Investment Risks |
Aug. 26, 2025 |
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YieldMax(R) AFRM Option Income Strategy ETF | AFRM Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | AFRM Risk. The Fund invests in instruments that are based on the value of AFRM. This subjects the Fund to certain of the same risks as if it owned shares of AFRM, even if it does not. By virtue of the Fund’s exposure to AFRM, the Fund may also be subject to the following risks:
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YieldMax(R) AFRM Option Income Strategy ETF | Indirect Investment in AFRM Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in AFRM Risk. AFRM is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of AFRM but will be exposed to the performance of AFRM (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) AFRM Option Income Strategy ETF | AFRM Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | AFRM Trading Risk. The trading price of AFRM may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading AFRM, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence AFRM’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of AFRM, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) AFRM Option Income Strategy ETF | AFRM Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | AFRM Performance Risk. AFRM may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of AFRM to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance AFRM provides may not ultimately be accurate. If AFRM’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by AFRM could decline significantly.
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YieldMax(R) AFRM Option Income Strategy ETF | Financial Services Industry Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Financial Services Industry Risk. Financial services companies are subject to extensive governmental regulation which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees they can charge, the scope of their activities, the prices they can charge and the amount of capital they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may cause an adverse impact in a broad range of markets, including U.S. and international credit and interbank money markets generally, thereby affecting a wide range of financial institutions and markets. Certain events in the financial industry may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations. Credit losses resulting from financial difficulties of borrowers and financial losses associated with investment activities can negatively impact the industry. Insurance companies may be subject to severe price competition. Adverse economic, business or political developments could adversely affect financial institutions engaged in mortgage finance or other lending or investing activities directly or indirectly connected to the value of real estate.
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YieldMax(R) AFRM Option Income Strategy ETF | Competitive Industry Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Competitive Industry Risk. AFRM operates in a highly competitive and dynamic industry. AFRM’s technology platform faces competition from a variety of players, including those who enable transactions and commerce via digital payments. AFRM’s primary competition consists of: legacy payment methods, such as credit and debit cards, including those provided by established card issuing banks; technology solutions provided by payment companies; mobile wallets; and pay-over-time offerings by legacy financial and payments companies. Additionally, some merchants are increasingly offering proprietary pay-over-time options to consumers. AFRM expects competition to intensify in the future, especially as the pay-over-time industry has low barriers to entry, both as emerging technologies continue to enter the marketplace and as large financial incumbents increasingly seek to innovate the services that they offer to compete with AFRM’s platform. Technological advances and the continued growth of e-commerce activities have increased consumers’ accessibility to products and services and led to the expansion of competition in digital payment options such as pay-over-time solutions. AFRM’s pay-over-time offerings are increasingly presented alongside competitor options, including merchants’ proprietary pay-over-time options, at checkout, and AFRM expects this trend to continue.
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YieldMax(R) AFRM Option Income Strategy 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:
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YieldMax(R) AFRM Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) AFRM Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) AFRM Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) AFRM Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) AFRM Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) AFRM Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AFRM Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) AFRM Option Income Strategy 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.
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YieldMax(R) AFRM Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) AFRM Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) AFRM Option Income Strategy 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.
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YieldMax(R) AFRM Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) AFRM Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AFRM Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) AFRM Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AFRM Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) AFRM Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) AFRM Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) AFRM Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) AFRM Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) AFRM Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) AFRM Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) AFRM Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) AFRM Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) AFRM Option Income Strategy 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.
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YieldMax(R) AFRM Option Income Strategy 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. | |||
YieldMax(R) AFRM Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) APP Option Income Strategy 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:
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YieldMax(R) APP Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) APP Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) APP Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) APP Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) APP Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) APP Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) APP Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) APP Option Income Strategy 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.
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YieldMax(R) APP Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) APP Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) APP Option Income Strategy 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.
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YieldMax(R) APP Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) APP Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) APP Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) APP Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) APP Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) APP Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) APP Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) APP Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) APP Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) APP Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) APP Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) APP Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) APP Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) APP Option Income Strategy 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.
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YieldMax(R) APP Option Income Strategy ETF | APP Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | APP Risk. The Fund invests in instruments that are based on the value of APP. This subjects the Fund to certain of the same risks as if it owned shares of APP, even if it does not. By virtue of the Fund’s exposure to APP, the Fund may also be subject to the following risks:
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YieldMax(R) APP Option Income Strategy ETF | Indirect Investment in APP Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in APP Risk. APP is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of APP but will be exposed to the performance of APP (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) APP Option Income Strategy ETF | APP Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | APP Trading Risk. The trading price of APP may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading APP, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence APP’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of APP, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) APP Option Income Strategy ETF | APP Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | APP Performance Risk. APP may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of APP to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance APP provides may not ultimately be accurate. If APP’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by APP could decline significantly.
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YieldMax(R) APP Option Income Strategy ETF | Software Industry Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Software Industry Risk. The software industry can be significantly affected by intense competition, aggressive pricing, technological innovations, and product obsolescence. Companies in the software industry are subject to significant competitive pressures, such as aggressive pricing, new market entrants, competition for market share, short product cycles due to an accelerated rate of technological developments and the potential for limited earnings and/or falling profit margins. These companies also face the risks that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. These factors can affect the profitability of these companies and, as a result, the value of their securities. Also, patent protection is integral to the success of many companies in this industry, and profitability can be affected materially by, among other things, the cost of obtaining (or failing to obtain) patent approvals, the cost of litigating patent infringement and the loss of patent protection for products (which significantly increases pricing pressures and can materially reduce profitability with respect to such products). In addition, many software companies have limited operating histories. Prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
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YieldMax(R) APP Option Income Strategy ETF | Computer Programming Company Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Computer Programming Company Risks. The Fund’s performance is subject to the risks of the computer programming companies. Such companies provide social networking, file sharing, and other web-based media applications. The risks related to investing in such companies include disruption in service caused by hardware or software failure, interruptions or delays in service by third-party data center hosting facilities and maintenance providers, security breaches involving certain private, sensitive, proprietary and confidential information managed and transmitted by social media companies, and privacy concerns and laws, evolving internet regulation and other foreign or domestic regulations that may limit or otherwise affect the operations of such companies. Additionally, the collection of data from consumers and other sources could face increased scrutiny as regulators consider how the data is collected, stored, safeguarded and used. Furthermore, the business models employed by these companies may not prove to be successful.
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YieldMax(R) APP Option Income Strategy 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. | |||
YieldMax(R) APP Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) ARM Option Income Strategy 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:
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YieldMax(R) ARM Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) ARM Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) ARM Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) ARM Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) ARM Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) ARM Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) ARM Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) ARM Option Income Strategy 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.
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YieldMax(R) ARM Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) ARM Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) ARM Option Income Strategy 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.
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YieldMax(R) ARM Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) ARM Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) ARM Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) ARM Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) ARM Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) ARM Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) ARM Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) ARM Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) ARM Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) ARM Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) ARM Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) ARM Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) ARM Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) ARM Option Income Strategy 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.
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YieldMax(R) ARM Option Income Strategy ETF | ARM Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ARM Risk. The Fund invests in instruments that are based on the value of ARM. This subjects the Fund to certain of the same risks as if it owned shares of ARM, even if it does not. By virtue of the Fund’s exposure to ARM, the Fund may also be subject to the following risks:
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YieldMax(R) ARM Option Income Strategy ETF | Indirect Investment in ARM Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in ARM Risk. ARM is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of ARM but will be exposed to the performance of ARM (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) ARM Option Income Strategy ETF | ARM Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ARM Trading Risk. The trading price of ARM may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading ARM, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence ARM’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of ARM, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) ARM Option Income Strategy ETF | ARM Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ARM Performance Risk. ARM may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of ARM to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance ARM provides may not ultimately be accurate. If ARM’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by ARM could decline significantly.
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YieldMax(R) ARM Option Income Strategy ETF | Semiconductor Industry Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Semiconductor Industry Risks: Competitive pressures may have a significant effect on the financial condition of semiconductor companies and, as product cycles shorten and manufacturing capacity increases, these companies may become increasingly subject to aggressive pricing, which hampers profitability. Reduced demand for end-user products, under-utilization of manufacturing capacity, and other factors could adversely impact the operating results of companies in the semiconductor sector. Semiconductor companies typically face high capital costs and may be heavily dependent on intellectual property rights. The semiconductor sector is highly cyclical, which may cause the operating results of many semiconductor companies to vary significantly. The stock prices of companies in the semiconductor sector have been and likely will continue to be extremely volatile.
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YieldMax(R) ARM Option Income Strategy ETF | Softbank Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Softbank Risk: SoftBank Group beneficially owns a majority of the total voting power of ARM’s ordinary shares. As a result of SoftBank Group’s ownership, ARM is a “controlled company” under the Nasdaq corporate governance standards. As long as SoftBank Group controls ARM, other holders of ARM’s shares will have limited ability to influence matters requiring shareholder approval or the composition of ARM’s Board of Directors. In addition, the interests of SoftBank Group may not coincide with ARM’s own interests or the interests of holders of ARM’s shares. SoftBank Group may cause ARM to take corporate actions, including engaging in transactions with SoftBank Group or affiliates of SoftBank Group, that members of ARM’s management or other shareholders do not view as beneficial, or that provide SoftBank Group with benefits at ARM’s expense. Such actions could have a material and adverse effect on ARM’s business and results of operations.
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YieldMax(R) ARM Option Income Strategy ETF | Foreign Investment Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Foreign Investment Risk. Because the Fund has indirect exposure to the ADR of a foreign company, the Fund may be subject to risks associated with foreign investments.
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YieldMax(R) ARM Option Income Strategy ETF | Currency Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ●Currency Risk: Indirect exposure to foreign currencies subjects the Fund to the risk that currencies will decline in value relative to the U.S. dollar. Currency rates in foreign countries may fluctuate significantly over short periods of time for a number of reasons, including changes in interest rates and the imposition of currency controls or other political developments in the U.S. or abroad.
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YieldMax(R) ARM Option Income Strategy ETF | Depositary Receipts Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ●Depositary Receipts Risk: Investment in ADRs may be less liquid than the underlying shares in their primary trading market.
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YieldMax(R) ARM Option Income Strategy ETF | Foreign Market and Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ●Foreign Market and Trading Risk: The trading markets for many foreign securities are not as active as U.S. markets and may have less governmental regulation and oversight.
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YieldMax(R) ARM Option Income Strategy ETF | Foreign Securities Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ●Foreign Securities Risk: Investments in securities of non-U.S. issuers involve certain risks that may not be present with investments in securities of U.S. issuers, such as risk of loss due to foreign currency fluctuations or to political or economic instability, as well as varying regulatory requirements applicable to investments in non-U.S. issuers. There may be less information publicly available about a non-U.S. issuer than a U.S. issuer. Non-U.S. issuers may also be subject to different regulatory, accounting, auditing, financial reporting and investor protection standards than U.S. issuers.
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YieldMax(R) ARM Option Income Strategy 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. | |||
YieldMax(R) ARM Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) AVGO Option Income Strategy 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:
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YieldMax(R) AVGO Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) AVGO Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) AVGO Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) AVGO Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) AVGO Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) AVGO Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AVGO Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) AVGO Option Income Strategy 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.
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YieldMax(R) AVGO Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) AVGO Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) AVGO Option Income Strategy 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.
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YieldMax(R) AVGO Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) AVGO Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AVGO Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) AVGO Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AVGO Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) AVGO Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) AVGO Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) AVGO Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) AVGO Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) AVGO Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) AVGO Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) AVGO Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) AVGO Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) AVGO Option Income Strategy 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.
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YieldMax(R) AVGO Option Income Strategy ETF | AVGO Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | AVGO Risk. The Fund invests in instruments that are based on the value of AVGO. This subjects the Fund to certain of the same risks as if it owned shares of AVGO, even if it does not. By virtue of the Fund’s exposure to AVGO, the Fund may also be subject to the following risks:
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YieldMax(R) AVGO Option Income Strategy ETF | Indirect Investment in AVGO Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in AVGO Risk. AVGO is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of AVGO but will be exposed to the performance of AVGO (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) AVGO Option Income Strategy ETF | AVGO Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | AVGO Trading Risk. The trading price of AVGO may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading AVGO, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence AVGO’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of AVGO, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) AVGO Option Income Strategy ETF | AVGO Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | AVGO Performance Risk. AVGO may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of AVGO to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance AVGO provides may not ultimately be accurate. If AVGO’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by AVGO could decline significantly.
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YieldMax(R) AVGO Option Income Strategy ETF | Business and Operational Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Business and Operational Risks. AVGO faces numerous business and operational risks, including adverse global economic conditions that could negatively impact operations. Compliance with governmental regulations and trade restrictions may result in significant expenses, and failure to comply could lead to the cessation of product manufacture and distribution, administrative proceedings, and civil or criminal penalties. Global political and economic instability, along with the failure to realize expected benefits from the VMware Merger, further pose challenges. The company also encounters risks related to acquisitions, investments, joint ventures, and dispositions, which could adversely affect financial results. Additionally, dependency on senior management and the ability to attract and retain qualified personnel are critical to executing AVGO’s business strategy effectively.
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YieldMax(R) AVGO Option Income Strategy ETF | Technological and Cybersecurity Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Technological and Cybersecurity Risks. AVGO is subject to technological and cybersecurity risks, including potential impairments to the confidentiality, integrity, or availability of IT systems and those of corporate infrastructure vendors, which could have a material adverse effect on the business. Operating in the highly cyclical semiconductor industry, AVGO’s sales are largely dependent on a small number of customers, and any reduction in demand or loss of significant customers could adversely affect the business. Reliance on contract manufacturing and suppliers of critical components within the supply chain, along with the need to purchase materials from a limited number of suppliers, may impact AVGO’s ability to bring products to market. Furthermore, failure to adjust manufacturing and supply chains to meet customer demand accurately could adversely affect operational results.
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YieldMax(R) AVGO Option Income Strategy ETF | Legal, Environmental, and Market Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Legal, Environmental, and Market Risks. AVGO is involved in various legal proceedings, including intellectual property, securities litigation, and employee-related claims, which could adversely affect the business. The company’s growth in the software segment depends on customer acceptance of newer products and services, and incompatibility with operating environments or third-party products could decrease demand. Failure to enter into satisfactory software license agreements and the availability of licensed third-party software are additional concerns. Environmental, social, and governance (ESG) matters, compliance with privacy and data security laws, and adherence to environmental, health, and safety regulations could increase costs and restrict operations. Rapidly decreasing average selling prices of semiconductor products and fluctuations in foreign exchange rates also pose significant risks.
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YieldMax(R) AVGO Option Income Strategy ETF | Financial and Stock-Related Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) AVGO Option Income Strategy 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. | |||
YieldMax(R) AVGO Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) CRWD Option Income Strategy 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:
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YieldMax(R) CRWD Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) CRWD Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) CRWD Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) CRWD Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) CRWD Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) CRWD Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) CRWD Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) CRWD Option Income Strategy 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.
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YieldMax(R) CRWD Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) CRWD Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) CRWD Option Income Strategy 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.
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YieldMax(R) CRWD Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) CRWD Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) CRWD Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) CRWD Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) CRWD Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) CRWD Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) CRWD Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) CRWD Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) CRWD Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) CRWD Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) CRWD Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) CRWD Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) CRWD Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) CRWD Option Income Strategy 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.
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YieldMax(R) CRWD Option Income Strategy ETF | Software Industry Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Software Industry Risk. The software industry can be significantly affected by intense competition, aggressive pricing, technological innovations, and product obsolescence. Companies in the software industry are subject to significant competitive pressures, such as aggressive pricing, new market entrants, competition for market share, short product cycles due to an accelerated rate of technological developments and the potential for limited earnings and/or falling profit margins. These companies also face the risks that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. These factors can affect the profitability of these companies and, as a result, the value of their securities. Also, patent protection is integral to the success of many companies in this industry, and profitability can be affected materially by, among other things, the cost of obtaining (or failing to obtain) patent approvals, the cost of litigating patent infringement and the loss of patent protection for products (which significantly increases pricing pressures and can materially reduce profitability with respect to such products). In addition, many software companies have limited operating histories. Prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
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YieldMax(R) CRWD Option Income Strategy ETF | CRWD Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | CRWD Risk. The Fund invests in instruments that are based on the value of CRWD. This subjects the Fund to certain of the same risks as if it owned shares of CRWD, even if it does not. By virtue of the Fund’s exposure to CRWD, the Fund may also be subject to the following risks:
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YieldMax(R) CRWD Option Income Strategy ETF | Indirect Investment in CRWD Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in CRWD Risk. CRWD is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of CRWD but will be exposed to the performance of CRWD (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) CRWD Option Income Strategy ETF | CRWD Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | CRWD Trading Risk. The trading price of CRWD may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading CRWD, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence CRWD’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of CRWD, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) CRWD Option Income Strategy ETF | CRWD Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | CRWD Performance Risk. CRWD may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of CRWD to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance CRWD provides may not ultimately be accurate. If CRWD’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by CRWD could decline significantly.
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YieldMax(R) CRWD Option Income Strategy ETF | Adverse Event Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Adverse Event Risk. On July 19, 2024, CRWD released a content configuration update for its software that resulted in system crashes for certain Windows systems (the “July 19 Incident”). CRWD has incurred, and expects to continue to incur, significant costs and expenses related to the incident, including in connection with remediation efforts, customer and partner relations, measures taken to address the damage to its reputation, and other measures taken in response to the incident. CRWD’s management and other personnel have devoted, and may continue to devote, significant time and resources to address the impacts of the July 19 Incident. CRWD also has hired, and in the future may hire, additional personnel to assist with its ongoing efforts. Any real or perceived failure, by CRWD or the third-party service providers CRWD engages, to remediate and respond to the July 19 Incident could adversely impact CRWD’s business. While CRWD is investing in enhancements to software resiliency, testing and customer controls following the July 19 Incident, CRWD cannot guarantee that such enhancements will be effective, or that its products do not have or will not have defects, errors, or vulnerabilities.
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YieldMax(R) CRWD Option Income Strategy ETF | Cyber Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Cyber Risk. As a provider of security solutions, CRWD has in the past been, and may in the future be, specifically targeted by bad actors for attacks intended to circumvent CRWD’s security capabilities or to exploit CRWD’s platform as an entry point into customers’ endpoints, networks, or systems. In particular, because CRWD has been involved in the identification of organized cybercriminals and nation-state actors, CRWD has been the subject of intense efforts by sophisticated cyber adversaries who seek to compromise its systems. Such efforts may also intensify as geopolitical tensions increase.
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YieldMax(R) CRWD Option Income Strategy 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. | |||
YieldMax(R) CRWD Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) GME Option Income Strategy 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:
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YieldMax(R) GME Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) GME Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) GME Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) GME Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) GME Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) GME Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) GME Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) GME Option Income Strategy 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.
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YieldMax(R) GME Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) GME Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) GME Option Income Strategy 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.
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YieldMax(R) GME Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) GME Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) GME Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) GME Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) GME Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) GME Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) GME Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) GME Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) GME Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) GME Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) GME Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) GME Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) GME Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) GME Option Income Strategy 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.
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YieldMax(R) GME Option Income Strategy ETF | GME Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | GME Risk. The Fund invests in instruments that are based on the value of GME. This subjects the Fund to certain of the same risks as if it owned shares of GME, even if it does not. By virtue of the Fund’s exposure to GME, the Fund may also be subject to the following risks:
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YieldMax(R) GME Option Income Strategy ETF | Indirect Investment in GME Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in GME Risk. GME is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of GME but will be exposed to the performance of GME (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) GME Option Income Strategy ETF | GME Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | GME Trading Risk. The trading price of GME may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading GME, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence GME’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of GME, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) GME Option Income Strategy ETF | GME Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | GME Performance Risk. GME may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of GME to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance GME provides may not ultimately be accurate. If GME’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by GME could decline significantly.
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YieldMax(R) GME Option Income Strategy ETF | Video Gaming and eSports Companies Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Video Gaming and eSports Companies Risk. The Fund will be sensitive to, and its performance may depend to a greater extent on, the overall condition of video gaming and eSports companies. Video gaming and eSports companies face intense competition, both domestically and internationally, may have limited product lines, markets, financial resources, or personnel, may have products that face rapid obsolescence, and are heavily dependent on the protection of patent and intellectual property rights. Video gaming companies may be dependent on one or a small number of product or product franchises for a significant portion of their revenue and profits. They may also be subject to shifting consumer preferences, including preferences with respect to gaming console platforms, and changes in consumer discretionary spending. Such factors may adversely affect the profitability and value of video gaming and eSports companies. Video gaming companies are also subject to increasing regulatory constraints, particularly with respect to cybersecurity and privacy, and may be subject to sophisticated intellectual property infringement schemes and piracy efforts.
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YieldMax(R) GME Option Income Strategy ETF | Bitcoin Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Bitcoin Risk. GME’s Board of Directors has approved the addition of bitcoin as a treasury reserve asset, whereby a portion of GME’s cash or future debt and equity issuances may be invested in bitcoin. While the Fund will not directly invest in digital assets, it may be subject to the risks associated with bitcoin by virtue of its investments in options contracts that reference GME. Investing in bitcoin exposes shareholders (such as GME) to significant risks that are not typically present in other investments. These risks include the uncertainty surrounding new technology, limited evaluation due to bitcoin’s short trading history, and the potential decline in adoption and value over the long term. The extreme volatility of bitcoin’s price is also a risk factor. Regulatory uncertainties, such as potential government interventions and conflicting regulations across jurisdictions, can impact the demand for bitcoin and restrict its usage. Additionally, risks associated with the sale of newly mined bitcoin, bitcoin trading platforms, competition from alternative digital assets, mining operations, network modifications, and intellectual property claims pose further challenges to bitcoin-linked investments.
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YieldMax(R) GME Option Income Strategy ETF | Retail Industry Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Retail Industry Risks. Sales of GME’s products involve discretionary spending by consumers, making GME’s results highly dependent on the health of the economies and consumer confidence in the markets in which GME operates. Consumers are typically more likely to make discretionary purchases, including purchasing gaming and technology products, when there are favorable economic conditions. GME’s business may be affected by many economic, social, and political factors outside GME’s control. Some of these factors include consumer disposable income levels, consumer confidence in current and future economic conditions, levels of employment, consumer credit availability, consumer debt levels, interest rates, tax rates, housing market conditions, inflation, tariffs, socio-political factors, such as civil unrest or political uncertainty, and the effect of weather, natural disasters, and public health crises. Adverse economic, social and political changes in any of the regions in which GME sells its products could adversely affect GME’s business in many ways, including reduced sales and margins.
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YieldMax(R) GME Option Income Strategy ETF | Short Selling Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Short Selling Risk. A large proportion of GME’s common stock has been and may continue to be traded by short sellers which may increase the likelihood that GME’s common stock will be the target of a “short squeeze” (i.e., where a stock’s price rapidly increases, forcing short sellers to buy back shares to cover their positions). A short squeeze has previously led and could continue to lead to volatile price movements in shares of GME’s common stock that are unrelated or disproportionate to GME’s operating performance or prospects and, once investors purchase the shares of GME’s common stock necessary to cover their short positions, the price of GME’s common stock may rapidly decline. Stockholders that purchase shares of GME’s common stock during a short squeeze may lose a significant portion of their investment.
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YieldMax(R) GME Option Income Strategy 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. | |||
YieldMax(R) GME Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) HIMS Option Income Strategy 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:
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YieldMax(R) HIMS Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) HIMS Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) HIMS Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) HIMS Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) HIMS Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) HIMS Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) HIMS Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) HIMS Option Income Strategy 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.
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YieldMax(R) HIMS Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) HIMS Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) HIMS Option Income Strategy 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.
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YieldMax(R) HIMS Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) HIMS Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) HIMS Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) HIMS Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) HIMS Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) HIMS Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) HIMS Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) HIMS Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) HIMS Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) HIMS Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) HIMS Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) HIMS Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) HIMS Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) HIMS Option Income Strategy 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.
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YieldMax(R) HIMS Option Income Strategy ETF | HIMS Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | HIMS Risk. The Fund invests in instruments that are based on the value of HIMS. This subjects the Fund to certain of the same risks as if it owned shares of HIMS, even if it does not. By virtue of the Fund’s exposure to HIMS, the Fund may also be subject to the following risks:
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YieldMax(R) HIMS Option Income Strategy ETF | Indirect Investment in HIMS Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in HIMS Risk. HIMS is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of HIMS but will be exposed to the performance of HIMS (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) HIMS Option Income Strategy ETF | HIMS Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | HIMS Trading Risk. The trading price of HIMS may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading HIMS, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence HIMS’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of HIMS, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) HIMS Option Income Strategy ETF | HIMS Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | HIMS Performance Risk. HIMS may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of HIMS to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance HIMS provides may not ultimately be accurate. If HIMS’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by HIMS could decline significantly.
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YieldMax(R) HIMS Option Income Strategy ETF | Healthcare Providers & Services Industry Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Healthcare Providers & Services Industry Risks. The healthcare providers and services industry can be significantly affected by changing economic conditions, evolving patient demographics, and fluctuations in demand for healthcare services. Profitability in this industry is often dependent on reimbursement rates from government programs and private payors, as well as the ability to manage operational costs effectively. Changes in healthcare regulations and policies, including those related to insurance coverage and reimbursement, can materially impact the industry. Companies in the healthcare providers and services industry are subject to extensive and frequently changing government regulation, which may affect the scope of their activities, the rates they can charge for services, and their compliance costs. Additionally, the industry faces risks related to litigation, operational disruptions, and evolving technologies that may alter traditional service delivery models.
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YieldMax(R) HIMS Option Income Strategy ETF | Business Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Business Risks. HIMS’s limited operating history and evolving business model make it difficult to evaluate its prospects, and fluctuations in its operational results and key performance metrics could lead to unmet investor expectations. The ability to expand offerings, attract and retain customers, and navigate evolving privacy, healthcare, and regulatory frameworks is critical; failure in these areas could materially and adversely impact HIMS’s business and financial condition. HIMS operates in highly competitive markets, facing challenges from established healthcare providers, retailers, pharmaceutical companies, and technology firms, which may affect its competitive position. Additionally, the success of HIMS is heavily reliant on its brand reputation, relationships with healthcare providers and medical groups, and compliance with complex healthcare and pharmacy regulations. Security breaches, data loss, legal proceedings, or regulatory changes could harm its operations and reputation. HIMS may require additional capital to support growth, which may not be available on favorable terms. Furthermore, its dual-class stock structure concentrates voting power with the company’s CEO, limiting investors’ influence on critical decisions.
Regulatory Investigation Risk. As of the date of this Prospectus, the U.S. Federal Trade Commission (“FTC”) is currently investigating the business practices of HIMS. Specifically, the FTC is reportedly examining whether HIMS makes it unduly difficult for customers to cancel their recurring subscriptions. In addition, the FTC is reportedly investigating the truthfulness and transparency of HIMS’ advertising, especially concerning compounded prescription drugs and their risks. At this time, it is not clear where this investigation will lead. However, it is possible that the FTC will assert improper practices by HIMS, which could negatively impact the share price of HIMS. In addition, the investigation has resulted in increased volatility for HIMS stock.
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YieldMax(R) HIMS Option Income Strategy 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. | |||
YieldMax(R) HIMS Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) LLY Option Income Strategy 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:
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YieldMax(R) LLY Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) LLY Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) LLY Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) LLY Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) LLY Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) LLY Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) LLY Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) LLY Option Income Strategy 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.
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YieldMax(R) LLY Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) LLY Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) LLY Option Income Strategy 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.
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YieldMax(R) LLY Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) LLY Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) LLY Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) LLY Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) LLY Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) LLY Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) LLY Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) LLY Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) LLY Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) LLY Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) LLY Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) LLY Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) LLY Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) LLY Option Income Strategy 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.
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YieldMax(R) LLY Option Income Strategy ETF | LLY Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | LLY Risk. The Fund invests in instruments that are based on the value of LLY. This subjects the Fund to certain of the same risks as if it owned shares of LLY, even if it does not. By virtue of the Fund’s exposure to LLY, the Fund may also be subject to the following risks:
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YieldMax(R) LLY Option Income Strategy ETF | Indirect Investment in LLY Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in LLY Risk. LLY is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of LLY but will be exposed to the performance of LLY (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) LLY Option Income Strategy ETF | LLY Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | LLY Trading Risk. The trading price of LLY may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading LLY, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence LLY’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of LLY, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) LLY Option Income Strategy ETF | LLY Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | LLY Performance Risk. LLY may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of LLY to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance LLY provides may not ultimately be accurate. If LLY’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by LLY could decline significantly.
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YieldMax(R) LLY Option Income Strategy ETF | Pharmaceutical Industry Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Pharmaceutical Industry Risks: Pharmaceutical research and development are very costly and highly uncertain; LLY may not succeed in developing, licensing, or acquiring commercially successful products sufficient in number or value to replace revenues of products that have lost or will lose intellectual property protection or are displaced by competing products or therapies. LLY and LLY’s products face intense competition from multinational pharmaceutical companies, biotechnology companies, and lower-cost generic and biosimilar manufacturers, and such competition could have a material adverse effect on LLY’s business. LLY’s business is subject to increasing government price controls and other public and private restrictions on pricing, reimbursement, and access for LLY’s drugs, which could have a material adverse effect on LLY’s results of operations, reputation or business. Pharmaceutical products can develop safety or efficacy concerns, which could have a material adverse effect on LLY’s revenues, income, and reputation.
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YieldMax(R) LLY Option Income Strategy ETF | Intellectual Property Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Intellectual Property Risks: LLY derives a significant percentage of its total revenue from relatively few products and sells products through increasingly consolidated supply chain entities, which may subject LLY to, or exacerbate, various risks. LLY depends on products with intellectual property protection for most of LLY’s revenues, cash flows, and earnings; the loss of effective intellectual property protection for certain of LLY’s products has resulted, and in the future is likely to continue to result, in rapid and severe declines in revenues for those products. LLY’s long-term success depends on intellectual property protection; if LLY’s intellectual property rights are invalidated, circumvented, or weakened, LLY’s business will be adversely affected.
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YieldMax(R) LLY Option Income Strategy ETF | Operations Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Operations Risks: Failure, inadequacy, breach of, or unauthorized access to, LLY’s IT systems or those of LLY’s third-party service providers, unauthorized access to LLY’s confidential information, or violations of data protection laws, could each result in material harm to LLY’s business and reputation. Manufacturing, quality, or supply chain difficulties, disruptions, or shortages could lead to product supply problems. Reliance on third-party relationships and outsourcing arrangements could adversely affect LLY’s business. LLY’s use of artificial intelligence or other emerging technologies could adversely impact LLY’s business and financial results.
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YieldMax(R) LLY Option Income Strategy ETF | International Business Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | International Business Risks: Uneven economic growth or downturns or international trade and other global disruptions, geopolitical tensions, or disputes could adversely affect LLY’s business and operating results. Changes in foreign currency rates, interest rate risks, and inflation affect LLY’s results of operations.
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YieldMax(R) LLY Option Income Strategy ETF | Government Regulation and Litigation Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Government Regulation and Litigation Risks: LLY faces litigation and investigations related to its products, how LLY price or commercialize its products, and other aspects of LLY’s business, which could adversely affect LLY’s business, and LLY is self-insured for such matters. LLY is subject to evolving and complex tax laws, which may result in additional liabilities and affect LLY’s results of operations. Regulatory compliance problems could be damaging to LLY.
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YieldMax(R) LLY Option Income Strategy 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. | |||
YieldMax(R) LLY Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) RDDT Option Income Strategy 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:
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YieldMax(R) RDDT Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) RDDT Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) RDDT Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) RDDT Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) RDDT Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) RDDT Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) RDDT Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) RDDT Option Income Strategy 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.
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YieldMax(R) RDDT Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) RDDT Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) RDDT Option Income Strategy 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.
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YieldMax(R) RDDT Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) RDDT Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) RDDT Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) RDDT Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) RDDT Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) RDDT Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) RDDT Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) RDDT Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) RDDT Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) RDDT Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) RDDT Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) RDDT Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) RDDT Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) RDDT Option Income Strategy 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.
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YieldMax(R) RDDT Option Income Strategy ETF | RDDT Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | RDDT Risk. The Fund invests in instruments that are based on the value of RDDT. This subjects the Fund to certain of the same risks as if it owned shares of RDDT, even if it does not. By virtue of the Fund’s exposure to RDDT, the Fund may also be subject to the following risks:
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YieldMax(R) RDDT Option Income Strategy ETF | Indirect Investment in RDDT Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in RDDT Risk. RDDT is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of RDDT but will be exposed to the performance of RDDT (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) RDDT Option Income Strategy ETF | RDDT Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | RDDT Trading Risk. The trading price of RDDT may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading RDDT, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence RDDT’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of RDDT, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) RDDT Option Income Strategy ETF | RDDT Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | RDDT Performance Risk. RDDT may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of RDDT to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance RDDT provides may not ultimately be accurate. If RDDT’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by RDDT could decline significantly.
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YieldMax(R) RDDT Option Income Strategy ETF | Advertising Industry Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Advertising Industry Risks. RDDT’s business is heavily dependent on advertising revenue, which may be influenced by macroeconomic factors, including inflation, recessionary pressures, and changes in advertiser spending patterns. Shifts in digital advertising trends, including increased competition from other platforms or changes in targeting regulations, may negatively impact revenue growth. RDDT’s ability to monetize its user base effectively depends on its capacity to balance user engagement with advertiser needs, which is a complex and evolving challenge.
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YieldMax(R) RDDT Option Income Strategy ETF | Technology Infrastructure Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Technology Infrastructure Risks. RDDT’s operations depend on maintaining a reliable and scalable technology infrastructure. Outages, system failures, or cybersecurity breaches could disrupt services, undermine user trust, and lead to financial losses. Given its reliance on third-party cloud services, RDDT is also exposed to risks related to the reliability and security of external service providers.
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YieldMax(R) RDDT Option Income Strategy ETF | Content Moderation and Compliance Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Content Moderation and Compliance Risks. RDDT operates user-generated content platforms that face scrutiny related to harmful or illegal content, misinformation, and privacy concerns. Regulatory actions or public backlash regarding its handling of these issues could result in fines, litigation, or damage to its reputation. Efforts to improve content moderation practices may increase operational costs and strain resources, potentially impacting profitability.
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YieldMax(R) RDDT Option Income Strategy ETF | International and Regulatory Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | International and Regulatory Risks. RDDT operates globally and is subject to varying laws and regulations concerning data privacy, advertising practices, and content moderation. Compliance with international regulations, such as the General Data Protection Regulation (GDPR), a data privacy law enforced by the European Union (EU), increases operational complexity and costs. Changes in international trade policies, geopolitical tensions, or unfavorable economic conditions in key markets may also negatively affect RDDT’s growth and profitability.
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YieldMax(R) RDDT Option Income Strategy 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. | |||
YieldMax(R) RDDT Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) SPOT Option Income Strategy 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:
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YieldMax(R) SPOT Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) SPOT Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) SPOT Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) SPOT Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) SPOT Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) SPOT Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) SPOT Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) SPOT Option Income Strategy 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.
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YieldMax(R) SPOT Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) SPOT Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) SPOT Option Income Strategy 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.
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YieldMax(R) SPOT Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) SPOT Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] |
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YieldMax(R) SPOT Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) SPOT Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) SPOT Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) SPOT Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) SPOT Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) SPOT Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) SPOT Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) SPOT Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) SPOT Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) SPOT Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) SPOT Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) SPOT Option Income Strategy 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.
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YieldMax(R) SPOT Option Income Strategy ETF | Foreign Investment Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Foreign Investment Risk. Because the Fund has indirect exposure to a foreign company, the Fund may be subject to risks associated with foreign investments.
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YieldMax(R) SPOT Option Income Strategy ETF | Currency Risk [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) SPOT Option Income Strategy ETF | Foreign Market and Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) SPOT Option Income Strategy ETF | Foreign Securities Risk [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) SPOT Option Income Strategy ETF | SPOT Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | SPOT Risk. The Fund invests in instruments that are based on the value of SPOT. This subjects the Fund to certain of the same risks as if it owned shares of SPOT, even if it does not. By virtue of the Fund’s exposure to SPOT, the Fund may also be subject to the following risks:
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YieldMax(R) SPOT Option Income Strategy ETF | Indirect Investment in SPOT Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in SPOT Risk. SPOT is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of SPOT but will be exposed to the performance of SPOT (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) SPOT Option Income Strategy ETF | SPOT Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | SPOT Trading Risk. The trading price of SPOT may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading SPOT, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence SPOT’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of SPOT, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) SPOT Option Income Strategy ETF | SPOT Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | SPOT Performance Risk. SPOT may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of SPOT to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance SPOT provides may not ultimately be accurate. If SPOT’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by SPOT could decline significantly.
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YieldMax(R) SPOT Option Income Strategy ETF | Entertainment Industry Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Entertainment Industry Risk. The entertainment industry is highly competitive and relies on consumer spending and the availability of disposable income for success. The prices of the securities of companies in the entertainment industries may fluctuate widely due to competitive pressures, heavy expenses incurred for research and development of products, problems related to bringing products to market, consumer preferences and rapid obsolescence of products. Changes in technology and consumer consumption patterns may also impact the demand for entertainment products, revenue generation, and production costs. Legislative or regulatory changes and increased government supervision also may affect companies in the entertainment industry.
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YieldMax(R) SPOT Option Income Strategy ETF | Streaming Service Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Streaming Service Risk. SPOT faces significant competition from other streaming services, satellite radio services and social media platforms for user attention and advertising dollars. In mature markets like North America and Europe, SPOT faces slower subscriber growth and increased churn rates. Future growth depends on expansion into emerging markets, which may have lower revenue per user and higher regulatory risks. SPOT does not own the majority of its music content. Rising content acquisition costs and exclusivity deals could impact long-term profitability. One of SPOT’s largest expenses is royalty payments to music rights holders, including record labels, artists and publishers. Any increase in royalty rates or unfavorable renegotiations could pressure margins. While SPOT has expanded its ad-supported revenue model, advertising revenue remains highly cyclical and sensitive to economic downturns. A slowdown in digital ad spending could negatively impact SPOT’s profitability. SPOT operates a cloud-based digital streaming platform that relies on third-party infrastructure providers. Server outages, cybersecurity threats or data breaches could disrupt services and impact user trust. SPOT subscriptions are discretionary spending items. Economic downturns or inflationary pressures could lead to higher subscription cancellations. Spotify operates globally, generating revenue in multiple currencies. Exchange rate fluctuations can impact reported earnings and financial performance.
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YieldMax(R) SPOT Option Income Strategy 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. | |||
YieldMax(R) SPOT Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) UBER Option Income Strategy 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:
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YieldMax(R) UBER Option Income Strategy 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 Underlying Security. The Fund may experience substantial downside from specific option positions and certain option positions held by the Fund may expire worthless. The options held by the Fund are exercisable at the strike price on their expiration date. As an option approaches its expiration date, its value typically increasingly move with the value of the underlying instrument. However, prior to such date, the value of an option generally does not increase or decrease at the same rate at the underlying instrument. There may at times be an imperfect correlation between the movement in the values of options contracts and the underlying instrument, and there may at times not be a liquid secondary market for certain options contracts. The value of the options held by the Fund will be determined based on market quotations or other recognized pricing methods. Additionally, as the Fund intends to continuously maintain indirect exposure to the Underlying Security through the use of options contracts, as the options contracts it holds are exercised or expire it will enter into new options contracts, a practice referred to as “rolling.” If the expiring options contracts do not generate proceeds enough to cover the cost of entering into new options contracts, the Fund may experience losses.
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YieldMax(R) UBER Option Income Strategy ETF | Swaps [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Swaps. The use of swap transactions is a highly specialized activity, which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. Whether the Fund will be successful in using swap agreements to achieve its investment goal depends on the ability of the Adviser to structure such swap agreements in accordance with the Fund’s investment objective and to identify counterparties for those swap agreements. If the Adviser is unable to enter into swap agreements that provide leveraged exposure to the Underlying Security, the Fund may not meet its stated investment objective. Additionally, any financing, borrowing or other costs associated with using swap transactions may also have the effect of lowering the Fund’s return.
The swap agreements in which the Fund invests are generally traded in the over-the-counter market, which generally has less transparency than exchange-traded derivatives instruments. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference assets or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities.
If the Underlying Security has a dramatic move that causes a material decline in the Fund’s net assets, the terms of a swap agreement between the Fund and its counterparty may permit the counterparty to immediately close out the swap transaction with the Fund. In that event, the Fund may be unable to enter into another swap agreement or invest in other derivatives to achieve exposure consistent with the Fund’s investment objective. This may prevent the Fund from achieving its leveraged investment objective, even if the Underlying Security later reverses all or a portion of its movement.
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YieldMax(R) UBER Option Income Strategy ETF | Counterparty Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Counterparty Risk. The Fund is subject to counterparty risk by virtue of its investments in derivative instruments. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to and receive payments from a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any options contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy, as the Fund would be limited to recovering only a pro rata share of all available funds segregated on behalf of the clearing member’s customers for the relevant account class. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. This risk is greater for the Fund as it seeks to hold options contracts on a single security, and not a broader range of options contracts, which may limit the number of clearing members that are willing to transact on the Fund’s behalf. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The Fund is also subject to the risk that the counterparty will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund and the Fund may be unable to recover its investment from such counterparty or may obtain a limited and/or delayed recovery.
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YieldMax(R) UBER Option Income Strategy ETF | Price Participation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Price Participation Risk. The Fund employs an investment strategy that includes the sale of call option contracts, which limits the degree to which the Fund will participate in increases in value experienced by the Underlying Security over the Call Period. This means that if the Underlying Security experiences an increase in value above the strike price of the sold call options during a Call Period, the Fund will likely not experience that increase to the same extent and may significantly underperform the Underlying Security over the Call Period. Additionally, because the Fund is limited in the degree to which it will participate in increases in value experienced by the Underlying Security over each Call Period, but has full exposure to any decreases in value experienced by the Underlying Security over the Call Period, the NAV of the Fund may decrease over any given time period. The Fund’s NAV is dependent on the value of each options portfolio, which is based principally upon the performance of the Underlying Security. The degree of participation in the Underlying Security gains the Fund will experience will depend on prevailing market conditions, especially market volatility, at the time the Fund enters into the sold call option contracts and will vary from Call Period to Call Period. The value of the options contracts is affected by changes in the value and dividend rates of the Underlying Security, changes in interest rates, changes in the actual or perceived volatility of the Underlying Security and the remaining time to the options’ expiration, as well as trading conditions in the options market. As the price of the Underlying Security changes and time moves towards the expiration of each Call Period, the value of the options contracts, and therefore the Fund’s NAV, will change. However, it is not expected for the Fund’s NAV to directly correlate on a day-to-day basis with the returns of the Underlying Security. The amount of time remaining until the options contract’s expiration date affects the impact of the potential options contract income on the Fund’s NAV, which may not be in full effect until the expiration date of the Fund’s options contracts. Therefore, while changes in the price of the Underlying Security will result in changes to the Fund’s NAV, the Fund generally anticipates that the rate of change in the Fund’s NAV will be different than that experienced by the Underlying Security.
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YieldMax(R) UBER Option Income Strategy ETF | Distribution Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Distribution Risk. As part of the Fund’s investment objective, the Fund seeks to provide current monthly income. There is no assurance that the Fund will make a distribution in any given month. If the Fund does make distributions, the amounts of such distributions will likely vary greatly from one distribution to the next. Additionally, monthly distributions, if any, may consist of returns of capital, which would decrease the Fund’s NAV and trading price over time. As a result, an investor may suffer significant losses to their investment.
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YieldMax(R) UBER Option Income Strategy ETF | NAV Erosion Risk Due to Distributions [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) UBER Option Income Strategy ETF | Call Strategy Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Call Strategy Risks. The path dependency (i.e., the continued use) of the Fund’s call writing strategy will impact the extent that the Fund participates in the positive price returns of the Underlying Security and, in turn, the Fund’s returns, both during the term of the sold call options and over longer time periods. If, for example, each month the Fund were to sell 7% out-of-the-money call options having a one-month term, the Fund’s participation in the positive price returns of the Underlying Security will be capped at 7% in any given month. However, over a longer period (e.g., 5 months), the Fund should not be expected to participate fully in the first 35% (i.e., 5 months x 7%) of the positive price returns of the Underlying Security, or the Fund may even lose money, even if the Underlying Security share price has appreciated by at least that much over such period, if during any month over that period the Underlying Security had a return less than 7%. This example illustrates that both the Fund’s participation in the positive price returns of the Underlying Security and its returns will depend not only on the price of the Underlying Security but also on the path that the Underlying Security takes over time.
Additionally, when implementing the Covered Call Spread Strategy, the use of credit call spreads introduces further complexities and risks. While purchasing a higher-strike call option limits potential losses from the short call position, it also reduces the net premium received, which may result in lower overall returns compared to a stand-alone covered call strategy. If the price of the Underlying Security rises rapidly, the call spread may still cap upside participation, leading to missed profit opportunities. Furthermore, market conditions, such as mispricing between near-the-money and further out-of-the-money options, may impact the effectiveness of the strategy, potentially resulting in lower-than-expected returns or increased losses. The relative pricing of options at different strike levels can vary due to volatility shifts, liquidity constraints, or other market dynamics, adding an additional layer of uncertainty to the Fund’s performance under this strategy.
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YieldMax(R) UBER Option Income Strategy 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.
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YieldMax(R) UBER Option Income Strategy ETF | Equity Market Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Equity Market Risk. The prices of equity securities rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the stock market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over a short and extended periods of time. In a declining stock market, stock prices for all companies (including those in the Fund’s portfolio) may decline, regardless of their long-term prospects.
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YieldMax(R) UBER Option Income Strategy ETF | ETF Risks [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | ETF Risks.
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YieldMax(R) UBER Option Income Strategy 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.
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YieldMax(R) UBER Option Income Strategy ETF | 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., derivative instruments). In such a case, the Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used. By paying out higher annual capital gain distributions, investors may be subjected to increased capital gains taxes. Additionally, there may be brokerage costs or taxable gains or losses that may be imposed on the Fund in connection with a cash redemption that may not have occurred if the Fund had made a redemption in-kind. These costs could decrease the value of the Fund to the extent they are not offset by a transaction fee payable by an AP.
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YieldMax(R) UBER Option Income Strategy ETF | Costs of Buying or Selling Shares [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) UBER Option Income Strategy ETF | Management Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s investment portfolio, the portfolio managers will apply investment techniques and risk analyses that may not produce the desired result. There can be no guarantee that the Fund will meet its investment objective.
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YieldMax(R) UBER Option Income Strategy ETF | Shares May Trade at Prices Other Than NAV [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) UBER Option Income Strategy ETF | Trading [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Trading. Although Shares are listed on a national securities exchange, such as NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active trading market for the Shares will develop or be maintained or that the Shares will trade with any volume, or at all, on any stock exchange. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares. Shares trade on the Exchange at market price that may be below, at or above the Fund’s NAV. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable. In addition, trading in Shares on the Exchange is subject to trading halts caused by extraordinary market volatility pursuant to the Exchange “circuit breaker” rules. There can be no assurance that the requirements of the Exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged. In the event of an unscheduled market close for options contracts that are based on the value of an ETF, such as the Underlying Security being halted or a market wide closure, settlement prices will be determined by the procedures of the listing exchange of the options contracts. As a result, the Fund could be adversely affected and be unable to implement its investment strategies in the event of an unscheduled closing.
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YieldMax(R) UBER Option Income Strategy ETF | High Portfolio Turnover Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | High Portfolio Turnover Risk. The Fund may actively and frequently trade all or a significant portion of the Fund’s holdings. A high portfolio turnover rate increases transaction costs, which may increase the Fund’s expenses. Frequent trading may also cause adverse tax consequences for investors in the Fund due to an increase in short-term capital gains.
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YieldMax(R) UBER Option Income Strategy ETF | Inflation Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Inflation Risk. Inflation risk is the risk that the value of assets or income from investments will be less in the future as inflation decreases the value of money. As inflation increases, the present value of the Fund’s assets and distributions, if any, may decline.
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YieldMax(R) UBER Option Income Strategy ETF | Liquidity Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Liquidity Risk. Some securities held by the Fund, including options contracts, may be difficult to sell or be illiquid, particularly during times of market turmoil. This risk is greater for the Fund as it will hold options contracts on a single security, and not a broader range of options contracts. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, epidemics/pandemics, new legislation or regulatory changes inside or outside the United States. Illiquid securities may be difficult to value, especially in changing or volatile markets. If the Fund is forced to sell an illiquid security at an unfavorable time or price, the Fund may be adversely impacted. Certain market conditions or restrictions, such as market rules related to short sales, may prevent the Fund from limiting losses, realizing gains or achieving a high correlation with the Underlying Security. There is no assurance that a security that is deemed liquid when purchased will continue to be liquid. Market illiquidity may cause losses for the Fund.
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YieldMax(R) UBER Option Income Strategy ETF | Money Market Instrument Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Money Market Instrument Risk. The Fund may use a variety of money market instruments for cash management purposes, including money market funds, depositary accounts and repurchase agreements. Repurchase agreements are contracts in which a seller of securities agrees to buy the securities back at a specified time and price. Repurchase agreements may be subject to market and credit risk related to the collateral securing the repurchase agreement. Money market instruments, including money market funds, may lose money through fees or other means.
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YieldMax(R) UBER Option Income Strategy 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 a track record or history on which to base their investment decisions.
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YieldMax(R) UBER Option Income Strategy 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 Adviser seek to reduce these operational risks through controls and procedures, there is no way to completely protect against such risks. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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YieldMax(R) UBER Option Income Strategy ETF | Single Issuer Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Single Issuer Risk. Issuer-specific attributes may cause an investment in the Fund to be more volatile than a traditional pooled investment which diversifies risk or the market generally. The value of the Fund, which focuses on an individual security (the Underlying Security), may be more volatile than a traditional pooled investment or the market as a whole and may perform differently from the value of a traditional pooled investment or the market as a whole.
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YieldMax(R) UBER Option Income Strategy ETF | Tax Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Tax Risk. The Fund intends to elect and to qualify each year to be treated as a RIC under Subchapter M of the Code. As a RIC, the Fund will not be subject to U.S. federal income tax on the portion of its net investment income and net capital gain that it distributes to Shareholders, provided that it satisfies certain requirements of the Code. If the Fund does not qualify as a RIC for any taxable year and certain relief provisions are not available, the Fund’s taxable income will be subject to tax at the Fund level and to a further tax at the shareholder level when such income is distributed. To comply with the asset diversification test applicable to a RIC, the Fund will attempt to ensure that the value of financial instruments providing exposure to the Underlying Security are never 25% of the total value of Fund assets at the close of any quarter. If the Fund’s investments in such financial instruments were to exceed 25% of the Fund’s total assets at the end of a tax quarter, the Fund, generally, has a grace period to cure such lack of compliance. If the Fund fails to timely cure, it may no longer be eligible to be treated as a RIC.
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YieldMax(R) UBER Option Income Strategy 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.
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YieldMax(R) UBER Option Income Strategy ETF | UBER Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | UBER Risk. The Fund invests in instruments that are based on the value of UBER. This subjects the Fund to certain of the same risks as if it owned shares of UBER, even if it does not. By virtue of the Fund’s exposure to UBER, the Fund may also be subject to the following risks:
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YieldMax(R) UBER Option Income Strategy ETF | Indirect Investment in UBER Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Indirect Investment in UBER Risk. UBER is not affiliated with the Trust, the Fund, or the Adviser, or their respective affiliates and is not involved with this offering in any way and has no obligation to consider your Shares in taking any corporate actions that might affect the value of Shares. Investors in the Fund will not have voting rights and will not be able to influence management of UBER but will be exposed to the performance of UBER (the Underlying Security). Investors in the Fund will not have the right to receive dividends or other distributions or any other rights with respect to the Underlying Security but will be subject to declines in the performance of the Underlying Security.
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YieldMax(R) UBER Option Income Strategy ETF | UBER Trading Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | UBER Trading Risk. The trading price of UBER may be subject to volatility and could experience wide fluctuations due to various factors. Short sellers may also play a significant role in trading UBER, potentially affecting the supply and demand dynamics and contributing to market price volatility. Public perception and external factors beyond the company’s control may influence UBER’s stock price disproportionately. Additionally, following periods of market volatility, companies have faced securities class action litigation. Any adverse judgment or future stockholder litigation could result in substantial costs and divert management’s attention and resources. In the event of a halt in trading of UBER, trading in shares of related funds may be impacted, either temporarily or indefinitely.
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YieldMax(R) UBER Option Income Strategy ETF | UBER Performance Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | UBER Performance Risk. UBER may fail to meet its publicly announced guidelines or other expectations about its business, which could cause the price of UBER to decline. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and the guidance UBER provides may not ultimately be accurate. If UBER’s guidance is not accurate or varies from actual results due to its inability to meet the assumptions or the impact on its financial performance that could occur as a result of various risks and uncertainties, the market value of common stock issued by UBER could decline significantly.
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YieldMax(R) UBER Option Income Strategy ETF | Driver Classification Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Driver Classification Risk. The classification of Uber’s drivers (“Drivers”) is currently being challenged in courts, by legislators and by government agencies in the United States and abroad. Uber is involved in numerous legal proceedings globally, including putative class and collective class action lawsuits, demands for arbitration, charges and claims before administrative agencies, and investigations or audits by labor, social security, and tax authorities that claim that Drivers should be treated as Uber’s employees (or as workers or quasi-employees where those statuses exist), rather than as independent contractors. Uber believes that Drivers are independent contractors because, among other things, they can choose whether, when, and where to provide services on Uber’s platform, are free to provide services on competitors’ platforms, and provide a vehicle to perform services on Uber’s platform. Nevertheless, Uber may not be successful in defending the classification of Drivers in some or all jurisdictions. Furthermore, the costs associated with defending, settling, or resolving pending and future lawsuits (including demands for arbitration) relating to the classification of Drivers have been and may continue to be material to Uber’s business.
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YieldMax(R) UBER Option Income Strategy ETF | Regulatory Risk [Member] | ||||
Prospectus [Line Items] | ||||
Risk [Text Block] | Regulatory Risk. UBER operates in a particularly complex legal and regulatory environment. UBER’s business is subject to a variety of U.S. federal, state, local and foreign laws, rules, and regulations, including those related to internet activities, privacy, cybersecurity, data protection, intellectual property, competition, consumer protection, payments, labor and employment, transportation services, transportation network companies, licensing regulations and taxation. These laws and regulations are constantly evolving and may be interpreted, applied, created, or amended, in a manner that could harm UBER’s business.
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YieldMax(R) UBER Option Income Strategy ETF | Rideshare Company Risk [Member] | ||||
Prospectus [Line Items] | ||||
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YieldMax(R) UBER Option Income Strategy 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. | |||
YieldMax(R) UBER Option Income Strategy 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 smaller number of issuers than if it was a diversified fund. As a result, a decline in the value of an investment in a single issuer or a smaller number of issuers could cause the Fund’s overall value to decline to a greater degree than if the Fund held a more diversified portfolio. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance.
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