranging from one to 270 days and is issued by U.S. or foreign companies or other entities in order to finance their current operations. Such investments are unsecured and usually discounted from their value at maturity. The value of commercial paper may be affected by changes in the credit rating or financial condition of the issuing entities and will tend to fall when interest rates rise and rise when interest rates fall. Asset-backed commercial paper may be issued by structured investment vehicles or other conduits that are organized to issue the commercial paper and to purchase trade receivables or other financial assets. The repayment of asset-backed commercial paper depends primarily on the cash collections received from such an

issuer’s underlying asset portfolio and the issuer’s ability to issue new asset-backed commercial paper.

Frontier Asset Core Bond ETF | Credit Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Credit Risk - The risk that the issuer of a security or the counterparty to a contract will default or otherwise become unable to honor a financial obligation.

Frontier Asset Core Bond ETF | U.S. Government Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

U.S. Government Securities Risk - Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Obligations issued by some U.S. Government agencies are backed by the U.S. Treasury, while others are backed solely by the ability of the agency to borrow from the U.S. Treasury or by the agency’s own resources.

Frontier Asset Core Bond ETF | Residential Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Residential Mortgage-Backed Securities Risk - Mortgage-backed securities are fixed income securities representing an interest in a pool of underlying mortgage loans. Mortgage-backed securities are sensitive to changes in interest rates, but may respond to these changes differently from other fixed income securities due to the possibility of prepayment of the underlying mortgage loans. As a result, it may not be

possible to determine in advance the actual maturity date or average life of a mortgage-backed security. Rising interest rates tend to discourage re-financings, with the result that the average life and volatility of the security will increase, exacerbating its decrease in market price. When interest rates fall, however, mortgage-backed securities may not gain as much in market value because of the expectation of additional mortgage prepayments, which must be reinvested at lower interest rates.

Frontier Asset Core Bond ETF | Commercial Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commercial Mortgage-Backed Securities Risk - Commercial mortgage-backed securities include securities that reflect an interest in, and are secured by, mortgage loans on commercial real property. Many of the risks of investing in commercial mortgage-backed securities reflect the risks of investing in the real estate securing the underlying mortgage loans. These risks reflect the effects of local and other economic conditions on real estate markets, the ability of tenants to make loan payments, and the ability of a property to attract and retain tenants. Commercial mortgage-backed securities may be less liquid and exhibit greater price volatility than other types of mortgage- or asset-backed securities.

Frontier Asset Core Bond ETF | Prepayment and Extension Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Prepayment and Extension Risk - When interest rates fall, issuers of high interest debt obligations may pay off the debts earlier than expected (prepayment risk), and the Fund may have to reinvest the proceeds at lower yields. When interest rates rise, issuers of lower interest debt obligations may pay off the debts later than expected (extension risk), thus keeping the Fund’s assets tied up in lower interest debt obligations.

Frontier Asset Core Bond ETF | Asset-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Asset-Backed Securities Risk - Asset-backed securities are securities backed by non-mortgage assets such as company receivables, truck and auto loans, leases and credit card receivables. Asset-backed securities may be issued as pass-through certificates, which represent undivided fractional ownership interests in the underlying pools of assets. Payment of principal and interest on asset-backed securities is dependent largely on the cash flows generated by the assets backing the securities, and asset-backed securities may not have the benefit of any security interest in the related assets.

Frontier Asset Core Bond ETF | Money Market Instruments Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Money Market Instruments Risk - The value of money market instruments may be affected by changing interest rates and by changes in the credit ratings of the investments. An investment in a money market fund is not a bank deposit and is not insured or guaranteed by any bank, the FDIC or any other government agency. Certain money market funds float their net asset value while others seek to preserve the value of investments at a stable net asset value (typically, $1.00 per share). An investment in a money market fund, even an investment in a fund seeking to maintain a stable net asset value per share, is not guaranteed and it is possible for the Fund to lose money by investing in

these and other types of money market funds. The regulations governing money market funds were recently amended in July, 2023, and their implementation and interpretation, as well as enforcement, may affect the manner of operation, performance and/or yield of money market funds.

Frontier Asset Core Bond ETF | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk - Certain securities may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

Frontier Asset Core Bond ETF | Valuation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Valuation Risk - The risk that a security may be difficult to value. The Fund may value certain securities at a price higher or lower than the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.

Frontier Asset Core Bond ETF | Investing in the United States Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investing in the United States Risk - The Fund focuses its investments in the United States. As a result, the Fund may be more susceptible to economic, political, regulatory or other events or conditions affecting issuers within the United States, and may be subject to greater price volatility and risk of loss, than a fund holding more geographically diverse investments.

Frontier Asset Core Bond ETF | Inflation Protected Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Inflation Protected Securities Risk - Inflation protected securities, including TIPS, are fixed income securities for which the principal and/or interest income paid is linked to inflation rates. The relationship between an inflation protected security and its associated inflation index affects both the sum the Fund is paid when the security matures and the amount of interest that the security pays the Fund. With inflation (a rise in the index), the principal of the security increases. With deflation (a drop in the index), the principal of the security decreases. Inflation protected securities pay interest at a fixed rate. Because the rate is applied to the adjusted principal, however, interest payments can vary in amount from one period to the next. If inflation occurs, the interest payment increases. In the event of deflation, the interest payment decreases. At the maturity of a security, the Fund receives the adjusted principal or the original principal, whichever is greater.

Frontier Asset Core Bond ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] As with all funds, a shareholder is subject to the risk that his or her investment could lose money.  
Frontier Asset Core Bond ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.  
Frontier Asset Opportunistic Credit ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk - The Fund is subject to the risk that the Adviser’s judgments about the attractiveness, value, or potential appreciation of the Fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the Fund fail to produce the intended results, the Fund could underperform in comparison to its benchmark index or other funds with similar objectives and investment strategies.

Frontier Asset Opportunistic Credit ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks - The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk - Shares of the Fund may trade on the Exchange above or below their NAV. The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Cash Transactions Risk - Like other ETFs, the Fund sells and redeems its shares only in large blocks called Creation Units and only to “Authorized Participants.” Unlike many other ETFs, however, the Fund expects to effect its creations and redemptions at least partially for cash, rather than in-kind securities. Thus, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. As a result, the Fund may pay out higher capital gains distributions than ETFs that redeem in-kind. Further, paying redemption proceeds at least partially in cash rather

than through in-kind delivery of portfolio securities may require the Fund to dispose of or sell portfolio investments to obtain the cash needed to distribute redemption proceeds at an inopportune time.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk - Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount to net asset value (“NAV”) and possibly face delisting: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

Frontier Asset Opportunistic Credit ETF | Convertible Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Convertible Securities Risk - The value of a convertible security is influenced by changes in interest rates (with investment value declining as interest rates increase and increasing as interest rates decline) and the credit standing of the issuer. The price of a convertible security will also normally vary in some proportion to changes in the price of the underlying common stock because of the conversion or exercise feature.

Frontier Asset Opportunistic Credit ETF | Investment in Other Investment Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investment in Other Investment Companies Risk - Because the Fund invests in other investment companies, such as ETFs, the Fund will be subject to substantially the same risks as those associated with the direct ownership of the securities held by such other investment companies. As a shareholder of another investment company, the Fund relies on that investment company to achieve its investment objective. If the investment company fails to achieve its objective, the value of the Fund’s investment could decline, which could adversely affect the Fund’s performance. By investing in another investment company, Fund shareholders indirectly bear the Fund’s proportionate share of the fees and expenses of the other investment company, in addition to the fees and expenses that Fund shareholders directly bear in connection with the Fund’s own operations. The Fund does not intend to invest in other investment companies unless the Adviser believes that the potential benefits of the investment justify the payment of any additional fees or expenses. Federal securities laws impose limitations on the Fund’s ability to invest in other investment companies.

Frontier Asset Opportunistic Credit ETF | Fixed-Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Fixed-Income Securities Risk - The prices of the Fund’s fixed-income securities respond to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments and their agencies. Generally, the Fund’s fixed-income securities will decrease in value if interest rates rise and vice versa. In a low interest rate environment, risks associated with rising rates are heightened. Declines in dealer market-making capacity as a result of structural or regulatory changes could decrease liquidity and/or increase volatility in the fixed-income markets.

Frontier Asset Opportunistic Credit ETF | Interest Rate Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Interest Rate Risk - The risk that a change in interest rates will cause a fall in the value of fixed-income securities, including U.S. Government securities, in which the Fund invests. Generally the value of the Fund’s fixed income securities will vary inversely with the direction of prevailing interest rates. Changing interest rates may have unpredictable effects on the markets and may affect the value and liquidity of instruments held by the Fund.

Frontier Asset Opportunistic Credit ETF | High Yield Bond Risk    
Prospectus [Line Items]    
Risk [Text Block]  

High Yield Bond Risk - High yield, or “junk,” bonds are debt securities rated below investment grade. High yield bonds are speculative, involve greater risks of default, downgrade, or price declines and are more volatile and tend to be less liquid than investment-grade securities. Companies issuing high yield bonds are less financially strong, are more

likely to encounter financial difficulties, and are more vulnerable to adverse market events and negative sentiments than companies with higher credit ratings.

Frontier Asset Opportunistic Credit ETF | Non-U.S. Government Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Non-U.S. Government Securities Risk - The risks that: (i) the governmental entity that controls the repayment of sovereign debt may not be willing or able to repay the principal and/or interest when it becomes due, due to factors such as debt service burden, political constraints, cash flow problems and other national economic factors; (ii) governments may default on their debt securities, which may require holders of such securities to participate in debt rescheduling or additional lending to defaulting governments; and (iii) there is no bankruptcy proceeding by which defaulted sovereign debt may be collected in whole or in part.

Frontier Asset Opportunistic Credit ETF | Corporate Fixed Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Corporate Fixed Income Securities Risk - Corporate fixed-income securities are fixed-income securities issued by public and private businesses. Corporate fixed-income securities respond to economic developments, especially changes in interest rates, as well as perceptions of the creditworthiness and business prospects of individual issuers. Corporate fixed income securities are subject to the risk that the issuer may not be able to pay interest or, ultimately, to repay principal upon maturity. Interruptions or delays of these payments could adversely affect the market value of the security.

Frontier Asset Opportunistic Credit ETF | Commercial Paper Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commercial Paper Risk - Commercial paper is a short-term obligation with a maturity generally ranging from one to 270 days and is issued by U.S. or foreign companies or other entities in order to finance their current operations. Such investments are unsecured and usually discounted from their value at maturity. The value of commercial paper may be affected by changes in the credit rating or financial condition of the issuing entities and will tend to fall when interest rates rise and rise when interest rates fall. Asset-backed commercial paper may be issued by structured investment vehicles or other conduits that are organized to issue the commercial paper and to purchase trade receivables or other financial assets. The repayment of asset-backed commercial paper depends primarily on the cash collections received from such an issuer’s underlying asset portfolio and the issuer’s ability to issue new asset-backed commercial paper.

Frontier Asset Opportunistic Credit ETF | Credit Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Credit Risk - The risk that the issuer of a security or the counterparty to a contract will default or otherwise become unable to honor a financial obligation.

Frontier Asset Opportunistic Credit ETF | U.S. Government Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

U.S. Government Securities Risk - Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Obligations issued by some U.S. Government agencies are backed by the U.S. Treasury, while others are backed solely by the ability of the agency to borrow from the U.S. Treasury or by the agency’s own resources.

Frontier Asset Opportunistic Credit ETF | Foreign Government Agencies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Government Agencies Risk - Bonds issued by government agencies, subdivisions or instrumentalities of foreign governments are generally backed only by the general creditworthiness and reputation of the entity issuing the bonds and may not be backed by the full faith and credit of the foreign government. Moreover, a foreign government that explicitly provides its full faith and credit to a particular entity may be, due to changed circumstances, unable or unwilling to provide that support. A foreign government agency’s operations and financial condition are influenced by the foreign government’s economic and other policies.

Frontier Asset Opportunistic Credit ETF | Municipal Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Municipal Securities Risk - Municipal securities, like other fixed income securities, rise and fall in value in response to economic and market factors, primarily changes in interest rates, and actual or perceived credit quality. Rising interest rates will generally cause municipal securities to decline in value. Longer-term securities respond more sharply to interest rate changes than do shorter-term securities. A municipal security will also lose value if, due to rating downgrades or other factors, there are concerns about the issuer’s current or future ability to make principal or interest payments.

Frontier Asset Opportunistic Credit ETF | Residential Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Residential Mortgage-Backed Securities Risk - Mortgage-backed securities are fixed income securities representing an interest in a pool of underlying mortgage loans. Mortgage-backed securities are sensitive to changes in interest rates, but may respond to these changes differently from other fixed income securities due to the possibility of prepayment of the underlying mortgage loans. As a result, it may not be possible to determine in advance the actual maturity date or average life

of a mortgage-backed security. Rising interest rates tend to discourage re-financings, with the result that the average life and volatility of the security will increase, exacerbating its decrease in market price. When interest rates fall, however, mortgage-backed securities may not gain as much in market value because of the expectation of additional mortgage prepayments, which must be reinvested at lower interest rates.

Frontier Asset Opportunistic Credit ETF | Commercial Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commercial Mortgage-Backed Securities Risk - Commercial mortgage-backed securities include securities that reflect an interest in, and are secured by, mortgage loans on commercial real property. Many of the risks of investing in commercial mortgage-backed securities reflect the risks of investing in the real estate securing the underlying mortgage loans. These risks reflect the effects of local and other economic conditions on real estate markets, the ability of tenants to make loan payments, and the ability of a property to attract and retain tenants. Commercial mortgage-backed securities may be less liquid and exhibit greater price volatility than other types of mortgage- or asset-backed securities.

Frontier Asset Opportunistic Credit ETF | Prepayment and Extension Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Prepayment and Extension Risk - When interest rates fall, issuers of high interest debt obligations may pay off the debts earlier than expected (prepayment risk), and the Fund may have to reinvest the proceeds at lower yields. When interest rates rise, issuers of lower interest debt obligations may pay off the debts later than expected (extension risk), thus keeping the Fund’s assets tied up in lower interest debt obligations.

Frontier Asset Opportunistic Credit ETF | Asset-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Asset-Backed Securities Risk - Asset-backed securities are securities backed by non-mortgage assets such as company receivables, truck and auto loans, leases and credit card receivables. Asset-backed securities may be issued as pass-through certificates, which represent undivided fractional ownership interests in the underlying pools of assets. Payment of principal and interest on asset-backed securities is dependent largely on the cash flows generated by the assets backing the securities, and asset-backed securities may not have the benefit of any security interest in the related assets.

Frontier Asset Opportunistic Credit ETF | Inflation Linked Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Inflation Linked Securities Risk - Inflation linked securities, including TIPS, are fixed income securities for which the principal and/or interest income paid is linked to inflation rates. The relationship between an inflation linked security and its associated inflation index affects both the sum the Fund is paid when the security matures and the amount of interest that the security pays the Fund. With inflation (a rise in the index), the principal of the security increases. With deflation (a drop in the index), the principal of the security decreases. Inflation protected securities pay interest at a fixed rate. Because the rate is applied to the adjusted principal, however, interest payments can vary in amount from one period to the next. If inflation occurs, the interest payment increases. In the event of deflation, the interest payment decreases. At the maturity of a security, the Fund receives the adjusted principal or the original principal, whichever is greater.

Frontier Asset Opportunistic Credit ETF | Bank Loans Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Bank Loans Risk - Investments in bank loans (through both assignments and participations) are generally subject to the same risks as investments in other types of debt instruments, including, in many cases, investments in high yield bonds. There may be limited public information available regarding bank loans and bank loans may be difficult to value. If the Fund holds a bank loan through another financial institution, or relies on a financial institution to administer the loan, its receipt of principal and interest on the loan may be subject to the credit risk of that financial institution. It is possible that collateral securing a loan, if any, may be insufficient or unavailable to the Fund, and that the Fund’s rights to collateral may be limited by bankruptcy or insolvency laws. Bank loans may not be considered “securities,” and purchasers, such as the Fund, therefore may not be entitled to rely on the anti-fraud protections of the federal securities laws.

Frontier Asset Opportunistic Credit ETF | Collateralized Loan Obligations CLOs Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Collateralized Loan Obligations (“CLOs”) Risk - Collateralized loan obligations are generally subject to credit, interest rate, prepayment and extension, valuation and liquidity risks, which are described elsewhere in this section. These securities also are subject to risk of default on the underlying asset, particularly during periods of economic downturn. CLOs carry additional risks including, but not limited to, (i) the possibility that distributions from collateral securities will not be adequate to make interest of other payments, (ii) the collateral may decline in value or default, (iii) the Fund may invest in obligations that are subordinate to other classes, and (iv) the complex structure of the security may not be fully understood at the time of investment and produce disputes with the issuer or unexpected investment results.

Frontier Asset Opportunistic Credit ETF | Money Market Instruments Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Money Market Instruments Risk - The value of money market instruments may be affected by changing interest rates and by changes in the credit ratings of the investments. An investment in a money market fund is not a bank deposit and is not insured or guaranteed by any bank, the FDIC or any other government agency. Certain money market funds float their net asset value while others seek to preserve the value of investments at a stable net asset value (typically, $1.00 per share). An investment in a money market fund, even an investment in a fund seeking to maintain a stable net asset value per share, is not guaranteed and it is possible for the Fund to lose money by investing in these and other types of money market funds. The regulations governing

money market funds were recently amended in July, 2023, and their implementation and interpretation, as well as enforcement, may affect the manner of operation, performance and/or yield of money market funds.

Frontier Asset Opportunistic Credit ETF | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk - Certain securities may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

Frontier Asset Opportunistic Credit ETF | Valuation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Valuation Risk - The risk that a security may be difficult to value. The Fund may value certain securities at a price higher or lower than the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.

Frontier Asset Opportunistic Credit ETF | Investing in the United States Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investing in the United States Risk - The Fund focuses its investments in the United States. As a result, the Fund may be more susceptible to economic, political, regulatory or other events or conditions affecting

issuers within the United States, and may be subject to greater price volatility and risk of loss, than a fund holding more geographically diverse investments.

Frontier Asset Opportunistic Credit ETF | Mortgage-Backed Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Mortgage-Backed Securities Risk - Mortgage-backed securities are affected by, among other things, interest rate changes and the possibility of prepayment of the underlying mortgage loans. Mortgage-backed securities are also subject to the risk that underlying borrowers will be unable to meet their obligations. “To-be-announced” transactions (“TBA Transactions”) involve the additional risk that the value of the mortgage-backed securities to be purchased declines prior to settlement date or the counterparty does not deliver the securities as promised.

Frontier Asset Opportunistic Credit ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] As with all funds, a shareholder is subject to the risk that his or her investment could lose money.  
Frontier Asset Opportunistic Credit ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.  
Frontier Asset Global Small Cap Equity ETF | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk - Since it purchases equity securities, the Fund is subject to the risk that stock prices may fall over short or extended periods of time. Historically, the equity market has moved in cycles, and the value of the Fund’s securities may fluctuate from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. A variety of factors can lead to volatility in local, regional, or global markets, including regulatory events, inflation, interest rates, government defaults, government shutdowns, war, regional conflicts, acts of terrorism, social unrest, the imposition of tariffs, trade disputes, and substantial economic downturn or recessions. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

Frontier Asset Global Small Cap Equity ETF | Growth Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Growth Investment Style Risk - An investment in growth stocks may be susceptible to rapid price swings, especially during periods of

economic uncertainty. Growth stocks typically have little or no dividend income to cushion the effect of adverse market conditions. In addition, growth stocks may be particularly volatile in the event of earnings disappointments or other financial difficulties experienced by the issuer.

Frontier Asset Global Small Cap Equity ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk - The Fund is subject to the risk that the Adviser’s judgments about the attractiveness, value, or potential appreciation of the Fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the Fund fail to produce the intended results, the Fund could underperform in comparison to its benchmark index or other funds with similar objectives and investment strategies.

Frontier Asset Global Small Cap Equity ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks - The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk - Shares of the Fund may trade on the Exchange above or below their NAV. The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Cash Transactions Risk - Like other ETFs, the Fund sells and redeems its shares only in large blocks called Creation Units and only to “Authorized Participants.” Unlike many other ETFs, however,

the Fund expects to effect its creations and redemptions at least partially for cash, rather than in-kind securities. Thus, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. As a result, the Fund may pay out higher capital gains distributions than ETFs that redeem in-kind. Further, paying redemption proceeds at least partially in cash rather than through in-kind delivery of portfolio securities may require the Fund to dispose of or sell portfolio investments to obtain the cash needed to distribute redemption proceeds at an inopportune time.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk - Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount to net asset value (“NAV”) and possibly face delisting: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

Frontier Asset Global Small Cap Equity ETF | Preferred Stock Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Preferred Stock Risk - Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.

Frontier Asset Global Small Cap Equity ETF | Investment in Other Investment Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investment in Other Investment Companies Risk - Because the Fund invests in other investment companies, such as ETFs, the Fund will be subject to substantially the same risks as those associated with the direct ownership of the securities held by such other investment companies. As a shareholder of another investment company, the Fund relies on that investment company to achieve its investment objective. If the investment company fails to achieve its objective, the value of the Fund’s investment could decline, which could adversely affect the Fund’s performance. By investing in another investment company, Fund shareholders indirectly bear the Fund’s proportionate share of the fees and expenses of the other investment company, in addition to the fees and expenses that Fund shareholders directly bear in connection with the Fund’s own operations. The Fund does not intend to invest in other investment companies unless the Adviser believes that the potential benefits of the investment justify the payment of any additional fees or expenses. Federal securities laws impose limitations on the Fund’s ability to invest in other investment companies.

Frontier Asset Global Small Cap Equity ETF | Foreign Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Company Risk - Investing in foreign companies poses additional risks since political and economic events unique to a country or region will affect those markets and their issuers. Securities of foreign companies may not be registered with the U.S. Securities and Exchange Commission (the “SEC”) and foreign companies are generally not subject to the same level of regulatory controls imposed on U.S. issuers. Income from foreign securities owned by the Fund may be reduced by a withholding tax at the source, which tax would reduce income received from the securities comprising the Fund’s portfolio. Foreign securities may also be more difficult to value than securities of U.S. issuers and foreign markets and securities may be less liquid. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund.

Frontier Asset Global Small Cap Equity ETF | Emerging Markets Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Emerging Markets Securities Risk - Investments in emerging markets securities are considered speculative and subject to heightened risks in addition to the general risks of investing in foreign securities. Unlike

more established markets, emerging markets may have governments that are less stable, markets that are less liquid and economies that are less developed. In addition, the securities markets of emerging market countries may consist of companies with smaller market capitalizations and may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; and possible restrictions on repatriation of investment income and capital. Furthermore, foreign investors may be required to register the proceeds of sales, and future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization or creation of government monopolies.

Frontier Asset Global Small Cap Equity ETF | Foreign Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Currency Risk - As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, in which case, the dollar value of an investment in the Fund would be adversely affected.

Frontier Asset Global Small Cap Equity ETF | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk - Certain securities may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

Frontier Asset Global Small Cap Equity ETF | Valuation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Valuation Risk - The risk that a security may be difficult to value. The Fund may value certain securities at a price higher or lower than the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.

Frontier Asset Global Small Cap Equity ETF | Small-Capitalization Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Small-Capitalization Companies Risk - The risk that, compared to mid- and large- capitalization companies, small-capitalization companies in which the Fund may invest may be less stable and more susceptible to adverse developments, and their securities may be more volatile and less liquid.

Frontier Asset Global Small Cap Equity ETF | Mid-Capitalization Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Mid-Capitalization Companies Risk - The risk that mid-capitalization companies in which the Fund may invest may have greater price volatility, lower trading volume and be more vulnerable to adverse business or economic events than larger, more established companies. In addition, mid-capitalization companies may have narrow product lines, smaller shares of their product or service markets and fewer financial resources than large capitalization companies.

Frontier Asset Global Small Cap Equity ETF | Value Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Value Investment Style Risk - An investment in value stocks presents the risk that the stocks may never reach what the Adviser or a sub-adviser believes are their full market values, either because the market fails to recognize what the Adviser or a sub-adviser considers to be the companies’ true business values or because the Adviser or sub-adviser misjudged those values. In addition, value stocks may fall out of favor with investors and underperform growth stocks during given periods.

Frontier Asset Global Small Cap Equity ETF | Depositary Receipts Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Depositary Receipts Risk - Depositary receipts, such as ADRs, GDRs and EDRs, are certificates evidencing ownership of shares of a foreign issuer that are issued by depositary banks and generally trade on an established market. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities, including, among other things, political, social and economic developments abroad, currency movements and different legal, regulatory and tax environments.

Frontier Asset Global Small Cap Equity ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] As with all funds, a shareholder is subject to the risk that his or her investment could lose money.  
Frontier Asset Global Small Cap Equity ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.  
Frontier Asset Total International Equity ETF | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk - Since it purchases equity securities, the Fund is subject to the risk that stock prices may fall over short or extended periods of time. Historically, the equity market has moved in cycles, and the value of the Fund’s securities may fluctuate from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. A variety of factors can lead to volatility in local, regional, or global markets, including regulatory events, inflation, interest rates, government defaults, government shutdowns, war, regional conflicts, acts of terrorism, social unrest, the imposition of tariffs, trade disputes, and substantial economic downturn or recessions. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

Frontier Asset Total International Equity ETF | Growth Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Growth Investment Style Risk - An investment in growth stocks may be susceptible to rapid price swings, especially during periods of economic uncertainty. Growth stocks typically have little or no dividend income to cushion the effect of adverse market conditions. In addition,

growth stocks may be particularly volatile in the event of earnings disappointments or other financial difficulties experienced by the issuer.

Frontier Asset Total International Equity ETF | Mid-Capitalization Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Mid-Capitalization Company Risk - The risk that mid-capitalization companies in which the Fund may invest may have greater price volatility, lower trading volume and be more vulnerable to adverse business or economic events than larger, more established companies. In addition, mid-capitalization companies may have narrow product lines, smaller shares of their product or service markets and fewer financial resources than large capitalization companies.

Frontier Asset Total International Equity ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk - The Fund is subject to the risk that the Adviser’s judgments about the attractiveness, value, or potential

appreciation of the Fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the Fund fail to produce the intended results, the Fund could underperform in comparison to its benchmark index or other funds with similar objectives and investment strategies.

Frontier Asset Total International Equity ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks - The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk - Shares of the Fund may trade on the Exchange above or below their NAV. The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Cash Transactions Risk - Like other ETFs, the Fund sells and redeems its shares only in large blocks called Creation Units and only to “Authorized Participants.” Unlike many other ETFs, however, the Fund expects to effect its creations and redemptions at least partially for cash, rather than in-kind securities. Thus, an investment

in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. As a result, the Fund may pay out higher capital gains distributions than ETFs that redeem in-kind. Further, paying redemption proceeds at least partially in cash rather than through in-kind delivery of portfolio securities may require the Fund to dispose of or sell portfolio investments to obtain the cash needed to distribute redemption proceeds at an inopportune time.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk - Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount to net asset value (“NAV”) and possibly face delisting: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

Frontier Asset Total International Equity ETF | Preferred Stock Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Preferred Stock Risk - Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.

Frontier Asset Total International Equity ETF | Investment in Other Investment Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investment in Other Investment Companies Risk - Because the Fund invests in other investment companies, such as ETFs, the Fund will be subject to substantially the same risks as those associated with the direct ownership of the securities held by such other investment companies. As a shareholder of another investment company, the Fund relies on that investment company to achieve its investment objective. If the investment company fails to achieve its objective, the value of the Fund’s investment could decline, which could adversely affect the Fund’s performance. By investing in another investment company, Fund shareholders indirectly bear the Fund’s proportionate share of the fees and expenses of the other investment company, in addition to the fees and expenses that Fund shareholders directly bear in connection with the Fund’s own operations. The Fund does not intend to invest in other investment companies unless the Adviser believes that the potential benefits of the investment justify the payment of any additional fees or expenses. Federal securities laws impose limitations on the Fund’s ability to invest in other investment companies.

Frontier Asset Total International Equity ETF | Foreign Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Company Risk - Investing in foreign companies poses additional risks since political and economic events unique to a country or region will affect those markets and their issuers. Securities of foreign companies may not be registered with the U.S. Securities and Exchange Commission (the “SEC”) and foreign companies are generally not subject to the same level of regulatory controls imposed on U.S. issuers. Income from foreign securities owned by the Fund may be reduced by a withholding tax at the source, which tax would reduce income received from the securities comprising the Fund’s portfolio. Foreign securities may also be more difficult to value than securities of U.S. issuers and foreign markets and securities may be less liquid. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund.

Frontier Asset Total International Equity ETF | Emerging Markets Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Emerging Markets Securities Risk - Investments in emerging markets securities are considered speculative and subject to heightened risks in addition to the general risks of investing in foreign securities. Unlike more established markets, emerging markets may have governments that are less stable, markets that are less liquid and economies that are

less developed. In addition, the securities markets of emerging market countries may consist of companies with smaller market capitalizations and may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; and possible restrictions on repatriation of investment income and capital. Furthermore, foreign investors may be required to register the proceeds of sales, and future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization or creation of government monopolies.

Frontier Asset Total International Equity ETF | Foreign Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Currency Risk - As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, in which case, the dollar value of an investment in the Fund would be adversely affected.

Frontier Asset Total International Equity ETF | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk - Certain securities may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

Frontier Asset Total International Equity ETF | Valuation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Valuation Risk - The risk that a security may be difficult to value. The Fund may value certain securities at a price higher or lower than the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.

Frontier Asset Total International Equity ETF | Value Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Value Investment Style Risk - An investment in value stocks presents the risk that the stocks may never reach what the Adviser or a sub-adviser believes are their full market values, either because the market fails to recognize what the Adviser or a sub-adviser considers to be the companies’ true business values or because the Adviser or sub-adviser misjudged those values. In addition, value stocks may fall out of favor with investors and underperform growth stocks during given periods.

Frontier Asset Total International Equity ETF | Depositary Receipts Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Depositary Receipts Risk - Depositary receipts, such as ADRs, GDRs and EDRs, are certificates evidencing ownership of shares of a foreign issuer that are issued by depositary banks and generally trade on an established market. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities, including, among other things, political, social and economic developments abroad, currency movements and different legal, regulatory and tax environments.

Frontier Asset Total International Equity ETF | Large Capitalization Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Large Capitalization Risk - If valuations of large capitalization companies appear to be greatly out of proportion to the valuations of small or medium capitalization companies, investors may migrate to the stocks of small and medium-sized companies. The risk that larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and consumer tastes. Larger companies also may not be able to attain the high growth rates of successful smaller companies.

Frontier Asset Total International Equity ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] As with all funds, a shareholder is subject to the risk that his or her investment could lose money.  
Frontier Asset Total International Equity ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.  
Frontier Asset U.S. Large Cap Equity ETF | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk - Since it purchases equity securities, the Fund is subject to the risk that stock prices may fall over short or extended periods of time. Historically, the equity market has moved in cycles, and the value of the Fund’s securities may fluctuate from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. A variety of factors can lead to volatility in local, regional, or global markets, including regulatory events, inflation, interest rates, government defaults, government shutdowns, war, regional conflicts, acts of terrorism, social unrest, the imposition of tariffs, trade disputes, and substantial economic downturn or recessions. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

Frontier Asset U.S. Large Cap Equity ETF | Growth Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Growth Investment Style Risk - An investment in growth stocks may be susceptible to rapid price swings, especially during periods of economic uncertainty. Growth stocks typically have little or no dividend income to cushion the effect of adverse market conditions. In addition, growth stocks may be particularly volatile in the event of earnings disappointments or other financial difficulties experienced by the issuer.

Frontier Asset U.S. Large Cap Equity ETF | Mid-Capitalization Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Mid-Capitalization Company Risk - The risk that mid-capitalization companies in which the Fund may invest may have greater price volatility, lower trading volume and be more vulnerable to adverse business or economic events than larger, more established companies. In addition, mid-capitalization companies may have narrow product lines, smaller

shares of their product or service markets and fewer financial resources than large capitalization companies.

Frontier Asset U.S. Large Cap Equity ETF | Active Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Active Management Risk - The Fund is subject to the risk that the Adviser’s judgments about the attractiveness, value, or potential appreciation of the Fund’s investments may prove to be incorrect. If the investments selected and strategies employed by the Fund fail to produce the intended results, the Fund could underperform in comparison to its benchmark index or other funds with similar objectives and investment strategies.

Frontier Asset U.S. Large Cap Equity ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks - The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk - Shares of the Fund may trade on the Exchange above or below their NAV. The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Cash Transactions Risk - Like other ETFs, the Fund sells and redeems its shares only in large blocks called Creation Units and only to “Authorized Participants.” Unlike many other ETFs, however, the Fund expects to effect its creations and redemptions at least partially for cash, rather than in-kind securities. Thus, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. As a result, the Fund may pay out higher capital gains distributions than ETFs that redeem in-kind. Further, paying redemption proceeds at least partially in cash rather than through in-kind delivery of portfolio securities may require the Fund to dispose of or sell portfolio investments to obtain the cash needed to distribute redemption proceeds at an inopportune time.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk - Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount to net asset value (“NAV”) and possibly face delisting: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

 

Frontier Asset U.S. Large Cap Equity ETF | REITs Risk    
Prospectus [Line Items]    
Risk [Text Block]  

REITs Risk - REITs are pooled investment vehicles that own, and usually operate, income-producing real estate. REITs are susceptible to the risks associated with direct ownership of real estate, such as the following: declines in property values; increases in property taxes, operating expenses, interest rates or competition; overbuilding; zoning changes; and losses from casualty or condemnation. REITs typically incur fees that are separate from those of the Fund. Accordingly, the Fund’s investments in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs’ operating expenses, in addition to paying Fund expenses. REIT operating expenses are not reflected in the fee table and example in this prospectus.

Frontier Asset U.S. Large Cap Equity ETF | Investment in Other Investment Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investment in Other Investment Companies Risk - Because the Fund invests in other investment companies, such as ETFs, the Fund will be subject to substantially the same risks as those associated with the direct ownership of the securities held by such other investment companies. As a shareholder of another investment company, the Fund relies on that investment company to achieve its investment objective. If the investment company fails to achieve its objective, the value of the Fund’s investment could decline, which could adversely affect the Fund’s performance. By investing in another investment company, Fund shareholders indirectly bear the Fund’s proportionate share of the fees and expenses of the other investment company, in addition to the fees and expenses that Fund shareholders directly bear in connection with the Fund’s own operations. The Fund does not intend to invest in other investment companies unless the Adviser believes that the potential

benefits of the investment justify the payment of any additional fees or expenses. Federal securities laws impose limitations on the Fund’s ability to invest in other investment companies.

Frontier Asset U.S. Large Cap Equity ETF | Foreign Company Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Company Risk - Investing in foreign companies poses additional risks since political and economic events unique to a country or region will affect those markets and their issuers. Securities of foreign companies may not be registered with the U.S. Securities and Exchange Commission (the “SEC”) and foreign companies are generally not subject to the same level of regulatory controls imposed on U.S. issuers. Income from foreign securities owned by the Fund may be reduced by a withholding tax at the source, which tax would reduce income received from the securities comprising the Fund’s portfolio. Foreign securities may also be more difficult to value than securities of U.S. issuers and foreign markets and securities may be less liquid. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund.

Frontier Asset U.S. Large Cap Equity ETF | Valuation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Valuation Risk - The risk that a security may be difficult to value. The Fund may value certain securities at a price higher or lower than the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.

Frontier Asset U.S. Large Cap Equity ETF | Investing in the United States Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investing in the United States Risk - The Fund focuses its investments in the United States. As a result, the Fund may be more susceptible to economic, political, regulatory or other events or conditions affecting issuers within the United States, and may be subject to greater price volatility and risk of loss, than a fund holding more geographically diverse investments.

Frontier Asset U.S. Large Cap Equity ETF | Value Investment Style Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Value Investment Style Risk - An investment in value stocks presents the risk that the stocks may never reach what the Adviser or a sub-adviser believes are their full market values, either because the market fails to recognize what the Adviser or a sub-adviser considers to be the companies’ true business values or because the Adviser or sub-adviser misjudged those values. In addition, value stocks may fall out of favor with investors and underperform growth stocks during given periods.

Frontier Asset U.S. Large Cap Equity ETF | Large Capitalization Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Large Capitalization Risk - If valuations of large capitalization companies appear to be greatly out of proportion to the valuations of small or medium capitalization companies, investors may migrate to the stocks of small and medium-sized companies. The risk that larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and consumer tastes. Larger companies also may not be able to attain the high growth rates of successful smaller companies.

Frontier Asset U.S. Large Cap Equity ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] As with all funds, a shareholder is subject to the risk that his or her investment could lose money.  
Frontier Asset U.S. Large Cap Equity ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and is not insured or guaranteed by the FDIC or any other government agency.  
KOPERNIK GLOBAL ALL-CAP FUND | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk — Since it purchases equity securities, the Fund is subject to the risk that stock prices will fall over short or extended periods of time. Historically, the equity markets have moved in cycles, and the value of the Fund’s equity securities may fluctuate drastically from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. Actual or threatened war or armed conflicts, acts of terrorism, social or political unrest, the imposition of tariffs and other restrictions on trade, sanctions, government defaults, government shutdowns, and other factors could affect the securities market. In addition, the impact of any epidemic, pandemic or natural disaster, or widespread fear that such events may occur, could negatively affect the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the markets in general in significant and unforeseen ways. Any such impact could adversely affect the prices and liquidity of the securities and other instruments in which the Fund invests, which in turn could negatively

impact the Fund’s performance and cause losses on your investment in the Fund. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

KOPERNIK GLOBAL ALL-CAP FUND | Sector Focus Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Sector Focus Risk — Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.

KOPERNIK GLOBAL ALL-CAP FUND | Foreign Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Currency Risk — As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to foreign currency risk. Foreign currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, in which case, the dollar value of an investment in the Fund would be adversely affected.

KOPERNIK GLOBAL ALL-CAP FUND | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk — Certain securities, including privately placed securities and securities of emerging or frontier market issuers, may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

KOPERNIK GLOBAL ALL-CAP FUND | Depositary Receipts Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Depositary Receipts Risk — Depositary receipts are certificates evidencing ownership of shares of a foreign issuer that are issued by depositary banks and generally trade on an established market. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities, including, among other things, political, social and economic developments abroad, currency movements, and different legal, regulatory and tax environments.

KOPERNIK GLOBAL ALL-CAP FUND | ForeignEmerging and Frontier Market Security Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign/Emerging and Frontier Market Security Risk — Non-U.S. securities may be subject to additional risks due to, among other things, political, social and economic developments abroad, currency movements and different legal, regulatory and tax environments. Non-U.S. securities are also subject to risks associated with the potential imposition of economic and other sanctions against a particular foreign country, its nationals or industries or businesses within the country. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund. These additional risks may be heightened with respect to emerging and frontier market countries since political turmoil and rapid changes in economic conditions are more likely to occur in these countries.

KOPERNIK GLOBAL ALL-CAP FUND | Small and Medium Capitalization Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Small and Medium Capitalization Companies Risk — The risk that small and medium capitalization companies in which the Fund invests may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, small and medium capitalization companies may have limited product lines, markets and financial resources, and may depend upon a relatively small management group. Therefore, small capitalization and medium capitalization stocks may be more volatile than those of larger companies. Small capitalization and medium capitalization stocks may be traded over-the-counter or listed on an exchange. The market for small and medium capitalization companies may be less liquid than the market for larger capitalization companies.

KOPERNIK GLOBAL ALL-CAP FUND | Geographic Focus Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Geographic Focus Risk — To the extent that a large portion of its portfolio is invested in a particular country or region, the Fund may be more susceptible to economic, political, regulatory or other events or conditions affecting issuers within that country or region. As a result, the Fund may be subject to greater price volatility and risk of loss than a fund holding more geographically diverse investments.

KOPERNIK GLOBAL ALL-CAP FUND | Sanctions Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Sanctions Risk — Russia’s military invasion of Ukraine, which started in February 2022, significantly amplified already existing geopolitical tensions. Russia’s actions and the resulting responses by the United States and other countries have increased and may continue to increase volatility and uncertainty in the financial markets and adversely affect regional and global economies. The United States and other countries have imposed broad-ranging economic sanctions on Russia, certain Russian individuals, banking entities and corporations, and Belarus as a response to Russia’s invasion of Ukraine and may impose sanctions on other countries. The extent and duration of the war in Ukraine and the longevity and severity of sanctions remain unknown, but they could result in further and significant market disruptions and may adversely impact the European economy as well as the price and availability of certain commodities, including oil and natural gas, throughout the world. These sanctions, and the resulting disruption of the Russian economy, have caused and may continue to cause volatility in other regional and global markets and may negatively impact the performance of various sectors and industries, as well as companies in other countries, which could have a negative effect on the performance of the Fund. The sanctions and/or any retaliatory action by Russia could also require the Fund to freeze any existing investments in Russian companies or prohibit the Fund from selling or transacting in these investments and could potentially impact the Fund’s liquidity. In general terms, the overall negative impact to the Fund will depend on the extent to which the Fund is prohibited from selling or otherwise transacting in its investments at any given time and whether a fair market valuation can be readily obtained, particularly for any Russia

currency-denominated investments and investments in U.S. dollar-denominated depositary receipts representing securities of Russian issuers.

KOPERNIK GLOBAL ALL-CAP FUND | Convertible and Preferred Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Convertible and Preferred Securities Risk — Convertible and preferred securities have many of the same characteristics as stocks, including many of the same risks. In addition, convertible securities may be more sensitive to changes in interest rates than stocks. Convertible securities may also have credit ratings below investment grade, meaning that they carry a higher risk of failure by the issuer to pay principal and/or interest when due.

KOPERNIK GLOBAL ALL-CAP FUND | Private Placements Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Private Placements Risk — Investment in privately placed securities may be less liquid than in publicly traded securities. Although these securities may be resold in privately negotiated transactions, the prices realized from these sales could be less than those originally paid by the Fund or less than what may be considered the fair value of such securities. Further, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that might be applicable if their securities were publicly traded.

KOPERNIK GLOBAL ALL-CAP FUND | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] You could lose money by investing in the Fund.  
KOPERNIK GLOBAL ALL-CAP FUND | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and it is not insured or guaranteed by the FDIC or any government agency.  
KOPERNIK INTERNATIONAL FUND | Equity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Risk — Since it purchases equity securities, the Fund is subject to the risk that stock prices will fall over short or extended periods of time. Historically, the equity markets have moved in cycles, and the value of the Fund’s equity securities may fluctuate drastically from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by such companies may suffer a decline in response. Actual or threatened war or armed conflicts, acts of terrorism, social or political unrest, the imposition of tariffs and other restrictions on trade, sanctions, government defaults, government shutdowns, and other factors could affect the securities market. In addition, the impact of any epidemic, pandemic or natural disaster, or widespread fear that such events may occur, could negatively affect the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the markets in general in significant and unforeseen ways. Any such impact could adversely affect the prices and liquidity of the securities and other instruments in which the Fund invests, which in turn could negatively impact the Fund’s performance and cause losses on your investment in the Fund. These factors contribute to price volatility, which is the principal risk of investing in the Fund.

KOPERNIK INTERNATIONAL FUND | Sector Focus Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Sector Focus Risk — Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.

KOPERNIK INTERNATIONAL FUND | Foreign Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Currency Risk — As a result of the Fund’s investments in securities denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to foreign currency risk. Foreign currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, in which case, the dollar value of an investment in the Fund would be adversely affected.

KOPERNIK INTERNATIONAL FUND | Liquidity Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Liquidity Risk — Certain securities, including privately placed securities and securities of emerging or frontier market issuers, may be difficult or impossible to sell at the time and the price that the Fund would like. The Fund may have to accept a lower price to sell a security, sell other securities to raise cash, or give up an investment opportunity, any of which could have a negative effect on Fund management or performance.

KOPERNIK INTERNATIONAL FUND | Depositary Receipts Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Depositary Receipts Risk — Depositary receipts are certificates evidencing ownership of shares of a foreign issuer that are issued by depositary banks and generally trade on an established market. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities, including, among other things, political, social and economic developments abroad, currency movements, and different legal, regulatory and tax environments.

KOPERNIK INTERNATIONAL FUND | ForeignEmerging and Frontier Market Security Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign/Emerging and Frontier Market Security Risk — Non-U.S. securities may be subject to additional risks due to, among other things, political, social and economic developments abroad, currency movements and different legal, regulatory and tax environments. Non-U.S. securities are also subject to risks associated with the potential imposition of economic and other sanctions against a particular foreign country, its nationals or industries or businesses within the country. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund. These additional risks may be heightened with respect to emerging and frontier market countries since political turmoil and rapid changes in economic conditions are more likely to occur in these countries.

KOPERNIK INTERNATIONAL FUND | Small and Medium Capitalization Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Small and Medium Capitalization Companies Risk — The risk that small and medium capitalization companies in which the Fund invests may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, small and medium capitalization companies may have limited product lines, markets and financial resources, and may depend upon a relatively small management group. Therefore, small capitalization and medium capitalization stocks may be more volatile than those of larger companies. Small capitalization and medium capitalization stocks may be traded over-the-counter or listed on an exchange. The market for small and medium capitalization companies may be less liquid than the market for larger capitalization companies.

KOPERNIK INTERNATIONAL FUND | Geographic Focus Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Geographic Focus Risk — To the extent that a large portion of its portfolio is invested in a particular country or region, the Fund may be more susceptible to economic, political, regulatory or other events or

conditions affecting issuers within that country or region. As a result, the Fund may be subject to greater price volatility and risk of loss than a fund holding more geographically diverse investments.

KOPERNIK INTERNATIONAL FUND | Sanctions Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Sanctions Risk — Russia’s military invasion of Ukraine, which started in February 2022, significantly amplified already existing geopolitical tensions. Russia’s actions and the resulting responses by the United States and other countries have increased and may continue to increase volatility and uncertainty in the financial markets and adversely affect regional and global economies. The United States and other countries have imposed broad-ranging economic sanctions on Russia, certain Russian individuals, banking entities and corporations, and Belarus as a response to Russia’s invasion of Ukraine and may impose sanctions on other countries. The extent and duration of the war in Ukraine and the longevity and severity of sanctions remain unknown, but they could result in further and significant market disruptions and may adversely impact the European economy as well as the price and availability of certain commodities, including oil and natural gas,

throughout the world. These sanctions, and the resulting disruption of the Russian economy, have caused and may continue to cause volatility in other regional and global markets and may negatively impact the performance of various sectors and industries, as well as companies in other countries, which could have a negative effect on the performance of the Fund. The sanctions and/or any retaliatory action by Russia could also require the Fund to freeze any existing investments in Russian companies or prohibit the Fund from selling or transacting in these investments and could potentially impact the Fund’s liquidity. In general terms, the overall negative impact to the Fund will depend on the extent to which the Fund is prohibited from selling or otherwise transacting in its investments at any given time and whether a fair market valuation can be readily obtained, particularly for any Russia currency-denominated investments and investments in U.S. dollar-denominated depositary receipts representing securities of Russian issuers.

KOPERNIK INTERNATIONAL FUND | Convertible and Preferred Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Convertible and Preferred Securities Risk — Convertible and preferred securities have many of the same characteristics as stocks, including many of the same risks. In addition, convertible securities may be more sensitive to changes in interest rates than stocks. Convertible securities may also have credit ratings below investment grade, meaning that they carry a higher risk of failure by the issuer to pay principal and/or interest when due.

KOPERNIK INTERNATIONAL FUND | Private Placements Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Private Placements Risk — Investment in privately placed securities may be less liquid than in publicly traded securities. Although these securities may be resold in privately negotiated transactions, the prices realized from these sales could be less than those originally paid by

the Fund or less than what may be considered the fair value of such securities. Further, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that might be applicable if their securities were publicly traded.

KOPERNIK INTERNATIONAL FUND | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] You could lose money by investing in the Fund.  
KOPERNIK INTERNATIONAL FUND | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and it is not insured or guaranteed by the FDIC or any government agency.  
PMV Adaptive Risk Parity ETF | Portfolio Turnover Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Portfolio Turnover Risk — Due to its investment strategy, the Fund may buy and sell securities frequently. This may result in higher transaction costs and additional capital gains tax liabilities, which may affect the Fund’s performance.

PMV Adaptive Risk Parity ETF | ETF Risks    
Prospectus [Line Items]    
Risk [Text Block]  

ETF Risks — The Fund is an ETF and, as a result of this structure, it is exposed to the following risks:

 

Trading Risk — Shares of the Fund may trade on NYSE Arca, Inc. (the “Exchange”) above or below their net asset value (“NAV”). The NAV of shares of the Fund will fluctuate with changes in the market value of the Fund’s holdings. In stressed

market conditions, the market for Fund shares may become less liquid in response to deteriorating liquidity in the markets for the Fund’s underling holdings, which may cause a variance in the market price of the Fund shares and their underlying value. In addition, although the Fund’s shares are currently listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained. Trading in Fund shares may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in shares of the Fund inadvisable.

 

Limited Authorized Participants, Market Makers and Liquidity Providers Risk — Because the Fund is an ETF, only a limited number of institutional investors (known as “Authorized Participants”) are authorized to purchase and redeem shares directly from the Fund. 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, Fund shares may trade at a material discount to NAV and possibly face delisting if: (i) Authorized Participants exit the business or otherwise become unable to process creation and/or redemption orders and no other Authorized Participants 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.

PMV Adaptive Risk Parity ETF | Fixed-Income Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Fixed Income Securities Risk — The prices of fixed income securities respond to economic developments, particularly interest rate changes, as well as to perceptions about the creditworthiness of individual issuers, including governments. Generally, fixed income securities will decrease in value if interest rates rise and vice versa. The volatility of lower-rated securities is even greater than that of higher-rated securities. Interest rate risk is generally greater for fixed income securities with longer maturities or duration.

PMV Adaptive Risk Parity ETF | Commodities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Commodities Risk — Commodities include, among other things, energy products, agricultural products, industrial metals and precious metals. To the extent that the Fund gains exposure to the commodities markets, such exposure may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked investments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or sectors affecting a particular industry or commodity, such as drought, floods, weather, embargoes, tariffs and international economic, political and regulatory developments. The prices of certain commodities may fluctuate widely due to factors such as changes in value, supply and demand and governmental regulatory policies.

PMV Adaptive Risk Parity ETF | Currency Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Currency Risk — As a result of an ETP’s investments in securities or other investments denominated in, and/or receiving revenues in, foreign currencies, the ETP will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, resulting in the dollar value of an investment in the Fund being adversely affected. Currency exchange rates may fluctuate in response to, among other things, changes in interest rates, intervention (or failure to intervene) by U.S. or foreign governments, central banks or supranational entities, or by the imposition of currency controls or other political developments in the United States or abroad. Additionally, there is a risk that the U.S. dollar may depreciate relative to a basket of foreign currencies when the Fund has long directional exposure to the U.S. dollar.

PMV Adaptive Risk Parity ETF | Interest Rate Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Interest Rate Risk — The risk that a change in interest rates will cause a fall in the value of fixed income securities, including U.S. Government securities, in which the Fund invests. Generally, the value of the Fund’s fixed income securities will vary inversely with the direction of prevailing interest rates. Changing interest rates may have unpredictable effects on the markets and may affect the value and liquidity of instruments held by the Fund. Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Interest rate risk may be heightened for investments in emerging market countries.

PMV Adaptive Risk Parity ETF | Credit Risk [Member]    
Prospectus [Line Items]    
Risk [Text Block]  

Credit Risk — The risk that the issuer of a security or the counterparty to a contract will default or otherwise become unable to honor a financial obligation.

PMV Adaptive Risk Parity ETF | U.S. Government Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

U.S. Government Securities Risk — Although U.S. Government securities are considered to be among the safest investments, they are not guaranteed against price movements due to changing interest rates. Obligations issued by some U.S. Government agencies are backed by the U.S. Treasury, while others are backed solely by the ability of the agency to borrow from the U.S. Treasury or by the agency’s own resources.

PMV Adaptive Risk Parity ETF | Asset Allocation Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Asset Allocation Risk — The Fund is subject to asset allocation risk, which is the risk that the selection of the ETPs and direct investments in which it invests and the allocation of the Fund’s assets among the various asset classes and market segments will cause the Fund to underperform other funds with a similar investment objective. The value of an investment in the Fund is based primarily on the prices of the ETPs and direct investments in which the Fund invests. The price of each ETP is based on the value of its assets. The ability of the Fund to meet its investment objective is directly related to its asset allocation among the ETPs and its direct investments and the ability of the ETPs to meet their investment objectives and for the direct investments to perform positively. If the Adviser’s asset allocation strategy does not work as intended, the Fund may not achieve its objective.

PMV Adaptive Risk Parity ETF | Investing in ETPs Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Investing in ETPs Risk — The risks of owning interests of an ETP, such as an ETF or exchange-traded commodity pool, generally reflect the same risks as owning the underlying securities or other instruments that the ETP is designed to track. The shares of certain

ETPs may trade at a premium or discount to their intrinsic value (i.e., the market value may differ from the net asset value (NAV) of an ETP’s shares). For example, supply and demand for shares of an ETF or market disruptions may cause the market price of the ETF to deviate from the value of the ETF’s investments, which may be emphasized in less liquid markets. The value of an Exchange Traded Note (“ETN”) may also differ from the valuation of its reference market or instrument due to changes in the issuer’s credit rating. By investing in an ETP, the Fund indirectly bears the proportionate share of any fees and expenses of the ETP in addition to the fees and expenses that the Fund and its shareholders directly bear in connection with the Fund’s operations. Additionally, the ETPs in which the Fund invests may exit the marketplace or no longer be available for purchase on an exchange and no appropriate substitute may exist, reducing the Adviser’s ability to obtain its desired exposures. Because certain ETPs may have a significant portion of their assets exposed directly or indirectly to commodities or commodity-linked securities, developments affecting commodities may have a disproportionate impact on such ETPs and may subject the ETPs to greater volatility than investments in traditional securities. The Fund is exposed indirectly to the following risks because of its investments in ETPs.

PMV Adaptive Risk Parity ETF | Equity Market Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Equity Market Risk — The risk that stock prices will fall over short or extended periods of time, sometimes rapidly and unpredictably. The value of equity securities will fluctuate in response to factors affecting a particular company, as well as broader market and economic conditions. Broad movements in financial markets may adversely affect the price of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. In addition, the impact of any epidemic, pandemic or natural disaster, or widespread fear that such events may occur, could negatively affect the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the markets in general in significant and unforeseen ways. Any such impact could adversely affect the prices and liquidity of the securities and other instruments in which the Fund is exposed, which in turn could negatively impact the Fund’s performance and cause losses on your investment in the Fund.

PMV Adaptive Risk Parity ETF | Foreign Securities Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Foreign Securities Risk — Investing in foreign companies poses additional risks since political and economic events unique to a country or region will affect those markets and their issuers. These risks will not necessarily affect the U.S. economy or similar issuers

located in the United States. Securities of foreign companies may not be registered with the U.S. Securities and Exchange Commission (the “SEC”) and foreign companies are generally not subject to the same level of regulatory controls imposed on U.S. issuers and, as a consequence, there is generally less publicly available information about foreign securities than is available about domestic securities. Income from foreign securities owned by the Fund may be reduced by a withholding tax at the source. This withholding tax would reduce income received from the securities comprising the Fund’s portfolio. Foreign securities may also be more difficult to value than securities of U.S. issuers and foreign markets and securities may be less liquid. In addition, periodic U.S. Government restrictions on investments in issuers from certain foreign countries may (i) require an ETP to sell such investments at inopportune times or (ii) prohibit an ETP from selling such investments resulting in a deviation from the ETP’s investment objective, which could result in losses.

PMV Adaptive Risk Parity ETF | Emerging Markets Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Emerging Markets Risk — Investments in emerging markets securities are considered speculative and subject to heightened risks in addition to the general risks of investing in foreign securities. Unlike more established markets, emerging markets may have governments that are less stable, markets that are less liquid and economies that are less developed. In addition, the securities markets of emerging market countries may consist of companies with smaller market capitalizations and may suffer periods of relative illiquidity; significant price volatility; restrictions on foreign investment; and possible restrictions on repatriation of investment income and capital. Furthermore, foreign investors may be required to register the proceeds of sales, and future economic or political crises could lead to price controls, forced mergers, expropriation or confiscatory taxation, seizure, nationalization or creation of government monopolies.

PMV Adaptive Risk Parity ETF | Gold Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Gold Risk — Price movements in gold may fluctuate quickly and dramatically, have a historically low correlation with the returns of the stock and bond markets, and may not correlate to price movements in other asset classes. Some factors that impact the price of gold include, but are not limited to, overall market movements, changes in interest rates, changes in the global supply and demand for gold, the quantity of gold imports and exports, factors that impact gold production, such as drought, floods and weather conditions, technological advances in the processing and mining of gold, an increase in the hedging of precious metals, such as gold, and changes in economic and/or political conditions, including regulatory developments.

PMV Adaptive Risk Parity ETF | Large Capitalization Companies Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Large Capitalization Companies Risk — The risk that larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and consumer tastes. Larger companies also may not be able to attain the high growth rates of successful smaller companies.

PMV Adaptive Risk Parity ETF | Momentum Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Momentum Risk —A momentum style of investing may emphasize investing in securities that have had better recent performance compared to other securities. Securities exhibiting marked recent outperformance may be more volatile than securities across the broader market, and momentum may be an indicator that a security’s price is peaking. Momentum can turn quickly and cause significant variation from other types of investments. To the extent it has exposure to momentum strategies, the Fund may experience significant losses if momentum stops, reverses or otherwise behaves differently than predicted.

PMV Adaptive Risk Parity ETF | Tax Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Tax Risk — Income from certain ETPs that invest in commodities and other non-security based asset classes, as well as direct investments in such alternative asset classes, may not be considered qualifying income for purposes of the qualifying income test that must be met by the Fund in order to qualify as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). The Fund will seek to restrict its income

from direct investments in such alternative investments that do not generate qualifying income to a maximum of 10% of its gross income (when combined with its other investments that produce non-qualifying income) to comply with certain qualifying income tests necessary for the Fund to qualify as a RIC under the Code. However, there is no guarantee that the Fund will be successful in this regard. If the Fund fails to qualify as a RIC and to avail itself of certain relief provisions, it would be subject to tax at the regular corporate rate without any deduction for distributions to shareholders, and its distributions would generally be taxable as dividends. Please see the Fund’s Statement of Additional Information (the “SAI”) for a more detailed discussion, including the availability of certain relief provisions for certain failures by the Fund to qualify as a RIC. The tax treatment of certain commodity investments and other non-security based instruments may be affected by future regulatory or legislative changes that could affect the character, timing and/or amount of the Fund’s taxable income or gains and distributions. The Fund’s pursuit of its investment objective will potentially be limited by the Fund’s intention to qualify for treatment as a RIC. The Fund can make certain investments, the treatment of which is unclear under the Code and could adversely affect the Fund’s ability to qualify as a RIC.

PMV Adaptive Risk Parity ETF | Large Purchase and Redemption Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Large Purchase and Redemption Risk — Large purchases or redemptions of the Fund’s shares may force the Fund to purchase or sell securities at times when it would not otherwise do so, and may cause the Fund’s portfolio turnover rate and transaction costs to rise, which may negatively affect the Fund’s performance and have adverse tax consequences for Fund shareholders.

PMV Adaptive Risk Parity ETF | Quantitative Investing Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Quantitative Investing Risk — Funds that are managed according to a quantitative model can perform differently from the market as a whole based on the inputs used in the model (e.g., asset correlation, standard deviation, and market price return), the weight placed on each input, and changes from the inputs’ historical trends. Due to the significant role technology plays in a quantitative model, use of a quantitative model carries the risk of potential issues with the design, coding, implementation or maintenance of the computer programs, data and/or other technology used in the quantitative model. These issues could negatively impact investment returns.

PMV Adaptive Risk Parity ETF | Management Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Management Risk — As an actively-managed ETF, the Fund is subject to management risk. The ability of the Adviser to successfully implement the Fund’s investment strategies will significantly influence the Fund’s performance. The success of the

Fund will depend in part upon the skill and expertise of certain key personnel of the Adviser, and there can be no assurance that any such personnel will continue to be associated with the Adviser.

PMV Adaptive Risk Parity ETF | Operational Risk    
Prospectus [Line Items]    
Risk [Text Block]  

Operational Risk — The Fund, the Adviser, the Sub-Adviser and each of their service providers may experience disruptions that arise from human error, processing and communications errors, counterparty or third-party errors, technology, or systems failures, any of which may have an adverse impact on the Fund.

PMV Adaptive Risk Parity ETF | Risk Lose Money [Member]    
Prospectus [Line Items]    
Risk [Text Block] You could lose money by investing in the Fund.  
PMV Adaptive Risk Parity ETF | Risk Not Insured Depository Institution [Member]    
Prospectus [Line Items]    
Risk [Text Block] A Fund share is not a bank deposit and it is not insured or guaranteed by the FDIC or any other government agency.