v3.26.1
Investment Risks
Sep. 09, 2026
VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETF, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETF. Investments in the Underlying ETF are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Index, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Index.

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks. 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as Authorized Participants or APs). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.
VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC  (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness. 

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) S&P 500 Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) International Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) International Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) International Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) International Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

 

VistaShares Shield(TM) International Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETF, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETF. Investments in the Underlying ETF are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) International Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Index, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Index.

 

 

VistaShares Shield(TM) International Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) International Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. 

     
VistaShares Shield(TM) International Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks.  

 

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

 

VistaShares Shield(TM) International Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC  (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

  

VistaShares Shield(TM) International Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) International Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) International Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) International Enhanced Protection ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices. Investments in foreign companies securities, including investments via depositary receipts, are subject to special risks, including the following:

 

VistaShares Shield(TM) International Enhanced Protection ETF | Currency Exchange Rate Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Currency Exchange Rate Risk. The Fund’s assets may include exposure to investments denominated in non-U.S. currencies or in securities or other assets that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investments and the value of your Fund shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and give rise to certain additional risks. Depositary receipts listed on U.S. or foreign exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (Underlying Shares). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Developed Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Developed Markets Risk. Developed market countries generally tend to rely on the services sectors (e.g., the financial services sector) as the primary source of economic growth and may be susceptible to the risks of individual service sectors. Many developed market countries have heavy indebtedness, which may lead downward pressure on the economies of these countries. As a result, it is possible that interest rates on debt of certain developed countries may rise to levels that make it difficult for such countries to service high debt levels without significant help from other countries or from a central bank. Developed market countries generally are dependent on the economies of certain key trading partners. Changes in any one economy may cause an adverse impact on several developed countries.

 

VistaShares Shield(TM) International Enhanced Protection ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]

 

Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole. 

 

VistaShares Shield(TM) International Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETF, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETF. Investments in the Underlying ETF are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Index, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Index.

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. 

     
VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks.  

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as Authorized Participants or APs). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.
VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

  

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness.

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices. Investments in foreign companies securities, including investments via depositary receipts, are subject to special risks, including the following:

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Currency Exchange Rate Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Currency Exchange Rate Risk. The Fund’s assets may include exposure to investments denominated in non-U.S. currencies or in securities or other assets that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investments and the value of your Fund shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and give rise to certain additional risks. Depositary receipts listed on U.S. or foreign exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (Underlying Shares). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

 

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]

 

Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole. 

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value.

 

VistaShares Shield(TM) Emerging Markets Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. 

  

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETF, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETF. Investments in the Underlying ETF are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Index, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Index.

 

  

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks. 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as Authorized Participants or APs). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.
VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC. (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

  

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness. 

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies.

 

VistaShares Shield(TM) US Small Cap Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETF, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETF. Investments in the Underlying ETF are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Index, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Index.

  

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks. 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that are authorized to purchase and redeem Shares directly from the Fund (known as Authorized Participants or APs). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services; or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.
VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

  

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness.

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Technology Sector Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Nasdaq 100 Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets. 

 

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETFs, is subject to the risks associated with such Underlying ETFs. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETFs. Investments in the Underlying ETFs are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Index, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Index.

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. 

     
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks.  

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

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness.

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices. Investments in foreign companies securities, including investments via depositary receipts, are subject to special risks, including the following: 

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Currency Exchange Rate Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Currency Exchange Rate Risk. The Fund’s assets may include exposure to investments denominated in non-U.S. currencies or in securities or other assets that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investments and the value of your Fund shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and give rise to certain additional risks. Depositary receipts listed on U.S. or foreign exchanges are issued by banks or trust companies and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (Underlying Shares). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares.
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Developed Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Developed Markets Risk. Developed market countries generally tend to rely on the services sectors (e.g., the financial services sector) as the primary source of economic growth and may be susceptible to the risks of individual service sectors. Many developed market countries have heavy indebtedness, which may lead downward pressure on the economies of these countries. As a result, it is possible that interest rates on debt of certain developed countries may rise to levels that make it difficult for such countries to service high debt levels without significant help from other countries or from a central bank. Developed market countries generally are dependent on the economies of certain key trading partners. Changes in any one economy may cause an adverse impact on several developed countries.
VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]

 

Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole. 

 

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value.

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies. 

 

 

VistaShares Shield(TM) Diversified Equity Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETFs, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETFs. Investments in the Underlying ETFs are also subject to ETF Risks (listed below).

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Underlying ETFs, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Underlying ETFs.

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks.  

 

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

 

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.
VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

  

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness.

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Foreign Securities Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices. Investments in foreign companies securities, including investments via depositary receipts, are subject to special risks, including the following:

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Currency Exchange Rate Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Currency Exchange Rate Risk. The Fund’s assets may include exposure to investments denominated in non-U.S. currencies or in securities or other assets that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investments and the value of your Fund shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

 

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Depositary Receipt Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and give rise to certain additional risks. Depositary receipts listed on U.S. or foreign exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (Underlying Shares). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares.
VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Developed Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Developed Markets Risk. Developed market countries generally tend to rely on the services sectors (e.g., the financial services sector) as the primary source of economic growth and may be susceptible to the risks of individual service sectors. Many developed market countries have heavy indebtedness, which may lead downward pressure on the economies of these countries. As a result, it is possible that interest rates on debt of certain developed countries may rise to levels that make it difficult for such countries to service high debt levels without significant help from other countries or from a central bank. Developed market countries generally are dependent on the economies of certain key trading partners. Changes in any one economy may cause an adverse impact on several developed countries.
VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Mid-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]

 

Mid-Capitalization Investing. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large-capitalization stocks or the stock market as a whole. 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Emerging Markets Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value.

  

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Small-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]

 

Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies. 

  

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Commodity Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Commodity Risk. The Fund’s exposure to the commodities markets may subject the Fund to greater volatility than investments in traditional securities. The value of the Underlying ETFs and commodity-linked derivative instruments 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.

 

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | ETN Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETN Risks. The Fund has indirect exposure to exchange traded notes (“ETNs”) through its investments in the Underlying ETFs. The Fund will not invest directly in ETNs. ETNs are a type of debt instrument that are senior, unsecured, unsubordinated debt securities issued by a financial institution. These notes are designed to provide returns that are linked to a specific benchmark, such as a market index, commodity price, or other financial metrics. ETNs do not provide principal protection, meaning that the return of the original investment amount is not guaranteed. Additionally, unlike traditional fixed-income securities, ETNs may not make periodic coupon payments, which can impact the expected income stream for investors (such as the Fund). 

 

ETNs have a set maturity date, at which point the issuer is expected to pay back the principal amount based on the performance of the linked benchmark. However, the ability of the issuer to meet these obligations is generally backed only by its creditworthiness, without any collateral or other security backing the note. As a result, ETNs are subject to credit risk, which is the risk that the issuer may default on its obligation to pay interest or repay principal when it is due. The creditworthiness of the issuer is therefore a critical factor in assessing the risk of an ETN investment, and any deterioration in the issuer’s credit rating could adversely affect the value of the ETN. 

 

Furthermore, the value of ETNs can be influenced by the performance of the underlying benchmark. If the benchmark performs poorly, the value of the ETN can decrease, even to the point of becoming worthless. This market risk is compounded by the lack of principal protection. Additionally, ETNs are subject to liquidity risk. In some instances, there may be a limited market for trading ETNs, making it difficult for investors (such as the Fund) to buy or sell them at an optimal price. This can be particularly challenging during periods of market stress or volatility.

 

VistaShares Shield(TM) Diversified Commodities Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.
VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Equity Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Derivatives Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Options Contracts [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Counterparty Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Counterparty Risk. To the extent contemplated by its investment strategy, the Fund may use derivative instruments, such as options, swaps, and other instruments, to obtain or manage investment exposure. Derivatives may be subject to counterparty risk, meaning the risk that a counterparty, clearing member or clearing house will be unwilling or unable to perform its obligations to the Fund due to bankruptcy, insolvency, financial distress, operational failure or other default. If a counterparty or clearing member defaults, the Fund may lose the expected benefit of the transaction, experience delays or costs in recovering collateral or other amounts owed to it, or be required to enter into replacement transactions on less favorable terms, if at all. The Fund also may be unable to implement its investment strategy effectively if suitable counterparties or clearing members are unavailable.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Economic and Market Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Economic and Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in the general financial markets, a particular financial market, or other asset classes, due to a number of factors, including inflation (or expectations for inflation), deflation (or expectations for deflation), interest rates, global demand for particular products or resources, market instability, financial system instability, debt crises and downgrades, embargoes, tariffs, sanctions and other trade barriers, regulatory events, other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.

 

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Underlying ETF Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Underlying ETF Risk. The Fund’s investment strategy, involving direct and indirect exposure to the Underlying ETFs, is subject to the risks associated with such Underlying ETF. Shareholders in the Fund bear both their proportionate share of expenses in the Fund and, indirectly, the expenses of the Underlying ETFs. Investments in the Underlying ETFs are also subject to ETF Risks (listed below).

  

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Active Management Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Active Management Risk. The Sub-Adviser will actively monitor the Fund’s holdings and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. In addition, while the Fund seeks to achieve returns similar to those of the Underlying ETFs, there may be periods of time where the Fund’s holdings, and therefore its performance, deviate significantly from the holdings and performance of the Underlying ETFs.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Market Capitalization Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Market Capitalization Risk. 

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Large-Capitalization Investing [Member]  
Prospectus [Line Items]  
Risk [Text Block]
 

Large-Capitalization Investing. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | ETF Risks [Member]  
Prospectus [Line Items]  
Risk [Text Block]

ETF Risks. 

 

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

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Costs of Buying or Selling Shares [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Costs of Buying or Selling Shares. Investors buying or selling Shares in the secondary market will pay brokerage commissions or other charges imposed by brokers, as determined by that broker. Brokerage commissions are often a fixed amount and may be a significant proportional cost for investors seeking to buy or sell relatively small amounts of Shares. In addition, secondary market investors will also incur the cost of the bid-ask spread. The bid-ask spread varies over time for Shares based on trading volume and market liquidity, and is generally lower if Shares have more trading volume and market liquidity and higher if Shares have little trading volume and market liquidity. Further, a relatively small investor base in the Fund, asset swings in the Fund and/or increased market volatility may cause increased bid-ask spreads. Due to the costs of buying or selling Shares, including bid-ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Shares May Trade at Prices Other Than NAV [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of ETFs holding only domestic securities.

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Trading [Member]  
Prospectus [Line Items]  
Risk [Text Block]
  Trading. Although Shares are listed for trading on a national securities exchange, such as The Nasdaq Stock Market, LLC (the Exchange), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s portfolio holdings, which can be significantly less liquid than Shares.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | New Fund Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Newer Sub-Adviser Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

Newer Sub-Adviser Risk. VistaShares is a recently formed entity and has limited experience with managing an exchange-traded fund, which may limit the Sub-Adviser’s effectiveness.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Operational Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | U.S. Government and U.S. Agency Obligations Risk [Member]  
Prospectus [Line Items]  
Risk [Text Block]

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

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Foreign Securities Risk [Member]  
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Foreign Securities Risk. Investments in securities or other instruments of non-U.S. issuers involve certain risks not involved in domestic investments and may experience more rapid and extreme changes in value than investments in securities of U.S. companies. Financial markets in foreign countries often are not as developed, efficient, or liquid as financial markets in the United States, and therefore, the prices of non-U.S. securities and instruments can be more volatile. In addition, the Fund will be subject to risks associated with adverse political and economic developments in foreign countries, which may include the imposition of economic sanctions. Generally, there is less readily available and reliable information about non-U.S. issuers due to less rigorous disclosure or accounting standards and regulatory practices. Investments in foreign companies securities, including investments via depositary receipts, are subject to special risks, including the following:

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Currency Exchange Rate Risk [Member]  
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  Currency Exchange Rate Risk. The Fund’s assets may include exposure to investments denominated in non-U.S. currencies or in securities or other assets that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investments and the value of your Fund shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Depositary Receipt Risk [Member]  
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  Depositary Receipt Risk. Depositary receipts involve risks similar to those associated with investments in foreign securities and give rise to certain additional risks. Depositary receipts listed on U.S. or foreign exchanges are issued by banks or trust companies, and entitle the holder to all dividends and capital gains that are paid out on the underlying foreign shares (Underlying Shares). When the Fund invests in depositary receipts as a substitute for an investment directly in the Underlying Shares, the Fund is exposed to the risk that the depositary receipts may not provide a return that corresponds precisely with that of the Underlying Shares.

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Developed Markets Risk [Member]  
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  Developed Markets Risk. Developed market countries generally tend to rely on the services sectors (e.g., the financial services sector) as the primary source of economic growth and may be susceptible to the risks of individual service sectors. Many developed market countries have heavy indebtedness, which may lead downward pressure on the economies of these countries. As a result, it is possible that interest rates on debt of certain developed countries may rise to levels that make it difficult for such countries to service high debt levels without significant help from other countries or from a central bank. Developed market countries generally are dependent on the economies of certain key trading partners. Changes in any one economy may cause an adverse impact on several developed countries.

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

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Emerging Markets Risk [Member]  
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  Emerging Markets Risk. The Fund may invest in securities issued by companies domiciled or headquartered in emerging market nations. Investments in securities traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, currency, or regulatory conditions not associated with investments in U.S. securities and investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Fund Shares and cause the Fund to decline in value.

  

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Small-Capitalization Investing [Member]  
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Small-Capitalization Investing. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large- or mid-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large- or mid-capitalization stocks or the stock market as a whole. There is typically less publicly available information concerning smaller-capitalization companies than for larger, more established companies. 

 

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Fixed Income Risk [Member]  
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Fixed Income Risk. The prices of fixed income securities respond to economic developments, particularly interest rate changes, as well as to changes in an issuer’s credit rating or market perceptions about the creditworthiness of an issuer. In general, the market price of fixed income securities with longer maturities will increase or decrease more in response to changes in interest rates than shorter-term securities. Changes in government intervention may have adverse effects on investments, volatility, and illiquidity in debt markets. These changes could cause the Fund’s net asset value to fluctuate or make it more difficult for the Fund to accurately value its securities. How specific fixed income securities may react to changes in interest rates will depend on the specific characteristics of each security.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Credit Risks [Member]  
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  Credit Risk. Bonds are subject to credit risk. Credit risk refers to the possibility that the issuer or guarantor of a security will be unable and/or unwilling to make timely interest payments and/or repay the principal on its debt or to otherwise honor its obligations and/or default completely. Bonds are subject to varying degrees of credit risk, depending on the issuer’s financial condition and on the terms of the securities, which may be reflected in credit ratings. There is a possibility that the credit rating of a bond may be downgraded after purchase or the perception of an issuer’s credit worthiness may decline, which may adversely affect the value of the security.

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | High Yield Securities Risk [Member]  
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Risk [Text Block]
  High Yield Securities Risk. High yield bonds are considered speculative investments and are issued by entities that may be undergoing restructuring, are smaller or less creditworthy, or are more heavily indebted than other issuers. These bonds carry a greater risk of income and principal loss compared to higher-rated securities and are considered speculative. Their prices are more likely to react to adverse economic changes than higher-rated securities. During economic downturns or significant increases in interest rates, issuers of high-yield bonds may face financial difficulties, impacting their ability to meet payment obligations or secure additional financing.

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Interest Rate Risks [Member]  
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  Interest Rate Risk. Generally, the value of fixed income securities will change inversely with changes in interest rates. As interest rates rise, the market value of fixed income securities tends to decrease. Conversely, as interest rates fall, the market value of fixed income securities tends to increase. This risk will be greater for long-term securities than for short-term securities. In addition, the interest rates payable on floating rate securities are not fixed and may fluctuate based upon changes in market rates. The interest rate on a floating rate security is a variable rate which is tied to another interest rate. Floating rate securities are subject to interest rate risk and credit risk.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Utilities Sector Risk [Member]  
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Utilities Sector Risk. Investments in the utilities sector at times may be limited to a relatively small number of issuers. Such investments may therefore be subject to greater risks and market fluctuations than a portfolio representing a broader range of industries. As an example of these risks, companies in the telecommunications and electric utilities industries have experienced substantial changes in the amount and type of regulation at the state and federal levels. While creating opportunities for some companies, it also has increased uncertainty for others with respect to future revenues and earnings. This trend may continue for some time and increased share price volatility may result. In addition, utilities companies may be significantly affected by government regulation, supply and demand of services or fuel, availability of financing, tax laws and regulations and environmental issues.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Real Estate Risk [Member]  
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Real Estate Risk. The Fund’s investments in Underlying ETFs that invest in real estate securities have many of the same risks as direct ownership of real estate, including the risk that the value of the real estate could decline due to a variety of factors that affect the real estate market generally. Investment in real estate investment trusts, or REITs, may have additional risks. REITs are dependent on the capability of their managers, may have limited diversification, and could be significantly affected by changes in taxes. Some REITs may utilize leverage, which increases investment risk and may potentially increase the Fund’s losses.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Distribution Risk [Member]  
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Distribution Risk. The Fund seeks to provide monthly cash distributions. The amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, the monthly distributions may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment. Because a portion of the Fund’s distributions may consist of return of capital, the Fund may not be an appropriate investment for investors who do not want their principal investment in the Fund to decrease over time or who do not wish to receive return of capital in a given period. In the event that a shareholder purchases Fund Shares shortly before a distribution by the Fund, the entire distribution may be taxable to the shareholder even though a portion of the distribution effectively represents a return of the purchase price.

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | High Dividend Style Risk [Member]  
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High Dividend Style Risk. While the Fund intends to invest in Underlying ETFs that track market sectors which have historically paid a high dividend yield, there is no guarantee that will continue in the future. Past dividend payments are not a guarantee of future dividend payments. Also, the market return of high dividend yield securities, in certain market conditions, may be worse than the market return of other investment strategies or the overall stock market.

 

 

VistaShares Shield(TM) Diversified Income Enhanced Protection ETF | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] The Fund may not achieve its investment objective and there is a risk that you could lose all of your money invested in the Fund.