Investment Risks |
Jul. 31, 2026 |
|---|---|
| STF Tactical Growth & Income ETF | Cybersecurity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cybersecurity Risk. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets or proprietary information, or cause the Fund, the Adviser, and/or other service providers (including custodians and financial intermediaries) to suffer data breaches or data corruption. Additionally, cybersecurity failures or breaches of the electronic systems of the Fund, the Adviser, the Fund’s other service providers, market makers, Authorized Participants (“APs”), the Fund’s primary listing exchange, or the issuers of securities in which the Fund invests have the ability to disrupt and negatively affect the Fund’s business operations, including the ability to purchase and sell Shares, potentially resulting in financial losses to the Fund and its shareholders. |
| STF Tactical Growth & Income ETF | Derivatives Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Securities Risk. The Fund invests in options that derive their performance from the performance of one or more indexes that comprise the equity securities held by the Fund. Derivatives, such as the options in which the Fund invests, can be volatile and involve various types and degrees of risks, depending upon the characteristics of a particular derivative. Derivatives may entail investment exposures that are greater than their cost would suggest, meaning that a small investment in a derivative could have a substantial impact on the performance of the Fund. The Fund could experience a loss if its derivatives do not perform as anticipated, or are not correlated with the performance of their underlying asset or if the Fund is unable to purchase or liquidate a position because of an illiquid secondary market. The market for many derivatives is, or suddenly can become, illiquid. Changes in liquidity may result in significant, rapid, and unpredictable changes in the prices for derivatives. ◦Options Risk. Selling (writing) and buying options are speculative activities and entail greater than ordinary investment risks. The Fund’s use of put options can lead to losses because of adverse movements in the price or value of the underlying asset, which may be magnified by certain features of the options. When selling a put option, the Fund will receive a premium; however, this premium may not be enough to offset a loss incurred by the Fund if the price of the underlying asset is below the strike price by an amount equal to or greater than the premium. Purchasing of put options involves the payment of premiums, which may adversely affect the Fund’s performance. Purchasing a put option gives the purchaser of the option the right to sell a specified quantity of an underlying asset at a fixed exercise price over a defined period of time. Purchased put options may expire worthless resulting in the Fund’s loss of the premium it paid for the option. The value of an option may be adversely affected if the market for the option becomes less liquid or smaller, and will be affected by changes in the value or yield of the option’s underlying asset, an increase in interest rates, a change in the actual or perceived volatility of the stock market or the underlying asset and the remaining time to expiration. Additionally, the value of an option does not increase or decrease at the same rate as the underlying asset. The Fund’s use of options may reduce the Fund’s ability to profit from increases in the value of the underlying asset. If the price of the underlying asset of an option is above the strike price of a written put option, the value of the option, and consequently of the Fund, may decline significantly more than if the Fund invested directly in the underlying asset instead of using options. While the Fund will limit its leverage risk based on its value-at-risk test (or “VaR”), the Fund could still lose a significant amount or nearly all of its value if the price of an underlying asset changes significantly enough.
|
| STF Tactical Growth & Income ETF | Derivatives Securities Risk, Options Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Options Risk. Selling (writing) and buying options are speculative activities and entail greater than ordinary investment risks. The Fund’s use of put options can lead to losses because of adverse movements in the price or value of the underlying asset, which may be magnified by certain features of the options. When selling a put option, the Fund will receive a premium; however, this premium may not be enough to offset a loss incurred by the Fund if the price of the underlying asset is below the strike price by an amount equal to or greater than the premium. Purchasing of put options involves the payment of premiums, which may adversely affect the Fund’s performance. Purchasing a put option gives the purchaser of the option the right to sell a specified quantity of an underlying asset at a fixed exercise price over a defined period of time. Purchased put options may expire worthless resulting in the Fund’s loss of the premium it paid for the option. The value of an option may be adversely affected if the market for the option becomes less liquid or smaller, and will be affected by changes in the value or yield of the option’s underlying asset, an increase in interest rates, a change in the actual or perceived volatility of the stock market or the underlying asset and the remaining time to expiration. Additionally, the value of an option does not increase or decrease at the same rate as the underlying asset. The Fund’s use of options may reduce the Fund’s ability to profit from increases in the value of the underlying asset. If the price of the underlying asset of an option is above the strike price of a written put option, the value of the option, and consequently of the Fund, may decline significantly more than if the Fund invested directly in the underlying asset instead of using options. While the Fund will limit its leverage risk based on its value-at-risk test (or “VaR”), the Fund could still lose a significant amount or nearly all of its value if the price of an underlying asset changes significantly enough.
|
| STF Tactical Growth & Income ETF | Equity Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | •Equity Securities Risk. 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, sectors or companies in which the Fund invests. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change. Preferred stocks are subject to the risk that the dividend on the stock may be changed or omitted by the issuer, and that participation in the growth of an issuer may be limited. |
| STF Tactical Growth & Income ETF | ETF Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ETF Risks. The Fund is an ETF and, as a result of its structure, is exposed to the following risks: ◦Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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. ◦Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., short positions and derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. ◦Costs of Buying or Selling Shares Risk. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments. ◦Shares May Trade at Prices Other Than NAV Risk. 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. ◦Trading Risk. Although Shares are listed for trading on 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 underlying portfolio holdings, which can be significantly less liquid than the Shares.
|
| STF Tactical Growth & Income ETF | ETF Risks, 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 may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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. |
| STF Tactical Growth & Income ETF | ETF Risks, Cash Redemption Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cash Redemption Risk. The Fund’s investment strategy may require it to redeem Shares for cash or to otherwise include cash as part of its redemption proceeds. For example, the Fund may not be able to redeem in-kind certain securities held by the Fund (e.g., short positions and derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. |
| STF Tactical Growth & Income ETF | ETF Risks, Costs of Buying Or Selling Shares Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Costs of Buying or Selling Shares Risk. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments. |
| STF Tactical Growth & Income ETF | ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Shares May Trade at Prices Other Than NAV Risk. 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. |
| STF Tactical Growth & Income ETF | ETF Risks, Trading Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Trading Risk. Although Shares are listed for trading on 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 underlying portfolio holdings, which can be significantly less liquid than the Shares. |
| STF Tactical Growth & Income ETF | Fixed Income Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fixed Income Risk. Fixed income securities are debt obligations issued by corporations, municipalities and other borrowers and are subject to various risks, including call, credit, extension and interest rate risks. ◦Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security before its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. ◦Credit Risk. Debt issuers and other counterparties may not honor their obligations or may have their debt downgraded by ratings agencies. ◦Extension Risk. During periods of rising interest rates, certain debt obligations will be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Fund’s income and potentially in the value of the Fund’s investments. ◦Interest Rate Risk. An increase in interest rates may cause the value of fixed-income securities held by the Fund to decline. During periods when interest rates are at low levels, the Fund’s yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis).
|
| STF Tactical Growth & Income ETF | Fixed Income Risk, Call Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security before its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. |
| STF Tactical Growth & Income ETF | Fixed Income Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk. Debt issuers and other counterparties may not honor their obligations or may have their debt downgraded by ratings agencies. |
| STF Tactical Growth & Income ETF | Fixed Income Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk. During periods of rising interest rates, certain debt obligations will be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Fund’s income and potentially in the value of the Fund’s investments. |
| STF Tactical Growth & Income ETF | Fixed Income Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Interest Rate Risk. An increase in interest rates may cause the value of fixed-income securities held by the Fund to decline. During periods when interest rates are at low levels, the Fund’s yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). |
| STF Tactical Growth & Income ETF | Implied Volatility Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Implied Volatility Risk. When the Fund sells an option, it gains the amount of the premium it receives, but also incurs a liability representing the value of the option it has sold until the option is either exercised and finishes “in the money,” meaning it has value and can be sold, or the option expires worthless, or the expiration of the option is “rolled,” or extended forward. The value of the options in which the Fund invests is based partly on the volatility used by market participants to price such options (i.e., implied volatility). Accordingly, increases in the implied volatility of such options will cause the value of such options to increase (even if the prices of the options’ underlying stocks do not change), which will result in a corresponding increase in the liabilities of the Fund under such options and thus decrease the Fund’s NAV. |
| STF Tactical Growth & Income ETF | Management Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and its ability to achieve its investment objective is dependent on the Adviser’s successful implementation of the Fund’s investment strategies. |
| STF Tactical Growth & Income ETF | Manufacturing Sector Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Manufacturing Sector Risk. Companies in the Manufacturing Sector can be significantly affected by supply and demand both for their specific product or service and for Manufacturing Sector products in general; a decline in demand for products due to rapid technological developments and frequent new product introduction; government regulation, world events and economic conditions; and the risks associated with potential environmental damage and product liability claims. |
| STF Tactical Growth & Income ETF | Market Capitalization Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Capitalization Risk. ◦Large-Capitalization Investing Risk. 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 also may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. |
| STF Tactical Growth & Income ETF | Market Capitalization Risk, Large-Capitalization Investing Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large-Capitalization Investing Risk. 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 also may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. |
| STF Tactical Growth & Income ETF | Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The trading prices of securities and other instruments fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. The Fund’s NAV and market price, like security and commodity prices generally, may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. In addition, government actions or interventions (including, but not limited, to the threat or imposition of tariffs, trade restrictions, currency restrictions or similar actions) as well as developments related to economic, political (including geopolitical), social, public health, market, extreme weather, natural or man-made disasters, or other conditions or events have in the past and may in the future result in volatility in financial markets and reduced liquidity in equity, credit, and/or debt markets, which could adversely impact the Fund and its investments and their value and performance. These developments as well as other events could result in further market volatility and negatively affect financial asset prices, the liquidity of certain securities and the normal operations of securities exchanges and other markets. |
| STF Tactical Growth & Income ETF | Models And Data Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Models and Data Risk. When models and data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data. |
| STF Tactical Growth & Income ETF | Other Investment Companies Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Other Investment Companies Risk. The risks of investment in other investment companies, including ETFs, typically reflect the risks of the types of instruments in which the investment companies invest. By investing in another investment company, the Fund becomes a shareholder of that investment company and bears its proportionate share of the fees and expenses of the other investment company. Investments in ETFs are also subject to the “ETF Risks” described above. |
| STF Tactical Growth & Income ETF | Portfolio Turnover Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Portfolio Turnover Risk. Because the Fund may “turn over” some or all of its portfolio frequently, the Fund may incur high levels of transaction costs from commissions or mark-ups in the bid/offer spread. Higher portfolio turnover (e.g., in excess of 100% per year) may result in the Fund paying higher levels of transaction costs and generating greater tax liabilities for shareholders. |
| STF Tactical Growth & Income ETF | Tax Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax Risk. The writing of options by the Fund may significantly reduce or eliminate its ability to make distributions eligible to be treated as qualified dividend income. Options entered into by the Fund may also be subject to the federal tax rules applicable to straddles under the Internal Revenue Code of 1986, as amended (the “Code”). If positions held by the Fund were treated as “straddles” for federal income tax purposes, or the Fund’s risk of loss with respect to a position was otherwise diminished as set forth in Treasury regulations, dividends on stocks that are a part of such positions would not constitute qualified dividend income subject to such favorable income tax treatment in the hands of non-corporate shareholders or eligible for the dividends received deduction for corporate shareholders. In addition, generally, straddles are subject to certain rules that may affect the amount, character, and timing of the Fund’s recognition of gains and losses with respect to straddle positions. |
| STF Tactical Growth & Income ETF | U.S. Treasury Obligations Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. Treasury Obligations Risk. U.S. Treasury obligations may differ from other fixed income securities in their interest rates, maturities, times of issuance and other characteristics. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s U.S. Treasury obligations to decline. |
| STF Tactical Growth & Income ETF | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. |
| STF Tactical Growth & Income ETF | Risk Nondiversified Status [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a lesser number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a lesser number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively small number of issuers to have a greater impact on the Fund’s performance. |
| STF Tactical Growth ETF | Cybersecurity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Cybersecurity Risk. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets or proprietary information, or cause the Fund, the Adviser, and/or other service providers (including custodians and financial intermediaries) to suffer data breaches or data corruption. Additionally, cybersecurity failures or breaches of the electronic systems of the Fund, the Adviser, the Fund’s other service providers, market makers, Authorized Participants (“APs”), the Fund’s primary listing exchange, or the issuers of securities in which the Fund invests have the ability to disrupt and negatively affect the Fund’s business operations, including the ability to purchase and sell Shares, potentially resulting in financial losses to the Fund and its shareholders. |
| STF Tactical Growth ETF | Equity Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk. 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, sectors or companies in which the Fund invests. Common stocks are susceptible to general stock market fluctuations and to volatile increases and decreases in value as market confidence in and perceptions of their issuers change. Preferred stocks are subject to the risk that the dividend on the stock may be changed or omitted by the issuer, and that participation in the growth of an issuer may be limited. |
| STF Tactical Growth ETF | ETF Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ETF Risks. The Fund is an ETF and, as a result of its structure, is exposed to the following risks: ◦Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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. ◦Costs of Buying or Selling Shares Risk. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments. ◦Shares May Trade at Prices Other Than NAV Risk. 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. ◦Trading Risk. Although Shares are listed for trading on 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 underlying portfolio holdings, which can be significantly less liquid than the Shares.
|
| STF Tactical Growth ETF | ETF Risks, 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 may act as APs. In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. Shares may trade at a material discount to NAV and possibly face delisting if either: (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. |
| STF Tactical Growth ETF | ETF Risks, Costs of Buying Or Selling Shares Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Costs of Buying or Selling Shares Risk. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments. |
| STF Tactical Growth ETF | ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Shares May Trade at Prices Other Than NAV Risk. 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. |
| STF Tactical Growth ETF | ETF Risks, Trading Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Trading Risk. Although Shares are listed for trading on 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 underlying portfolio holdings, which can be significantly less liquid than the Shares. |
| STF Tactical Growth ETF | Fixed Income Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fixed Income Risk. Fixed income securities are debt obligations issued by corporations, municipalities and other borrowers and are subject to various risks, including call, credit, extension and interest rate risks. ◦Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security before its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. ◦Credit Risk. Debt issuers and other counterparties may not honor their obligations or may have their debt downgraded by ratings agencies. ◦Extension Risk. During periods of rising interest rates, certain debt obligations will be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Fund’s income and potentially in the value of the Fund’s investments. ◦Interest Rate Risk. An increase in interest rates may cause the value of fixed-income securities held by the Fund to decline. During periods when interest rates are at low levels, the Fund’s yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis).
|
| STF Tactical Growth ETF | Fixed Income Risk, Call Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security before its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. |
| STF Tactical Growth ETF | Fixed Income Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk. Debt issuers and other counterparties may not honor their obligations or may have their debt downgraded by ratings agencies. |
| STF Tactical Growth ETF | Fixed Income Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk. During periods of rising interest rates, certain debt obligations will be paid off substantially more slowly than originally anticipated and the value of those securities may fall sharply, resulting in a decline in the Fund’s income and potentially in the value of the Fund’s investments. |
| STF Tactical Growth ETF | Management Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Management Risk. The Fund is actively managed and its ability to achieve its investment objective is dependent on the Adviser’s successful implementation of the Fund’s investment strategies. |
| STF Tactical Growth ETF | Manufacturing Sector Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Manufacturing Sector Risk. Companies in the Manufacturing Sector can be significantly affected by supply and demand both for their specific product or service and for Manufacturing Sector products in general; a decline in demand for products due to rapid technological developments and frequent new product introduction; government regulation, world events and economic conditions; and the risks associated with potential environmental damage and product liability claims. |
| STF Tactical Growth ETF | Market Capitalization Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Capitalization Risk. ◦Large-Capitalization Investing Risk. 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 also may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. |
| STF Tactical Growth ETF | Market Capitalization Risk, Large-Capitalization Investing Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Large-Capitalization Investing Risk. 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 also may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. |
| STF Tactical Growth ETF | Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The trading prices of securities and other instruments fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. The Fund’s NAV and market price, like security and commodity prices generally, may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. In addition, government actions or interventions (including, but not limited, to the threat or imposition of tariffs, trade restrictions, currency restrictions or similar actions) as well as developments related to economic, political (including geopolitical), social, public health, market, extreme weather, natural or man-made disasters, or other conditions or events have in the past and may in the future result in volatility in financial markets and reduced liquidity in equity, credit, and/or debt markets, which could adversely impact the Fund and its investments and their value and performance. These developments as well as other events could result in further market volatility and negatively affect financial asset prices, the liquidity of certain securities and the normal operations of securities exchanges and other markets. |
| STF Tactical Growth ETF | Models And Data Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Models and Data Risk. When models and data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data. |
| STF Tactical Growth ETF | Other Investment Companies Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Other Investment Companies Risk. The risks of investment in other investment companies, including ETFs, typically reflect the risks of the types of instruments in which the investment companies invest. By investing in another investment company, the Fund becomes a shareholder of that investment company and bears its proportionate share of the fees and expenses of the other investment company. Investments in ETFs are also subject to the “ETF Risks” described above. |
| STF Tactical Growth ETF | Portfolio Turnover Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Portfolio Turnover Risk. Because the Fund may “turn over” some or all of its portfolio frequently, the Fund may incur high levels of transaction costs from commissions or mark-ups in the bid/offer spread. Higher portfolio turnover (e.g., in excess of 100% per year) may result in the Fund paying higher levels of transaction costs and generating greater tax liabilities for shareholders. |
| STF Tactical Growth ETF | U.S. Treasury Obligations Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. Treasury Obligations Risk. U.S. Treasury obligations may differ from other fixed income securities in their interest rates, maturities, times of issuance and other characteristics. Similar to other issuers, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s U.S. Treasury obligations to decline. |
| STF Tactical Growth ETF | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund. |
| STF Tactical Growth ETF | Risk Nondiversified Status [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Non-Diversification Risk. Because the Fund is “non-diversified,” it may invest a greater percentage of its assets in the securities of a single issuer or a lesser number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a lesser number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively small number of issuers to have a greater impact on the Fund’s performance. |