| N-2 - USD ($) | 3 Months Ended | 12 Months Ended | |||||||||||
| Jul. 31, 2023 | Apr. 30, 2023 | Jan. 31, 2023 | Oct. 31, 2022 | Jul. 31, 2022 | Apr. 30, 2022 | Jan. 31, 2022 | Oct. 31, 2021 | Jul. 31, 2021 | Apr. 30, 2021 | Jan. 31, 2021 | Jul. 31, 2023 | ||
| Cover [Abstract] | |||||||||||||
| Entity Central Index Key | 0001501072 | ||||||||||||
| Amendment Flag | false | ||||||||||||
| Entity Inv Company Type | N-2 | ||||||||||||
| Document Type | N-CSR | ||||||||||||
| Entity Registrant Name | RIVERNORTH OPPORTUNITIES FUND, INC. | ||||||||||||
| Fee Table [Abstract] | |||||||||||||
| Shareholder Transaction Expenses [Table Text Block] | Shareholder Transaction Expenses As a Percentage of Offering Price Sales Load (1) — Expenses Borne by Common Stockholders of the Fund (1) — Dividend Reinvestment Plan Fees None (2) (1) If Common Shares are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load and the estimated offering expenses borne by the Fund. (2) There will be no brokerage charges with respect to Common Shares issued directly by the Fund under the dividend reinvestment plan. You will pay brokerage charges in connection with open market purchases or if you direct the plan agent to sell your Common Shares held in a dividend reinvestment account. | ||||||||||||
| Other Transaction Expenses [Abstract] | |||||||||||||
| Annual Expenses [Table Text Block] | Shareholder Transaction Expenses As a Percentage of Net Assets Attributable to Common Shares (1)(6) Management Fee (3) 1.73 Dividend and Interest Expense on Short Sales (4) 0.18 Interest Expense on borrowings (4) 0.00 Other Expenses (4) 0.18 Acquired Fund Fees and Expenses (5) 1.25 Total Annual Expenses 3.34 (1) If Common Shares are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load and the estimated offering expenses borne by the Fund. (3) The management fee paid by the Fund to the Adviser is essentially an all-in fee structure (the “unified management fee”), including the fee paid to the Adviser for advisory, supervisory, administrative, shareholder servicing and other services. However, the Fund (and not the Adviser) will be responsible for certain additional fees and expenses, which are reflected in the table above, that are not covered by the unified management fee. The unified management fee is charged as a percentage of the Fund’s average daily Managed Assets, as opposed to net assets. With leverage, Managed Assets are greater in amount than net assets, because Managed Assets include assets attributable to the Fund’s use of leverage created by its borrowings. In addition, the mark-to-market value of the Fund’s derivatives will be used for purposes of calculating Managed Assets. The management fee of 1.30% of the Fund’s Managed Assets represents 1.73% of net assets attributable to Common Shares assuming the use of leverage in an amount of 24% of the Fund’s Managed Assets. (4) Other Expenses, Interest Expense on Borrowings and Dividend and Interest Expense on Short Sales are estimated based on the Fund’s Annual report dated July 31, 2023. (5) The “Acquired Fund Fees and Expenses” disclosed above are based on the expense ratios for the most recent fiscal year of the Underlying Funds in which the Fund anticipates investing, which may change substantially over time and, therefore, significantly affect Acquired Fund Fees and Expenses. These amounts are based on the total expense ratio disclosed in each Underlying Fund’s most recent stockholder report. Some of the Underlying Funds in which the Fund intends to invest charge incentive fees based on the Underlying Funds’ performance. The 1.25% shown as Acquired Fund Fees and Expenses reflects estimated operating expenses of the Underlying Funds and transaction-related fees. Certain Underlying Funds in which the Fund intends to invest generally charge a management fee of 1.00% to 2.00%, which are included in “Acquired Fund Fees and Expenses,” as applicable. The Acquired Fund Fees and Expenses disclosed above, however, do not reflect any performance-based fees or allocations paid by the Underlying Funds that are calculated solely on the realization and/or distribution of gains, or on the sum of such gains and unrealized appreciation of assets distributed in-kind, as such fees and allocations for a particular period may be unrelated to the cost of investing in the Underlying Funds. Acquired Fund Fees and Expenses are borne indirectly by the Fund, but they will not be reflected in the Fund’s financial statements; and the information presented in the table will differ from that presented in the Fund’s financial highlights. (6) The example does not include sales load or estimated offering costs. The example should not be considered a representation of future expenses. The example assumes that the estimated “Other Expenses” set forth in the table are accurate and that all dividends and distributions are reinvested at net asset value and that the Fund is engaged in leverage of 24% of Managed Assets, assuming interest and fees on leverage of 6.00%. Actual expenses may be greater or less than those assumed. Moreover, the Fund’s actual rate of return may be greater or less than the hypothetical 5% annual return shown in the example. | ||||||||||||
| Other Annual Expenses [Abstract] | |||||||||||||
| Expense Example [Table Text Block] | Example (6) The purpose of the following table is to help a holder of Common Shares understand the fees and expenses that such holder would bear directly or indirectly. The following example illustrates the expenses that you would pay on a $1,000 investment in Common Shares, assuming (1) that the Fund incurs total annual expenses of 3.34% of its net assets in years 1 through 10 and (2) a 5% annual return. 1 year 3 years 5 years 10 years Total Expenses Incurred $ 34 $ 103 $ 174 $ 363 The example should not be considered a representation of future expenses. Actual expenses may be greater or less than those assumed. (6) The example does not include sales load or estimated offering costs. The example should not be considered a representation of future expenses. The example assumes that the estimated “Other Expenses” set forth in the table are accurate and that all dividends and distributions are reinvested at net asset value and that the Fund is engaged in leverage of 24% of Managed Assets, assuming interest and fees on leverage of 6.00%. Actual expenses may be greater or less than those assumed. Moreover, the Fund’s actual rate of return may be greater or less than the hypothetical 5% annual return shown in the example. | ||||||||||||
| Purpose of Fee Table , Note [Text Block] | The following table is intended to assist investors in understanding the fees and expenses (annualized) that an investor in Common Shares would bear, directly or indirectly. The table is based on the capital structure of the Fund as of July 31, 2023. | ||||||||||||
| Other Expenses, Note [Text Block] | Other Expenses, Interest Expense on Borrowings and Dividend and Interest Expense on Short Sales are estimated based on the Fund’s Annual report dated July 31, 2023. | ||||||||||||
| Management Fee not based on Net Assets, Note [Text Block] | The management fee paid by the Fund to the Adviser is essentially an all-in fee structure (the “unified management fee”), including the fee paid to the Adviser for advisory, supervisory, administrative, shareholder servicing and other services. However, the Fund (and not the Adviser) will be responsible for certain additional fees and expenses, which are reflected in the table above, that are not covered by the unified management fee. The unified management fee is charged as a percentage of the Fund’s average daily Managed Assets, as opposed to net assets. With leverage, Managed Assets are greater in amount than net assets, because Managed Assets include assets attributable to the Fund’s use of leverage created by its borrowings. In addition, the mark-to-market value of the Fund’s derivatives will be used for purposes of calculating Managed Assets. The management fee of 1.30% of the Fund’s Managed Assets represents 1.73% of net assets attributable to Common Shares assuming the use of leverage in an amount of 24% of the Fund’s Managed Assets. | ||||||||||||
| Acquired Fund Fees and Expenses, Note [Text Block] | The “Acquired Fund Fees and Expenses” disclosed above are based on the expense ratios for the most recent fiscal year of the Underlying Funds in which the Fund anticipates investing, which may change substantially over time and, therefore, significantly affect Acquired Fund Fees and Expenses. These amounts are based on the total expense ratio disclosed in each Underlying Fund’s most recent stockholder report. Some of the Underlying Funds in which the Fund intends to invest charge incentive fees based on the Underlying Funds’ performance. The 1.25% shown as Acquired Fund Fees and Expenses reflects estimated operating expenses of the Underlying Funds and transaction-related fees. Certain Underlying Funds in which the Fund intends to invest generally charge a management fee of 1.00% to 2.00%, which are included in “Acquired Fund Fees and Expenses,” as applicable. The Acquired Fund Fees and Expenses disclosed above, however, do not reflect any performance-based fees or allocations paid by the Underlying Funds that are calculated solely on the realization and/or distribution of gains, or on the sum of such gains and unrealized appreciation of assets distributed in-kind, as such fees and allocations for a particular period may be unrelated to the cost of investing in the Underlying Funds. Acquired Fund Fees and Expenses are borne indirectly by the Fund, but they will not be reflected in the Fund’s financial statements; and the information presented in the table will differ from that presented in the Fund’s financial highlights. | ||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Investment Objectives and Practices [Text Block] | Investment Objective There have been no changes in the Fund’s investment objective since the prior disclosure date that has not been approved by shareholders. The Fund’s investment objective is total return consisting of capital appreciation and current income. Principal Investment Strategies There have been no material changes to the Fund’s principal investment strategies since the prior disclosure date, other than updates related to RiverNorth Capital Management, LLC (“RiverNorth” or the “Adviser”) serving as investment adviser to the Fund effective as of October 1, 2022. The Fund seeks to achieve its investment objective by pursuing a tactical asset allocation strategy and opportunistically investing under normal circumstances in closed-end funds, exchange-traded funds (“ETFs”), business development companies (“BDCs” and collectively, “Underlying Funds”) and special purpose acquisition companies (“SPACs”). BDCs are a type of closed-end fund that invests in small companies in the initial stages of their development and are similar to venture capital funds. SPACs are collective investment structures that pool funds in order to seek potential acquisition opportunities. The Adviser has the flexibility to change the Fund’s asset allocation based on its ongoing analysis of the equity, fixed income and alternative asset markets. The Adviser considers various quantitative and qualitative factors relating to the domestic and foreign securities markets and economies when making asset allocation and security selection decisions. While the Adviser continuously evaluates these factors, material shifts in the Fund’s asset class exposures will typically take place over longer periods of time. In addition, the Fund, in seeking to achieve its investment objective, will not take activist positions in the Underlying Funds or SPACs. Under normal market conditions, the Fund will invest at least 80% of its Managed Assets in Underlying Funds and SPACs. The Fund directly, and therefore Common Stockholders indirectly, will bear the expenses of the Underlying Funds or SPACs. Under normal market conditions: (i) no more than 80% of the Fund’s Managed Assets will be invested in “equity” Underlying Funds and SPACs; (ii) no more than 60% of the Fund’s Managed Assets will be invested in “fixed income” Underlying Funds and SPACs; (iii) no more than 30% of the Fund’s Managed Assets will be invested in “global equity” Underlying Funds and SPACs; (iv) no more than 15% of the Fund’s Managed Assets will be invested in “emerging market equity” Underlying Funds; (v) no more than 30% of the Fund’s Managed Assets will be invested in “high yield” (also known as “junk bond”) and “senior loan” Underlying Funds and SPACs; (vi) no more than 15% of the Fund’s Managed Assets will be invested in “emerging market income” Underlying Funds and SPACs; (vii) no more than 10% of the Fund’s Managed Assets will be invested in “real estate” Underlying Funds and SPACs; and (viii) no more than 15% of the Fund’s Managed Assets will be invested in “energy master limited partnership” (“MLP”) Underlying Funds and SPACs. Underlying Funds and SPACs included in the 30% limitation applicable to investments in “global equity” Underlying Funds and SPACs may include Underlying Funds and SPACs that invest a portion of their assets in emerging markets securities. The Fund will also limit its investments in closed-end funds (including BDCs) that have been in operation for less than one year to no more than 10% of the Fund’s Managed Assets. The Fund will not invest in inverse ETFs and leveraged ETFs. The types of Underlying Funds and SPACs referenced in this paragraph will be categorized in accordance with the fund categories established and maintained by Morningstar, Inc. The investment parameters stated above (and elsewhere in this report) apply only at the time of purchase. The Underlying Funds and SPACs in which the Fund invests will not include those that are advised or subadvised by the Adviser or its affiliates. In selecting closed-end funds, the Adviser opportunistically utilizes a combination of short-term and longer-term trading strategies to seek to derive value from the discount and premium spreads associated with closed-end funds. The Fund benefits if it purchases a closed-end fund at a discount and the discount narrows. In addition, the Fund may purchase closed-end funds at a premium if the Adviser believes the premium will increase. The Adviser employs both a quantitative and qualitative approach in its selection of closed-end funds and has developed proprietary screening models and trading algorithms to trade closed-end funds. The Adviser employs the following trading strategies, among others: Statistical Analysis (Mean Reversion) ● Using proprietary quantitative models, the Adviser seeks to identify closed-end funds that are trading at compelling absolute and / or relative discounts. ● The Fund will attempt to capitalize on the perceived mispricing if the Adviser believes that the discount widening is irrational and expects the discount to narrow to longer-term mean valuations. Corporate Actions ● The Adviser will pursue investments in closed-end funds that have announced, or the Adviser believes are likely to announce, certain corporate actions that may drive value for their shareholders. ● The Adviser has developed trading strategies that focus on closed-end fund tender offers, rights offerings, shareholder distributions, open-endings and liquidations. The Fund will invest in other Underlying Funds and SPACs (that are not closed-end funds) to gain exposure to specific asset classes when the Adviser believes closed-end fund discount or premium spreads are not attractive or to manage overall closed-end fund exposure in the Fund. An index-based ETF is an investment company that seeks to track the performance of a particular market index. These indices include not only broad-market indices, but more specific indices as well, including those relating to particular sectors, markets, regions and industries. The Adviser selects ETFs based on their ability to offer specific sector and style exposure in a cost and tax efficient manner. The Fund purchases ETF shares on the secondary market. Unlike a fund that allocates its assets among mutual funds based on the perceived ability of the advisers to those mutual funds, the Adviser actively manages the Fund’s portfolio among the Underlying Funds and SPACs based on the Adviser’s research and analysis of the market and the investment merit of the Underlying Funds and SPACs themselves. In evaluating the investment merit of Underlying Funds and SPACs, the Adviser analyzes the asset class, the portfolio manager(s) and the adviser, past performance, recent portfolio holdings and concentration risks. Under normal circumstances, the Fund intends to maintain long positions in Underlying Funds and SPACs, however, may engage in short sales for investment purposes. When the Fund engages in a short sale, it sells a security it does not own and, to complete the sale, borrows the same security from a broker or other institution. The Fund may benefit from a short position when the shorted security decreases in value. The Fund may also at times establish hedging positions. Hedging positions may include short sales and derivatives, such as options and swaps (“Hedging Positions”). Under normal market conditions, no more than 30% of the Fund’s Managed Assets will be in Hedging Positions. The Fund’s investments in derivatives will be included under the 80% policy noted above so long as the underlying asset of such derivatives is a closed-end fund or Underlying Fund, respectively. The Adviser intends to use Hedging Positions to lower the Fund’s volatility but they may also be used to seek to enhance the Fund’s return. A short sale is a transaction in which the Fund sells a security that it does not own in anticipation of a decline in the market price of the security. To complete the short sale, the Fund must arrange through a broker to borrow the security in order to deliver it to the buyer. The Fund is obligated to replace the borrowed security by purchasing it at a market price at or prior to the time it must be returned to the lender. The price at which the Fund is required to replace the borrowed security may be more or less than the price at which the security was sold by the Fund. The Fund will incur a loss if the price of the security sold short increases between the date of the short sale and the date on which the Fund replaces the borrowed security. The Fund will realize a gain if the price of the security declines between those dates. The Adviser performs both a quantitative and qualitative analysis, including fundamental and technical analysis to assess the relative risk and reward potential for each SPAC investment. Among other things, the Adviser will evaluate the management team’s strategy, experience, deal flow, and demonstrated track record in building enterprise value. The Adviser will also evaluate the terms of each SPAC offering, including the aggregate amount of the offering, the offering price of the securities, the equity yield to termination, the option value of warrants, the sponsor’s interest in the SPAC, and the expected liquidity of the SPAC’s securities. The Fund will purchase securities of SPACs in their initial public offerings and in the secondary market. In selecting SPAC investments, the Adviser will also utilize trading strategies and programs to seek to derive value from buying and selling SPAC securities, including units, common shares and warrants. Under normal market conditions, the Fund intends to purchase SPAC securities in an initial public offering and opportunistically buy and sell SPAC securities on the secondary market prior to a SPAC’s initial business combination. The Fund does not intend to hold common shares after a SPAC’s initial business combination has been completed other than common shares obtained temporarily through the conversion of a SPAC’s warrants into common shares. The Fund may redeem common shares of a SPAC in exchange for the Fund’s pro rata portion of the SPAC’s trust account. The Fund also may invest up to 20% of its Managed Assets in exchange-traded notes (“ETNs”), certain derivatives, such as options and swaps, cash and cash equivalents. Such investments will not be counted towards the Fund’s 80% policy. ETNs are debt securities whose returns are linked to a particular index. The Fund may invest directly in debt securities issued by certain credit-oriented unlisted funds and BDCs (“Private Debt”) identified by the Adviser in its due diligence process. The Adviser believes that investments in Private Debt can provide the Fund with the opportunity to obtain more favorable terms and similar risk profiles to similar publicly traded debt investments available. Private Debt often may be illiquid and is typically not listed on an exchange and traded less actively than similar securities issued by publicly traded-vehicles. For certain Private Debt investments, trading may only be possible through the assistance of the broker who originally brought the security to the market and has a relationship with the issuer. Due to the limited trading market, independent pricing services may be unable to provide a price for Private Debt, and the fair value of the securities may be determined in good faith under procedures approved by the Board, which typically will include the use of one or more independent broker quotes. In selecting appropriate Private Debt investments for the Fund, the Adviser completes a fundamental and technical analysis of the issuer, with a focus on reducing downside risk. As part of this analysis, the Adviser evaluates the manager’s experience and ability based on historical track record regarding credit performance of previously originated loans and meetings with the management team. In addition, the Adviser reviews the issuer’s investment portfolio, including the issuer’s asset diversification across type and sector, before further evaluating the issuer’s financials to review its capital structure, particularly details of any existing leverage and the maximum leverage permitted on any senior debt of the issuer. Once comfort is reached regarding the issuer’s investment portfolio, manager, and capital structure, the Adviser then evaluates details of the terms of the Private Debt opportunity, beginning with a review to ensure appropriate covenants are contained within to limit the Fund’s downside risk across a range of scenarios (which typically will include a minimum level of subordination requirement.) Following, the Adviser will review and weigh pricing levels on the Private Debt compared to other opportunities in the market to assess relative value and arrive at an investment decision. Opportunities for the Fund to make investments in Private Debt may be limited, especially those which fit the Adviser’s investment criteria. The Fund may attempt to enhance the return on the cash portion of its portfolio by investing in a total return swap agreement. A total return swap agreement provides the Fund with a return based on the performance of an underlying asset, in exchange for fee payments to a counterparty based on a specific rate. The difference in the value of these income streams is recorded daily by the Fund, and is typically settled in cash at least monthly. If the underlying asset declines in value over the term of the swap, the Fund would be required to pay the dollar value of that decline plus any applicable fees to the counterparty. The Fund may use its own net asset value (“NAV”) or any other reference asset that the Adviser chooses as the underlying asset in a total return swap. The Fund will limit the notional amount of all total return swaps in the aggregate to 15% of the Fund’s Managed Assets. Using the Fund’s own NAV as the underlying asset in the total return swap serves to reduce cash drag (the impact of cash on the Fund’s overall return) by replacing it with the impact of market exposure based upon the Fund’s own investment holdings. This type of total return swap would provide the Fund with a return based on its NAV. Like any total return swap, the Fund would be subject to counterparty risk and the risk that its own NAV declines in value. The Fund generally seeks to hold securities for the long term, but may liquidate positions in order to change the Fund’s asset allocation or to generate cash to invest in more attractive opportunities, which may result in a larger portion of any net gains being realized as short-term capital gains. In addition, a negative change in the fundamental or qualitative characteristics of the issuer may cause the Adviser to sell a security. Finally, the Adviser may sell a security when its price approaches, meets or exceeds the Adviser’s target price. For instance, the Adviser may sell shares of a closed-end fund when it is no longer selling at a discount. This may result in a high rate of portfolio turnover. The Fund’s investment objective is non-fundamental and may be changed by the Board without Common Stockholder approval. Common Stockholders will, however, receive at least 60 days’ prior notice of any change in this investment objective. | ||||||||||||
| Risk Factors [Table Text Block] | Risks Investing in the Fund involves certain risks relating to its structure and investment objective. You should carefully consider these risk factors, together with all of the other information included in this report, before deciding whether to make an investment in the Fund. An investment in the Fund may not be appropriate for all investors, and an investment in the common shares of the Fund should not be considered a complete investment program. The risks set forth below are not the only risks of the Fund, and the Fund may face other risks that have not yet been identified, which are not currently deemed material or which are not yet predictable. If any of the following risks occur, the Fund’s financial condition and results of operations could be materially adversely affected. In such case, the Fund’s NAV and the trading price of its securities could decline, and you may lose all or part of your investment. Certain risk factors included below have been updated since the prior disclosure date to reflect certain non-material updates. Structural Risks: Not a Complete Investment Program The Fund is intended for investors seeking capital appreciation and current income over the long-term, and is not intended to be a short-term trading vehicle. An investment in the Common Shares of the Fund should not be considered a complete investment program. Each investor should take into account the Fund’s investment objective and other characteristics as well as the investor’s other investments when considering an investment in the Common Shares. An investment in the Fund may not be appropriate for all investors. Risks Associated with Offerings of Additional Common Shares The voting power of current Common Stockholders will be diluted to the extent that current Common Stockholders do not purchase Common Shares in any future offerings of Common Shares or do not purchase sufficient Common Shares to maintain their percentage interest. If the Fund is unable to invest the proceeds of such offering as intended, the Fund’s per Common Share distribution may decrease and the Fund may not participate in market advances to the same extent as if such proceeds were fully invested as planned. If the Fund sells Common Shares at a price below NAV pursuant to the consent of Common Stockholders, shareholders will experience a dilution of the aggregate NAV per Common Share because the sale price will be less than the Fund’s then-current NAV per Common Share. Similarly, were the expenses of the offering to exceed the amount by which the sale price exceeded the Fund’s then current NAV per Common Share, shareholders would experience a dilution of the aggregate NAV per Common Share. This dilution will be experienced by all shareholders, irrespective of whether they purchase Common Shares in any such offering. Additional Risks of Rights There are additional risks associated with an offering of subscription rights to purchase Common Shares (“Rights”). Shareholders who do not exercise their Rights may, at the completion of such an offering, own a smaller proportional interest in the Fund than if they exercised their Rights. As a result of such an offering, a shareholder may experience dilution in NAV per share if the subscription price per share is below the NAV per share on the expiration date. If the subscription price per share is below the NAV per share of the Fund’s Common Shares on the expiration date, a shareholder will experience an immediate dilution of the aggregate NAV of such shareholder’s Common Shares if the shareholder does not participate in such an offering and the shareholder will experience a reduction in the NAV per share of such shareholder’s Common Shares whether or not the shareholder participates in such an offering. Such a reduction in NAV per share may have the effect of reducing market price of the Common Share. The Fund cannot state precisely the extent of this dilution (if any) if the shareholder does not exercise such shareholder’s Rights because the Fund does not know what the NAV per share will be when the offer expires or what proportion of the Rights will be exercised. If the subscription price is substantially less than the then current NAV per Common Share at the expiration of a rights offering, such dilution could be substantial. Any such dilution or accretion will depend upon whether (i) such shareholders participate in the rights offering and (ii) the Fund’s NAV per Common Share is above or below the subscription price on the expiration date of the rights offering. In addition to the economic dilution described above, if a Common Stockholder does not exercise all of their rights, the Common Stockholders will incur voting dilution as a result of this rights offering. This voting dilution will occur because the Common Stockholders will own a smaller proportionate interest in the Fund after the rights offering than prior to the rights offering. There is a risk that changes in market conditions may result in the underlying Common Shares purchasable upon exercise of the subscription rights being less attractive to investors at the conclusion of the subscription period. This may reduce or eliminate the value of the subscription rights. If investors exercise only a portion of the rights, the number of Common Shares issued may be reduced, and the Common Shares may trade at less favorable prices than larger offerings for similar securities. Subscription rights issued by the Fund may be transferable or non-transferable rights. In a non-transferable rights offering, Common Stockholders who do not wish to exercise their rights will be unable to sell their rights. In a transferrable rights offering, the Fund will use its best efforts to ensure an adequate trading market for the rights; however, investors may find that there is no market to sell rights they do not wish to exercise. Leverage Risks The Fund may borrow money, or issue debt or preferred stock. Since the holders of Common Shares pay all expenses related to the issuance of debt or use of leverage, the use of leverage through borrowing of money, issuance of debt securities or the issuance of preferred stock for investment purposes creates risks for the holders of Common Shares. Leverage is a speculative technique that exposes the Fund to greater risk and increased costs than if it were not implemented. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage. As a result, leverage may cause greater changes in the Fund’s NAV. The Fund will also have to pay interest on its borrowings or dividends on preferred stock, if any, which may reduce the Fund’s return. The leverage costs may be greater than the Fund’s return on the underlying investment. The Fund’s leveraging strategy may not be successful. If the Fund utilizes leverage in the form of borrowing, it anticipates that the money borrowed for investment purposes will incur interest based on shorter-term interest rates that would be periodically reset. So long as the Fund’s portfolio provides a higher rate of return, net of expenses, than the interest rate on borrowed money, as reset periodically, the leverage may cause the holders of Common Shares to receive a higher current rate of return than if the Fund were not leveraged. If, however, long-term and/or short-term rates rise, the interest rate on borrowed money could exceed the rate of return on securities held by the Fund, reducing return to the holders of Common Shares. There is no assurance that a leveraging strategy will be successful. Leverage involves risks and special considerations for Common Stockholders, including: • the likelihood of greater volatility of NAV, market price and dividend rate of the Common Shares than a comparable portfolio without leverage; • the risk that fluctuations in interest rates on borrowings or on short-term debt or in the interest or dividend rates on any debt securities or preferred shares that the Fund must pay will reduce the return to the Common Stockholders; • the effect of leverage in a declining market, which is likely to cause a greater decline in the NAV of the Common Shares than if the Fund were not leveraged, may result in a greater decline in the market price of the Common Shares; • when the Fund uses financial leverage, the investment management fees payable to the Adviser will be higher than if the Fund did not use leverage. This may create a conflict of interest between the Adviser, on the one hand, and the holders of Common Shares, on the other; and • leverage may increase operating costs, which may reduce total return. The use of leverage may require the Fund to segregate assets to cover its obligations (or, if the Fund borrows money or issues preferred shares, to maintain asset coverage in conformity with the requirements of the 1940 Act). While the segregated assets will be invested in liquid securities, they may not be used for other operational purposes. Consequently, the use of leverage may limit the Fund’s flexibility and may require that the Fund sell other portfolio investments to pay Fund expenses, to maintain assets in an amount sufficient to cover the Fund’s leveraged exposure or to meet other obligations at a time when it may be disadvantageous to sell such assets. Certain types of borrowings by the Fund may result in the Fund being subject to covenants in credit agreements relating to asset coverage and portfolio composition requirements. The Fund may be subject to certain restrictions on investments imposed by guidelines of one or more rating agencies, which may issue ratings for the short-term debt securities or preferred shares issued by the Fund. These guidelines may impose asset coverage or portfolio composition requirements that are more stringent than those imposed by the 1940 Act. The Adviser does not believe that these covenants or guidelines will impede it from managing the Fund’s portfolio in accordance with the Fund’s investment objective and policies if the Fund were to utilize leverage. Leverage risk would also apply to the Fund’s investments in Underlying Funds and SPACs to the extent an Underlying Fund or SPAC uses leverage. Market Discount The stock of closed-end management investment companies often trade at a discount from their NAV, and the Fund’s Common Shares may likewise trade at a discount from NAV. The trading price of the Fund’s Common Shares may be less than the NAV. The returns earned by Common Stockholders who sell their Common Shares below NAV will be reduced. The Fund’s Common Shares are currently sold at a premium to NAV. This risk would also apply to the Fund’s investments in closed-end funds. Anti-Takeover Provisions Maryland law and the Fund’s Charter and Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Fund or to convert the Fund to open-end status. These provisions could deprive the holders of Common Shares of opportunities to sell their Common Shares at a premium over the then current market price of the Common Shares or at NAV. This risk would also apply to many of the Fund’s investments in closed-end funds. Investment-Related Risks: The risks listed below are in alphabetical order. With the exception of Underlying Fund risk (and except as otherwise noted below), the following risks apply to the direct investments the Fund may make, and generally apply to the Fund’s investments in Underlying Funds and SPACs. That said, each risk described below may not apply to each Underlying Fund or SPAC investment. Similarly, an Underlying Fund may be subject to additional or different risks than those described below. Asset Allocation Risks To the extent that the Adviser’s asset allocation strategy may fail to produce the intended result, the Fund’s return may suffer. Additionally, the active asset allocation style of the Fund leads to changing allocations over time and represents a risk to investors who target fixed asset allocations. Convertible Securities Risks The market value of convertible securities tends to fall when prevailing interest rates rise. The value of convertible securities also tends to change whenever the market value of the underlying common or preferred stock fluctuates. Convertible securities tend to be of lower credit quality. Defensive Measures The Fund may invest up to 100% of its assets in cash, cash equivalents and short-term investments as a defensive measure in response to adverse market conditions or opportunistically at the discretion of the Adviser. During these periods or during periods when an Underlying Fund invests defensively, the Fund may not be pursuing its investment objective. Derivatives Risks The Fund and the Underlying Funds may enter into derivatives transactions. Derivative transactions involve investment techniques and risks different from those associated with investments in Underlying Funds. Generally, a derivative is a financial contract the value of which depends upon, or is derived from, the value of an underlying asset, reference rate, or index, and may relate to individual debt or equity instruments, interest rates, currencies or currency exchange rates, commodities, related indexes, and other assets. Derivatives can be volatile and involve various types and degrees of risk, depending upon the characteristics of a particular derivative. Derivatives may entail investment exposures that are greater than their cost would suggest, meaning that a small investment in a derivative could have a large potential impact on the performance of a fund. A fund could experience a loss if derivatives do not perform as anticipated, if they are not correlated with the performance of other investments which they are used to hedge or if the fund is unable to liquidate a position because of an illiquid secondary market. The market for many derivatives is, or can suddenly become, illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices of derivatives. When used for speculative purposes, derivatives will produce enhanced investment exposure, which will magnify gains and losses. Certain derivatives transactions may give rise to a form of leverage. The use of leverage may cause a fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations. Leverage may cause a fund to be more volatile than if it had not been leveraged. This is because leverage tends to exaggerate the effect of any increase or decrease in the value of the fund’s portfolio securities. Further, using derivatives may include the risk of mispricing or improper valuation of derivatives and the inability of derivatives to correlate perfectly, or at all, with the value of the assets, reference rates or indexes they are designed to closely track. The Fund also will be subject to credit risk with respect to the counterparties to the derivatives contracts purchased by the Fund. If a counterparty becomes bankrupt or otherwise fails to perform its obligations under a derivative contract due to financial difficulties, the Fund may experience significant delays in obtaining any recovery under the derivative contract in a bankruptcy or other reorganization proceeding. The Fund may obtain only a limited recovery or may obtain no recovery in such circumstances. On October 28, 2020, the Securities and Exchange Commission (“SEC”) adopted Rule 18f-4 under the 1940 Act relating to a registered investment company’s use of derivatives and related instruments. Rule 18f-4 prescribes specific value-at-risk leverage limits for certain derivatives users and requires certain derivatives users to adopt and implement a derivatives risk management program (including the appointment of a derivatives risk manager and the implementation of certain testing requirements), and prescribes reporting requirements in respect of derivatives. Subject to certain conditions, if a fund qualifies as a “limited derivatives user,” as defined in Rule 18f-4, it is not subject to the full requirements of Rule 18f-4. In connection with the adoption of Rule 18f-4, the SEC rescinded certain of its prior guidance regarding asset segregation and coverage requirements in respect of derivatives transactions and related instruments. With respect to reverse repurchase agreements or other similar financing transactions in particular, Rule 18f-4 permits a fund to enter into such transactions if the fund either (i) complies with the asset coverage requirements of Section 18 of the 1940 Act, and combines the aggregate amount of indebtedness associated with all similar financing with the aggregate amount of any other senior securities representing indebtedness when calculating the relevant asset coverage ratio, or (ii) treats all similar financing transactions as derivatives transactions for all purposes under Rule 18f-4. The Fund was required to comply with Rule 18f-4 beginning August 19, 2022 and has adopted procedures for investing in derivatives and other transactions in compliance with Rule 18f-4. Disclosure regarding Rule 18f-4 under the 1940 Act has been added since the prior disclosure date. Defaulted and Distressed Securities Risks The Underlying Funds may invest directly in defaulted and distressed securities. Legal difficulties and negotiations with creditors and other claimants are common when dealing with defaulted or distressed companies. Defaulted or distressed companies may be insolvent or in bankruptcy. In the event of a default, an Underlying Fund may incur additional expenses to seek recovery. The repayment of defaulted bonds is subject to significant uncertainties, and in some cases, there may be no recovery of repayment. Defaulted bonds might be repaid only after lengthy workout or bankruptcy proceedings, during which the issuer might not make any interest or other payments. Because of the relative illiquidity of defaulted or distressed debt and equity securities, short sales are difficult, and most Underlying Funds primarily maintain long positions. Some relative value trades are possible, where an investor sells short one class of a defaulted or distressed company’s capital structure and purchases another. With distressed investing, often there is a time lag between when an Underlying Fund makes an investment and when the Underlying Fund realizes the value of the investment. In addition, an Underlying Fund may incur legal and other monitoring costs in protecting the value of the Underlying Fund’s claims. Equity Securities Risks While equity securities have historically generated higher average returns than fixed income securities, equity securities have also experienced significantly more volatility in those returns. An adverse event, such as an unfavorable earnings report, may depress the value of an issuer’s equity securities held by an Underlying Fund. Equity security prices fluctuate for several reasons, including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant stock market, or when political or economic events affecting the issuers occur. The value of a particular equity security may fall in value. The prices of stocks change in response to many factors, including the historical and prospective earnings of the issuer, the value of its assets, management decisions, decreased demand for an issuer’s products or services, increased production costs, general economic conditions, interest rates, currency exchange rates, investor perceptions and market liquidity. The value of an Underlying Fund’s shares will go up and down due to movement in the collective returns of the individual securities held by the Underlying Fund. Common stocks are subordinate to preferred stocks and debt in a company’s capital structure, and if a company is liquidated, the claims of secured and unsecured creditors and owners of preferred stocks take precedence over the claims of those who own Common Shares. In addition, equity security prices may be particularly sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase. Exchange-Traded Note Risks The Fund and the Underlying Funds may invest in exchange-traded notes (“ETNs”), which are notes representing unsecured debt issued by an underwriting bank. ETNs are typically linked to the performance of an index plus a specified rate of interest that could be earned on cash collateral. The value of an ETN may be influenced by time to maturity, level of supply and demand for the ETN, volatility and lack of liquidity in underlying markets, changes in the applicable interest rates, changes in the issuer’s credit rating and economic, legal, political or geographic events that affect the referenced index. ETNs typically mature 30 years from the date of issue. The issuer’s credit rating will be investment grade at the time of investment, however, the credit rating may be revised or withdrawn at any time and there is no assurance that a credit rating will remain in effect for any given time period. If a rating agency lowers the issuer’s credit rating, the value of the ETN will decline and a lower credit rating reflects a greater risk that the issuer will default on its obligation. When a fund invests in ETNs, it will bear its proportionate share of any fees and expenses associated with investment in such securities. Such fees reduce the amount of return on investment at maturity or upon redemption. There may be restrictions on a fund’s right to liquidate its investment in an ETN prior to maturity (for example, a fund may only be able to offer its ETN for repurchase by the issuer on a weekly basis), since ETNs are meant to be held until maturity. A fund’s decision to sell its ETN holdings may be limited by the availability of a secondary market. Fixed Income Securities Risks The Underlying Funds and the Fund may invest in fixed income securities. Fixed income securities increase or decrease in value based on changes in interest rates. If rates increase, the value of an Underlying Fund’s fixed income securities generally declines. On the other hand, if rates fall, the value of the fixed income securities generally increases. The issuer of a fixed income security may not be able to make interest and principal payments when due. This risk is increased in the case of issuers of high yield securities, also known as “junk bonds.” If a U.S. Government agency or instrumentality in which an Underlying Fund invests defaults, and the U.S. Government does not stand behind the obligation, the Underlying Fund’s share price or yield could fall. Securities of certain U.S. Government sponsored entities are neither issued nor guaranteed by the U.S. Government. The Underlying Funds may invest in fixed income securities of any credit quality, maturity or duration. Fixed income securities risks include components of the following additional risks: Credit Risk. High Yield Securities Risk. U.S. Government Securities Risk. Interest Rate Risk. Interest rates in the United States and many other countries have risen in recent periods and may continue to rise in the future. Additionally, as a result of increasing interest rates, reserves held by banks and other financial institutions in bonds and other debt securities could face a significant decline in value relative to deposits and liabilities, which coupled with general economic headwinds resulting from a changing interest rate environment, creates liquidity pressures at such institutions, as evidenced by the bank run on the Silicon Valley Bank Financial Group (“SVB”) causing it to be placed into receivership. As a result, certain sectors of the credit markets could experience significant declines in liquidity, and it is possible that the Fund (or an Underlying Fund) will not be able to manage this risk effectively. It is yet to be determined how the bank run on SVB will fully impact the overall performance of the Fund or an Underlying Fund and how similar events may affect the ability of the Fund or an Underlying Fund to execute its investment strategy. Sovereign Obligation Risk. Foreign Investing Risks The Fund and the Underlying Funds may invest in foreign securities. Investments in foreign securities may be affected by currency controls and exchange rates; different accounting, auditing, financial reporting, and legal standards and practices; expropriation; changes in tax policy; social, political and economic instability; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. In addition, changes in government administrations or economic or monetary policies in the United States or abroad could result in appreciation or depreciation of the Fund’s or Underlying Fund’s securities. These risks may be heightened in connection with investments in emerging or developing countries. To the extent that a Fund or Underlying Fund invests in depositary receipts, the Fund or Underlying Fund will be subject to many of the same risks as when investing directly in foreign securities. The effect of recent, worldwide economic instability on specific foreign markets or issuers may be difficult to predict or evaluate, and some national economies continue to show profound instability, which may in turn affect their international trading partners. Illiquid Securities Risks The Underlying Funds may invest in illiquid securities. It may not be possible to sell or otherwise dispose of illiquid securities both at the price and within the time period deemed desirable by a fund. Illiquid securities also may be difficult to value. Initial Public Offerings Risks The Fund and the Underlying Funds may purchase securities in initial public offerings (“IPOs”). Because securities sold in an IPO frequently are volatile in price, the Fund or an Underlying Fund may hold IPO shares for a very short period of time. This may increase the turnover of a fund’s portfolio and may lead to increased expenses to the fund, such as commissions and transaction costs. By selling shares, a fund may realize taxable capital gains that it will subsequently distribute to shareholders. Investing in IPOs has added risks because the shares are frequently volatile in price. As a result, their performance can be more volatile and they face greater risk of business failure, which could increase the volatility of a fund’s portfolio. The Fund’s IPO investments may be in IPOs of Underlying Funds. There is a significant risk that the shares of closed-end funds purchased in an IPO will trade at a price below their IPO price. Investment and Market Risks An investment in Common Shares is subject to investment risk, including the possible loss of the entire principal amount invested. An investment in Common Shares represents an indirect investment in the Underlying Funds owned by the Fund. The value of the Underlying Funds, like other market investments, may move up or down, sometimes rapidly and unpredictably. Overall stock market risks may also affect the NAV of the Fund or the Underlying Funds. Factors such as domestic and foreign economic growth and market conditions, interest rate levels and political events affect the securities markets. The Common Shares at any point in time may be worth less than the original investment, even after taking into account any reinvestment of dividends and distributions. Legislation, Policy and Regulatory Risks At any time after the date of this annual report, legislation or additional regulations may be enacted that could negatively affect the assets of the Fund or the issuers of such assets. Recent changes in the U.S. political landscape and changing approaches to regulation may have a negative impact on the entities and/or securities in which the Fund or an Underlying Fund invests. Legislation or regulation may also change the way in which the Fund or an Underlying Fund is regulated. New or amended regulations may be imposed by the Commodity Futures Trading Commission (“CFTC”), the SEC, the Board of Governors of the Federal Reserve System or other financial regulators, other governmental regulatory authorities or self-regulatory organizations that supervise the financial markets that could adversely affect the Fund or the Underlying Funds. In particular, these agencies are empowered to promulgate a variety of new rules pursuant to financial reform legislation in the United States. There can be no assurance that future legislation, regulation or deregulation will not have a material adverse effect on the Fund or will not impair the ability of the Fund to achieve its investment objective. The Fund and the Underlying Funds also may be adversely affected by changes in the enforcement or interpretation of existing statutes and rules by these governmental regulatory authorities or self regulatory organizations. LIBOR Risk Certain of the Fund's or Underlying Funds’ investments, payment obligations and financing terms may be based on floating rates, such as LIBOR, Euro Interbank Offered Rate and other similar types of reference rates. In July of 2017, the head of the United Kingdom Financial Conduct Authority (“FCA”) announced a desire to phase out the use of LIBOR at the end of 2021. Most LIBOR settings are no longer published as of December 31, 2021. Overnight and 12-month U.S. dollar LIBOR settings permanently ceased after publication on June 30, 2021. 1-, 3-and 6-month U.S. dollar LIBOR settings will continue to be published using a synthetic methodology until September 2024. Neither the effect of the LIBOR transition process nor its ultimate success can yet be known. Although the transition away from LIBOR has become increasingly well-defined, any potential effects of the transition away from LIBOR and other benchmark rates on financial markets, a fund or the financial instruments in which a fund invests can be difficult to ascertain. Not all existing LIBOR-based instruments may have alternative rate-setting provisions and there remains uncertainty regarding the willingness and ability of issuers to add alternative rate-setting provisions in certain existing instruments. Global regulators have advised market participants to cease entering into new contracts using LIBOR as a reference rate, and it is possible that investments in LIBOR-based instruments could invite regulatory scrutiny. In addition, a liquid market for newly-issued instruments that use a reference rate other than LIBOR still may be developing. All of the aforementioned may adversely affect the Fund’s or an Underlying Fund’s performance or NAV. Management Risks The Adviser’s judgments about the attractiveness, value and potential appreciation of a particular asset class or individual security in which the Fund invests may prove to be incorrect and there is no guarantee that the Adviser’s judgment will produce the desired results. Similarly, the Fund’s investments in Underlying Funds are subject to the judgment of the Underlying Funds’ managers which may prove to be incorrect. In addition, the Adviser will have limited information as to the portfolio holdings of the Underlying Funds at any given time. This may result in the Adviser having less ability to respond to changing market conditions. The Fund may allocate its assets so as to under-emphasize or over-emphasize ETFs or other investments under the wrong market conditions, in which case the Fund’s NAV may be adversely affected. Market Disruption and Geopolitical Risks The value of your investment in the Fund is based on the values of the Fund’s investments, which may change due to economic and other events that affect markets generally, as well as those that affect particular regions, countries, industries, companies or governments. These movements, sometimes called volatility, may be greater or less depending on the types of securities the Fund owns and the markets in which the securities trade. The increasing interconnectivity between global economies and financial markets increases the likelihood that events or conditions in one region or financial market may adversely impact issuers in a different country, region or financial market. Securities in the Fund’s portfolio may underperform due to inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters, pandemics, epidemics, terrorism, regulatory events and governmental or quasi-governmental actions. The occurrence of global events similar to those in recent years, such as terrorist attacks around the world, natural di | ||||||||||||
| Effects of Leverage [Text Block] | Effects of Leverage The following table is furnished in response to requirements of the SEC. It is designed to illustrate the effect of leverage on total return on common shares, assuming investment portfolio total returns (comprised of income, net expenses and changes in the value of investments held in the Fund’s portfolio) of -10%, -5%, 0%, 5% and 10%. The table below reflects the Fund's continued use of Preferred Shares as of July 31, 2023 as a percentage of total managed assets (including assets attributable to such leverage), and the annual return that the Fund's portfolio must experience (net of expenses) in order to cover such costs. These assumed investment portfolio returns are hypothetical figures and are not necessarily indicative of what the Fund’s investment portfolio returns will be. In other words, the Fund’s actual returns may be greater or less than those appearing in the table below. The table further reflects the use of leverage representing approximately 27.02% of the Fund’s Managed Assets and estimated leverage costs of 6.00%. Assumed Portfolio Return -10.00% -5.00% 0.00% 5.00% 10.00% Common Share Total Return -15.92% -9.07% -2.22% 4.63% 11.48% Total return is composed of two elements—the dividends on common shares paid by the Fund (the amount of which is largely determined by the Fund’s net investment income after paying the cost of leverage) and realized and unrealized gains or losses on the value of the securities the Fund owns. As the table shows, leverage generally increases the return to common shareholders when portfolio return is positive or greater than the costs of leverage and decreases return when the portfolio return is negative or less than the costs of leverage. During the time in which the Fund is using leverage, the amount of the fees paid to the Adviser for investment management services is higher than if the Fund did not use leverage because the fees paid are calculated based on the Fund’s Managed Assets. This may create a conflict of interest between the Adviser, on the one hand, and common shareholders, on the other. Also, because the leverage costs are borne by the Fund at a specified interest rate, only the Fund’s common shareholders bear the cost of the Fund’s management fees and other expenses. There can be no assurance that a leveraging strategy will be successful during any period in which it is employed. | ||||||||||||
| Effects of Leverage [Table Text Block] | Assumed Portfolio Return -10.00% -5.00% 0.00% 5.00% 10.00% Common Share Total Return -15.92% -9.07% -2.22% 4.63% 11.48% | ||||||||||||
| Effects of Leverage, Purpose [Text Block] | The following table is furnished in response to requirements of the SEC. It is designed to illustrate the effect of leverage on total return on common shares, assuming investment portfolio total returns (comprised of income, net expenses and changes in the value of investments held in the Fund’s portfolio) of -10%, -5%, 0%, 5% and 10%. The table below reflects the Fund's continued use of Preferred Shares as of July 31, 2023 as a percentage of total managed assets (including assets attributable to such leverage), and the annual return that the Fund's portfolio must experience (net of expenses) in order to cover such costs. These assumed investment portfolio returns are hypothetical figures and are not necessarily indicative of what the Fund’s investment portfolio returns will be. In other words, the Fund’s actual returns may be greater or less than those appearing in the table below. The table further reflects the use of leverage representing approximately 27.02% of the Fund’s Managed Assets and estimated leverage costs of 6.00%. | ||||||||||||
| Share Price [Table Text Block] | Quarter Ended Market Price NAV at Market Premium (Discount) to NAV at High Low Market High Market Low Market High Market Low 2023 July 31 $ 11.51 $ 10.96 $ 12.32 $ 12.23 -6.57 -10.38 April 30 $ 12.50 $ 10.89 $ 12.82 $ 12.24 -2.50 -11.03 January 31 $ 13.29 $ 11.74 $ 12.73 $ 12.30 4.40 -4.55 2022 October 31 $ 15.20 $ 11.85 $ 13.82 $ 12.29 9.99 -3.58 July 31 $ 15.10 $ 12.56 $ 14.06 $ 13.01 7.40 -3.46 April 30 $ 16.68 $ 14.78 $ 15.87 $ 15.31 5.10 -3.46 January 31 $ 17.69 $ 14.86 $ 17.09 $ 15.64 3.51 -4.99 2021 October 31 $ 18.75 $ 16.71 $ 17.12 $ 16.87 9.52 -0.95 July 31 $ 18.75 $ 16.75 $ 17.24 $ 17.02 8.76 -1.59 April 30 $ 17.88 $ 16.71 $ 17.23 $ 16.61 3.77 0.60 January 31 $ 17.07 $ 13.81 $ 16.48 $ 14.53 3.58 -4.96 | ||||||||||||
| Not a Complete Investment Program [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Not a Complete Investment Program The Fund is intended for investors seeking capital appreciation and current income over the long-term, and is not intended to be a short-term trading vehicle. An investment in the Common Shares of the Fund should not be considered a complete investment program. Each investor should take into account the Fund’s investment objective and other characteristics as well as the investor’s other investments when considering an investment in the Common Shares. An investment in the Fund may not be appropriate for all investors. | ||||||||||||
| Risks Associated With Offerings Of Additional Common Shares [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Risks Associated with Offerings of Additional Common Shares The voting power of current Common Stockholders will be diluted to the extent that current Common Stockholders do not purchase Common Shares in any future offerings of Common Shares or do not purchase sufficient Common Shares to maintain their percentage interest. If the Fund is unable to invest the proceeds of such offering as intended, the Fund’s per Common Share distribution may decrease and the Fund may not participate in market advances to the same extent as if such proceeds were fully invested as planned. If the Fund sells Common Shares at a price below NAV pursuant to the consent of Common Stockholders, shareholders will experience a dilution of the aggregate NAV per Common Share because the sale price will be less than the Fund’s then-current NAV per Common Share. Similarly, were the expenses of the offering to exceed the amount by which the sale price exceeded the Fund’s then current NAV per Common Share, shareholders would experience a dilution of the aggregate NAV per Common Share. This dilution will be experienced by all shareholders, irrespective of whether they purchase Common Shares in any such offering. | ||||||||||||
| Additional Risks Of Rights [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Additional Risks of Rights There are additional risks associated with an offering of subscription rights to purchase Common Shares (“Rights”). Shareholders who do not exercise their Rights may, at the completion of such an offering, own a smaller proportional interest in the Fund than if they exercised their Rights. As a result of such an offering, a shareholder may experience dilution in NAV per share if the subscription price per share is below the NAV per share on the expiration date. If the subscription price per share is below the NAV per share of the Fund’s Common Shares on the expiration date, a shareholder will experience an immediate dilution of the aggregate NAV of such shareholder’s Common Shares if the shareholder does not participate in such an offering and the shareholder will experience a reduction in the NAV per share of such shareholder’s Common Shares whether or not the shareholder participates in such an offering. Such a reduction in NAV per share may have the effect of reducing market price of the Common Share. The Fund cannot state precisely the extent of this dilution (if any) if the shareholder does not exercise such shareholder’s Rights because the Fund does not know what the NAV per share will be when the offer expires or what proportion of the Rights will be exercised. If the subscription price is substantially less than the then current NAV per Common Share at the expiration of a rights offering, such dilution could be substantial. Any such dilution or accretion will depend upon whether (i) such shareholders participate in the rights offering and (ii) the Fund’s NAV per Common Share is above or below the subscription price on the expiration date of the rights offering. In addition to the economic dilution described above, if a Common Stockholder does not exercise all of their rights, the Common Stockholders will incur voting dilution as a result of this rights offering. This voting dilution will occur because the Common Stockholders will own a smaller proportionate interest in the Fund after the rights offering than prior to the rights offering. There is a risk that changes in market conditions may result in the underlying Common Shares purchasable upon exercise of the subscription rights being less attractive to investors at the conclusion of the subscription period. This may reduce or eliminate the value of the subscription rights. If investors exercise only a portion of the rights, the number of Common Shares issued may be reduced, and the Common Shares may trade at less favorable prices than larger offerings for similar securities. Subscription rights issued by the Fund may be transferable or non-transferable rights. In a non-transferable rights offering, Common Stockholders who do not wish to exercise their rights will be unable to sell their rights. In a transferrable rights offering, the Fund will use its best efforts to ensure an adequate trading market for the rights; however, investors may find that there is no market to sell rights they do not wish to exercise. | ||||||||||||
| Leverage Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Leverage Risks The Fund may borrow money, or issue debt or preferred stock. Since the holders of Common Shares pay all expenses related to the issuance of debt or use of leverage, the use of leverage through borrowing of money, issuance of debt securities or the issuance of preferred stock for investment purposes creates risks for the holders of Common Shares. Leverage is a speculative technique that exposes the Fund to greater risk and increased costs than if it were not implemented. Increases and decreases in the value of the Fund’s portfolio will be magnified when the Fund uses leverage. As a result, leverage may cause greater changes in the Fund’s NAV. The Fund will also have to pay interest on its borrowings or dividends on preferred stock, if any, which may reduce the Fund’s return. The leverage costs may be greater than the Fund’s return on the underlying investment. The Fund’s leveraging strategy may not be successful. If the Fund utilizes leverage in the form of borrowing, it anticipates that the money borrowed for investment purposes will incur interest based on shorter-term interest rates that would be periodically reset. So long as the Fund’s portfolio provides a higher rate of return, net of expenses, than the interest rate on borrowed money, as reset periodically, the leverage may cause the holders of Common Shares to receive a higher current rate of return than if the Fund were not leveraged. If, however, long-term and/or short-term rates rise, the interest rate on borrowed money could exceed the rate of return on securities held by the Fund, reducing return to the holders of Common Shares. There is no assurance that a leveraging strategy will be successful. Leverage involves risks and special considerations for Common Stockholders, including: • the likelihood of greater volatility of NAV, market price and dividend rate of the Common Shares than a comparable portfolio without leverage; • the risk that fluctuations in interest rates on borrowings or on short-term debt or in the interest or dividend rates on any debt securities or preferred shares that the Fund must pay will reduce the return to the Common Stockholders; • the effect of leverage in a declining market, which is likely to cause a greater decline in the NAV of the Common Shares than if the Fund were not leveraged, may result in a greater decline in the market price of the Common Shares; • when the Fund uses financial leverage, the investment management fees payable to the Adviser will be higher than if the Fund did not use leverage. This may create a conflict of interest between the Adviser, on the one hand, and the holders of Common Shares, on the other; and • leverage may increase operating costs, which may reduce total return. The use of leverage may require the Fund to segregate assets to cover its obligations (or, if the Fund borrows money or issues preferred shares, to maintain asset coverage in conformity with the requirements of the 1940 Act). While the segregated assets will be invested in liquid securities, they may not be used for other operational purposes. Consequently, the use of leverage may limit the Fund’s flexibility and may require that the Fund sell other portfolio investments to pay Fund expenses, to maintain assets in an amount sufficient to cover the Fund’s leveraged exposure or to meet other obligations at a time when it may be disadvantageous to sell such assets. Certain types of borrowings by the Fund may result in the Fund being subject to covenants in credit agreements relating to asset coverage and portfolio composition requirements. The Fund may be subject to certain restrictions on investments imposed by guidelines of one or more rating agencies, which may issue ratings for the short-term debt securities or preferred shares issued by the Fund. These guidelines may impose asset coverage or portfolio composition requirements that are more stringent than those imposed by the 1940 Act. The Adviser does not believe that these covenants or guidelines will impede it from managing the Fund’s portfolio in accordance with the Fund’s investment objective and policies if the Fund were to utilize leverage. Leverage risk would also apply to the Fund’s investments in Underlying Funds and SPACs to the extent an Underlying Fund or SPAC uses leverage. | ||||||||||||
| Market Discount [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Market Discount The stock of closed-end management investment companies often trade at a discount from their NAV, and the Fund’s Common Shares may likewise trade at a discount from NAV. The trading price of the Fund’s Common Shares may be less than the NAV. The returns earned by Common Stockholders who sell their Common Shares below NAV will be reduced. The Fund’s Common Shares are currently sold at a premium to NAV. This risk would also apply to the Fund’s investments in closed-end funds. | ||||||||||||
| Anti Takeover Provisions [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Anti-Takeover Provisions Maryland law and the Fund’s Charter and Bylaws include provisions that could limit the ability of other entities or persons to acquire control of the Fund or to convert the Fund to open-end status. These provisions could deprive the holders of Common Shares of opportunities to sell their Common Shares at a premium over the then current market price of the Common Shares or at NAV. This risk would also apply to many of the Fund’s investments in closed-end funds. | ||||||||||||
| Investment Related Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Investment-Related Risks: The risks listed below are in alphabetical order. With the exception of Underlying Fund risk (and except as otherwise noted below), the following risks apply to the direct investments the Fund may make, and generally apply to the Fund’s investments in Underlying Funds and SPACs. That said, each risk described below may not apply to each Underlying Fund or SPAC investment. Similarly, an Underlying Fund may be subject to additional or different risks than those described below. | ||||||||||||
| Asset Allocation Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Asset Allocation Risks To the extent that the Adviser’s asset allocation strategy may fail to produce the intended result, the Fund’s return may suffer. Additionally, the active asset allocation style of the Fund leads to changing allocations over time and represents a risk to investors who target fixed asset allocations. | ||||||||||||
| Convertible Securities Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Convertible Securities Risks The market value of convertible securities tends to fall when prevailing interest rates rise. The value of convertible securities also tends to change whenever the market value of the underlying common or preferred stock fluctuates. Convertible securities tend to be of lower credit quality. | ||||||||||||
| Defensive Measures [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Defensive Measures The Fund may invest up to 100% of its assets in cash, cash equivalents and short-term investments as a defensive measure in response to adverse market conditions or opportunistically at the discretion of the Adviser. During these periods or during periods when an Underlying Fund invests defensively, the Fund may not be pursuing its investment objective. | ||||||||||||
| Derivatives Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Derivatives Risks The Fund and the Underlying Funds may enter into derivatives transactions. Derivative transactions involve investment techniques and risks different from those associated with investments in Underlying Funds. Generally, a derivative is a financial contract the value of which depends upon, or is derived from, the value of an underlying asset, reference rate, or index, and may relate to individual debt or equity instruments, interest rates, currencies or currency exchange rates, commodities, related indexes, and other assets. Derivatives can be volatile and involve various types and degrees of risk, depending upon the characteristics of a particular derivative. Derivatives may entail investment exposures that are greater than their cost would suggest, meaning that a small investment in a derivative could have a large potential impact on the performance of a fund. A fund could experience a loss if derivatives do not perform as anticipated, if they are not correlated with the performance of other investments which they are used to hedge or if the fund is unable to liquidate a position because of an illiquid secondary market. The market for many derivatives is, or can suddenly become, illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices of derivatives. When used for speculative purposes, derivatives will produce enhanced investment exposure, which will magnify gains and losses. Certain derivatives transactions may give rise to a form of leverage. The use of leverage may cause a fund to liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations. Leverage may cause a fund to be more volatile than if it had not been leveraged. This is because leverage tends to exaggerate the effect of any increase or decrease in the value of the fund’s portfolio securities. Further, using derivatives may include the risk of mispricing or improper valuation of derivatives and the inability of derivatives to correlate perfectly, or at all, with the value of the assets, reference rates or indexes they are designed to closely track. The Fund also will be subject to credit risk with respect to the counterparties to the derivatives contracts purchased by the Fund. If a counterparty becomes bankrupt or otherwise fails to perform its obligations under a derivative contract due to financial difficulties, the Fund may experience significant delays in obtaining any recovery under the derivative contract in a bankruptcy or other reorganization proceeding. The Fund may obtain only a limited recovery or may obtain no recovery in such circumstances. On October 28, 2020, the Securities and Exchange Commission (“SEC”) adopted Rule 18f-4 under the 1940 Act relating to a registered investment company’s use of derivatives and related instruments. Rule 18f-4 prescribes specific value-at-risk leverage limits for certain derivatives users and requires certain derivatives users to adopt and implement a derivatives risk management program (including the appointment of a derivatives risk manager and the implementation of certain testing requirements), and prescribes reporting requirements in respect of derivatives. Subject to certain conditions, if a fund qualifies as a “limited derivatives user,” as defined in Rule 18f-4, it is not subject to the full requirements of Rule 18f-4. In connection with the adoption of Rule 18f-4, the SEC rescinded certain of its prior guidance regarding asset segregation and coverage requirements in respect of derivatives transactions and related instruments. With respect to reverse repurchase agreements or other similar financing transactions in particular, Rule 18f-4 permits a fund to enter into such transactions if the fund either (i) complies with the asset coverage requirements of Section 18 of the 1940 Act, and combines the aggregate amount of indebtedness associated with all similar financing with the aggregate amount of any other senior securities representing indebtedness when calculating the relevant asset coverage ratio, or (ii) treats all similar financing transactions as derivatives transactions for all purposes under Rule 18f-4. The Fund was required to comply with Rule 18f-4 beginning August 19, 2022 and has adopted procedures for investing in derivatives and other transactions in compliance with Rule 18f-4. Disclosure regarding Rule 18f-4 under the 1940 Act has been added since the prior disclosure date. | ||||||||||||
| Defaulted And Distressed Securities Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Defaulted and Distressed Securities Risks The Underlying Funds may invest directly in defaulted and distressed securities. Legal difficulties and negotiations with creditors and other claimants are common when dealing with defaulted or distressed companies. Defaulted or distressed companies may be insolvent or in bankruptcy. In the event of a default, an Underlying Fund may incur additional expenses to seek recovery. The repayment of defaulted bonds is subject to significant uncertainties, and in some cases, there may be no recovery of repayment. Defaulted bonds might be repaid only after lengthy workout or bankruptcy proceedings, during which the issuer might not make any interest or other payments. Because of the relative illiquidity of defaulted or distressed debt and equity securities, short sales are difficult, and most Underlying Funds primarily maintain long positions. Some relative value trades are possible, where an investor sells short one class of a defaulted or distressed company’s capital structure and purchases another. With distressed investing, often there is a time lag between when an Underlying Fund makes an investment and when the Underlying Fund realizes the value of the investment. In addition, an Underlying Fund may incur legal and other monitoring costs in protecting the value of the Underlying Fund’s claims. | ||||||||||||
| Equity Securities Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Equity Securities Risks While equity securities have historically generated higher average returns than fixed income securities, equity securities have also experienced significantly more volatility in those returns. An adverse event, such as an unfavorable earnings report, may depress the value of an issuer’s equity securities held by an Underlying Fund. Equity security prices fluctuate for several reasons, including changes in investors’ perceptions of the financial condition of an issuer or the general condition of the relevant stock market, or when political or economic events affecting the issuers occur. The value of a particular equity security may fall in value. The prices of stocks change in response to many factors, including the historical and prospective earnings of the issuer, the value of its assets, management decisions, decreased demand for an issuer’s products or services, increased production costs, general economic conditions, interest rates, currency exchange rates, investor perceptions and market liquidity. The value of an Underlying Fund’s shares will go up and down due to movement in the collective returns of the individual securities held by the Underlying Fund. Common stocks are subordinate to preferred stocks and debt in a company’s capital structure, and if a company is liquidated, the claims of secured and unsecured creditors and owners of preferred stocks take precedence over the claims of those who own Common Shares. In addition, equity security prices may be particularly sensitive to rising interest rates, as the cost of capital rises and borrowing costs increase. | ||||||||||||
| Exchange Traded Note Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Exchange-Traded Note Risks The Fund and the Underlying Funds may invest in exchange-traded notes (“ETNs”), which are notes representing unsecured debt issued by an underwriting bank. ETNs are typically linked to the performance of an index plus a specified rate of interest that could be earned on cash collateral. The value of an ETN may be influenced by time to maturity, level of supply and demand for the ETN, volatility and lack of liquidity in underlying markets, changes in the applicable interest rates, changes in the issuer’s credit rating and economic, legal, political or geographic events that affect the referenced index. ETNs typically mature 30 years from the date of issue. The issuer’s credit rating will be investment grade at the time of investment, however, the credit rating may be revised or withdrawn at any time and there is no assurance that a credit rating will remain in effect for any given time period. If a rating agency lowers the issuer’s credit rating, the value of the ETN will decline and a lower credit rating reflects a greater risk that the issuer will default on its obligation. When a fund invests in ETNs, it will bear its proportionate share of any fees and expenses associated with investment in such securities. Such fees reduce the amount of return on investment at maturity or upon redemption. There may be restrictions on a fund’s right to liquidate its investment in an ETN prior to maturity (for example, a fund may only be able to offer its ETN for repurchase by the issuer on a weekly basis), since ETNs are meant to be held until maturity. A fund’s decision to sell its ETN holdings may be limited by the availability of a secondary market. | ||||||||||||
| Fixed Income Securities Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Fixed Income Securities Risks The Underlying Funds and the Fund may invest in fixed income securities. Fixed income securities increase or decrease in value based on changes in interest rates. If rates increase, the value of an Underlying Fund’s fixed income securities generally declines. On the other hand, if rates fall, the value of the fixed income securities generally increases. The issuer of a fixed income security may not be able to make interest and principal payments when due. This risk is increased in the case of issuers of high yield securities, also known as “junk bonds.” If a U.S. Government agency or instrumentality in which an Underlying Fund invests defaults, and the U.S. Government does not stand behind the obligation, the Underlying Fund’s share price or yield could fall. Securities of certain U.S. Government sponsored entities are neither issued nor guaranteed by the U.S. Government. The Underlying Funds may invest in fixed income securities of any credit quality, maturity or duration. Fixed income securities risks include components of the following additional risks: | ||||||||||||
| Credit Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Credit Risk. | ||||||||||||
| High Yield Securities Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | High Yield Securities Risk. | ||||||||||||
| U S Government Securities Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | U.S. Government Securities Risk. | ||||||||||||
| Interest Rate Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Interest Rate Risk. Interest rates in the United States and many other countries have risen in recent periods and may continue to rise in the future. Additionally, as a result of increasing interest rates, reserves held by banks and other financial institutions in bonds and other debt securities could face a significant decline in value relative to deposits and liabilities, which coupled with general economic headwinds resulting from a changing interest rate environment, creates liquidity pressures at such institutions, as evidenced by the bank run on the Silicon Valley Bank Financial Group (“SVB”) causing it to be placed into receivership. As a result, certain sectors of the credit markets could experience significant declines in liquidity, and it is possible that the Fund (or an Underlying Fund) will not be able to manage this risk effectively. It is yet to be determined how the bank run on SVB will fully impact the overall performance of the Fund or an Underlying Fund and how similar events may affect the ability of the Fund or an Underlying Fund to execute its investment strategy. | ||||||||||||
| Sovereign Obligation Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Sovereign Obligation Risk. | ||||||||||||
| Foreign Investing Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Foreign Investing Risks The Fund and the Underlying Funds may invest in foreign securities. Investments in foreign securities may be affected by currency controls and exchange rates; different accounting, auditing, financial reporting, and legal standards and practices; expropriation; changes in tax policy; social, political and economic instability; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. In addition, changes in government administrations or economic or monetary policies in the United States or abroad could result in appreciation or depreciation of the Fund’s or Underlying Fund’s securities. These risks may be heightened in connection with investments in emerging or developing countries. To the extent that a Fund or Underlying Fund invests in depositary receipts, the Fund or Underlying Fund will be subject to many of the same risks as when investing directly in foreign securities. The effect of recent, worldwide economic instability on specific foreign markets or issuers may be difficult to predict or evaluate, and some national economies continue to show profound instability, which may in turn affect their international trading partners. | ||||||||||||
| Illiquid Securities Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Illiquid Securities Risks The Underlying Funds may invest in illiquid securities. It may not be possible to sell or otherwise dispose of illiquid securities both at the price and within the time period deemed desirable by a fund. Illiquid securities also may be difficult to value. | ||||||||||||
| Initial Public Offerings Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Initial Public Offerings Risks The Fund and the Underlying Funds may purchase securities in initial public offerings (“IPOs”). Because securities sold in an IPO frequently are volatile in price, the Fund or an Underlying Fund may hold IPO shares for a very short period of time. This may increase the turnover of a fund’s portfolio and may lead to increased expenses to the fund, such as commissions and transaction costs. By selling shares, a fund may realize taxable capital gains that it will subsequently distribute to shareholders. Investing in IPOs has added risks because the shares are frequently volatile in price. As a result, their performance can be more volatile and they face greater risk of business failure, which could increase the volatility of a fund’s portfolio. The Fund’s IPO investments may be in IPOs of Underlying Funds. There is a significant risk that the shares of closed-end funds purchased in an IPO will trade at a price below their IPO price. | ||||||||||||
| Investment And Market Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Investment and Market Risks An investment in Common Shares is subject to investment risk, including the possible loss of the entire principal amount invested. An investment in Common Shares represents an indirect investment in the Underlying Funds owned by the Fund. The value of the Underlying Funds, like other market investments, may move up or down, sometimes rapidly and unpredictably. Overall stock market risks may also affect the NAV of the Fund or the Underlying Funds. Factors such as domestic and foreign economic growth and market conditions, interest rate levels and political events affect the securities markets. The Common Shares at any point in time may be worth less than the original investment, even after taking into account any reinvestment of dividends and distributions. | ||||||||||||
| Legislation Policy And Regulatory Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Legislation, Policy and Regulatory Risks At any time after the date of this annual report, legislation or additional regulations may be enacted that could negatively affect the assets of the Fund or the issuers of such assets. Recent changes in the U.S. political landscape and changing approaches to regulation may have a negative impact on the entities and/or securities in which the Fund or an Underlying Fund invests. Legislation or regulation may also change the way in which the Fund or an Underlying Fund is regulated. New or amended regulations may be imposed by the Commodity Futures Trading Commission (“CFTC”), the SEC, the Board of Governors of the Federal Reserve System or other financial regulators, other governmental regulatory authorities or self-regulatory organizations that supervise the financial markets that could adversely affect the Fund or the Underlying Funds. In particular, these agencies are empowered to promulgate a variety of new rules pursuant to financial reform legislation in the United States. There can be no assurance that future legislation, regulation or deregulation will not have a material adverse effect on the Fund or will not impair the ability of the Fund to achieve its investment objective. The Fund and the Underlying Funds also may be adversely affected by changes in the enforcement or interpretation of existing statutes and rules by these governmental regulatory authorities or self regulatory organizations. | ||||||||||||
| L I B O R Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | LIBOR Risk Certain of the Fund's or Underlying Funds’ investments, payment obligations and financing terms may be based on floating rates, such as LIBOR, Euro Interbank Offered Rate and other similar types of reference rates. In July of 2017, the head of the United Kingdom Financial Conduct Authority (“FCA”) announced a desire to phase out the use of LIBOR at the end of 2021. Most LIBOR settings are no longer published as of December 31, 2021. Overnight and 12-month U.S. dollar LIBOR settings permanently ceased after publication on June 30, 2021. 1-, 3-and 6-month U.S. dollar LIBOR settings will continue to be published using a synthetic methodology until September 2024. Neither the effect of the LIBOR transition process nor its ultimate success can yet be known. Although the transition away from LIBOR has become increasingly well-defined, any potential effects of the transition away from LIBOR and other benchmark rates on financial markets, a fund or the financial instruments in which a fund invests can be difficult to ascertain. Not all existing LIBOR-based instruments may have alternative rate-setting provisions and there remains uncertainty regarding the willingness and ability of issuers to add alternative rate-setting provisions in certain existing instruments. Global regulators have advised market participants to cease entering into new contracts using LIBOR as a reference rate, and it is possible that investments in LIBOR-based instruments could invite regulatory scrutiny. In addition, a liquid market for newly-issued instruments that use a reference rate other than LIBOR still may be developing. All of the aforementioned may adversely affect the Fund’s or an Underlying Fund’s performance or NAV. | ||||||||||||
| Management Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Management Risks The Adviser’s judgments about the attractiveness, value and potential appreciation of a particular asset class or individual security in which the Fund invests may prove to be incorrect and there is no guarantee that the Adviser’s judgment will produce the desired results. Similarly, the Fund’s investments in Underlying Funds are subject to the judgment of the Underlying Funds’ managers which may prove to be incorrect. In addition, the Adviser will have limited information as to the portfolio holdings of the Underlying Funds at any given time. This may result in the Adviser having less ability to respond to changing market conditions. The Fund may allocate its assets so as to under-emphasize or over-emphasize ETFs or other investments under the wrong market conditions, in which case the Fund’s NAV may be adversely affected. | ||||||||||||
| Market Disruption And Geopolitical Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Market Disruption and Geopolitical Risks The value of your investment in the Fund is based on the values of the Fund’s investments, which may change due to economic and other events that affect markets generally, as well as those that affect particular regions, countries, industries, companies or governments. These movements, sometimes called volatility, may be greater or less depending on the types of securities the Fund owns and the markets in which the securities trade. The increasing interconnectivity between global economies and financial markets increases the likelihood that events or conditions in one region or financial market may adversely impact issuers in a different country, region or financial market. Securities in the Fund’s portfolio may underperform due to inflation (or expectations for inflation), interest rates, global demand for particular products or resources, natural disasters, pandemics, epidemics, terrorism, regulatory events and governmental or quasi-governmental actions. The occurrence of global events similar to those in recent years, such as terrorist attacks around the world, natural disasters, social and political discord or debt crises and downgrades, among others, may result in market volatility and may have long term effects on both the U.S. and global financial markets. The occurrence of such events may be sudden and unexpected, and it is difficult to predict when similar events affecting the U.S. or global financial markets may occur, the effects that such events may have and the duration of those effects. Any such event(s) could have a significant adverse impact on the value, liquidity and risk profile of the Fund’s portfolio, as well as its ability to sell securities to meet redemptions. There is a risk that you may lose money by investing in the Fund. Social, political, economic and other conditions and events, such as natural disasters, health emergencies (e.g., epidemics and pandemics), terrorism, conflicts and social unrest, may occur and could significantly impact issuers, industries, governments and other systems, including the financial markets. As global systems, economies and financial markets are increasingly interconnected, events that once had only local impact are now more likely to have regional or even global effects. Events that occur in one country, region or financial market will, more frequently, adversely impact issuers in other countries, regions or markets. These impacts can be exacerbated by failures of governments and societies to adequately respond to an emerging event or threat. These types of events quickly and significantly impact markets in the U.S. and across the globe leading to extreme market volatility and disruption. The extent and nature of the impact on supply chains or economies and markets from these events is unknown, particularly if a health emergency or other similar event persists for an extended period of time. Social, political, economic and other conditions and events, such as natural disasters, health emergencies (e.g., epidemics and pandemics), terrorism, conflicts and social unrest, could reduce consumer demand or economic output, result in market closures, travel restrictions or quarantines, and generally have a significant impact on the economies and financial markets and the Adviser’s investment advisory activities and services of other service providers, which in turn could adversely affect the Fund’s investments and other operations. The value of the Fund’s investment may decrease as a result of such events, particularly if these events adversely impact the operations and effectiveness of the Adviser or key service providers or if these events disrupt systems and processes necessary or beneficial to the investment advisory or other activities on behalf the Fund. In early 2020, an outbreak of a novel strain of coronavirus (COVID-19) emerged globally. The outbreak of COVID-19 and its variants resulted in closing international borders, enhanced health screenings, healthcare service preparation and delivery, quarantines, cancellations, disruptions to supply chains and customer activity, as well as general public concern and uncertainty. This outbreak negatively affected the worldwide economy, as well as the economies of individual countries, the financial health of individual companies and the market in general in significant and unforeseen ways. On May 5, 2023, the World Health Organization declared the end of the global emergency status for COVID-19. The United States subsequently ended the federal COVID-19 public health emergency declaration effective May 11, 2023. Although vaccines for COVID-19 are widely available, it is unknown how long certain circumstances related to the pandemic will persist, whether they will reoccur in the future and what additional implications may follow from the pandemic. The impact of these events and other epidemics or pandemics in the future could adversely affect Fund performance. In February 2022, Russia commenced a military attack on Ukraine. The outbreak of hostilities between the two countries and the threat of wider-spread hostilities could have a severe adverse effect on the region and global economies, including significant negative impacts on the markets for certain securities and commodities, such as oil and natural gas. In addition, sanctions imposed on Russia by the United States and other countries, and any sanctions imposed in the future, could have a significant adverse impact on the Russian economy and related markets. The price and liquidity of investments may fluctuate widely as a result of the conflict and related events. How long the armed conflict and related events will last cannot be predicted. These tensions and any related events could have a significant impact on Fund performance and the value of Fund investments. Disclosures related to the COVID-19 pandemic and Russian military attack on Ukraine have been updated since the prior disclosure date. | ||||||||||||
| Master Limited Partnerships Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Master Limited Partnerships Risks The Underlying Funds may invest in MLPs. Investments in publicly traded MLPs, which are limited partnerships or limited liability companies taxable as partnerships, involve some risks that differ from an investment in the common stock of a corporation, including risks related to limited control and limited rights to vote on matters affecting MLPs, risks related to potential conflicts of interest between an MLP and the MLP’s general partner, cash flow risks, dilution risks and risks related to the general partner’s right to require unit-holders to sell their common units at an undesirable time or price. MLPs may derive income and gains from the exploration, development, mining or production, processing, refining, transportation (including pipelines transporting gas, oil, or products thereof), or the marketing of any mineral or natural resources. MLPs generally have two classes of owners, the general partner and limited partners. When investing in an MLP, an Underlying Fund generally purchases publicly traded common units issued to limited partners of the MLP. The general partner is typically owned by a major energy company, an investment fund, the direct management of the MLP or is an entity owned by one or more of such parties. The general partner may be structured as a private or publicly traded corporation or other entity. The general partner typically controls the operations and management of the MLP through an up to 2% equity interest in the MLP plus, in many cases, ownership of common units and subordinated units. Limited partners own the remainder of the partnership, through ownership of common units, and have a limited role in the partnership’s operations and management. As compared to common stockholders of a corporation, holders of MLP common units have more limited control and limited rights to vote on matters affecting the partnership. MLPs are typically structured such that common units and general partner interests have first priority to receive quarterly cash distributions up to an established minimum amount (“minimum quarterly distributions” or “MQD”). Common and general partner interests also accrue arrearages in distributions to the extent the MQD is not paid. Once common and general partner interests have been paid, subordinated units receive distributions of up to the MQD; however, subordinated units do not accrue arrearages. Distributable cash in excess of the MQD paid to both common and subordinated units is distributed to both common and subordinated units generally on a pro rata basis. The general partner is also eligible to receive incentive distributions if the general partner operates the business in a manner which results in distributions paid per common unit surpassing specified target levels. As the general partner increases cash distributions to the limited partners, the general partner receives an increasingly higher percentage of the incremental cash distributions. A common arrangement provides that the general partner can reach a tier where it receives 50% of every incremental dollar paid to common and subordinated unit holders. These incentive distributions encourage the general partner to streamline costs, increase capital expenditures and acquire assets in order to increase the partnership’s cash flow and raise the quarterly cash distribution in order to reach higher tiers. Such results benefit all security holders of the MLP. MLP common units represent a limited partnership interest in the MLP. MLP common units are listed and traded on U.S. securities exchanges, with their value fluctuating predominantly based on prevailing market conditions and the success of the MLP. An Underlying Fund may purchase MLP common units in market transactions. Unlike owners of common stock of a corporation, owners of MLP common units have limited voting rights and have no ability to elect directors. In the event of liquidation, MLP common units have preference over subordinated units, but not over debt or preferred units, to the remaining assets of the MLP. MLPs may be subject to legal and other restrictions on resale or will otherwise be less liquid than publicly traded securities. Certain MLP securities may trade in lower volumes due to their smaller capitalizations. Accordingly, those MLPs may be subject to more abrupt or erratic price movements and may lack sufficient market liquidity to enable an Underlying Fund to effect sales at an advantageous time or without a substantial drop in price. As a result, these investments may be difficult to dispose of at a fair price at the times when an Underlying Fund believes it is desirable to do so. MLPs are generally considered interest-rate sensitive investments. During periods of interest rate volatility, these investments may not provide attractive returns, which may adversely impact the overall performance of the Fund or an Underlying Fund. MLPs are subject to various risks related to the underlying operating companies they control, including dependence upon specialized management skills and the risk that those operating companies may lack or have limited operating histories. The success an Underlying Fund’s investments in an MLP will vary depending on the underlying industry represented by the MLP’s portfolio. Certain MLPs in which an Underlying Fund may invest depend upon their parent or sponsor entities for the majority of their revenues. Certain MLPs in which an Underlying Fund may invest depend upon a limited number of customers for substantially all of their revenue. Similarly, certain MLPs in which an Underlying Fund may invest depend upon a limited number of suppliers of goods or services to continue their operations. The loss of those customers or suppliers could have a material adverse effect on an MLP’s results of operations and cash flow, and on its ability to make distributions to unit holders such as an Underlying Fund. The benefit an Underlying Fund will derive from its investment in MLPs will be largely dependent on the MLPs being treated as partnerships and not as corporations for federal income tax purposes. As a partnership, an MLP generally has no tax liability at the entity level. If, as a result of a change in current law or a change in an MLP’s business, an MLP were treated as a corporation for federal income tax purposes, such MLP would be obligated to pay federal income tax on its income at the corporate tax rate. If an MLP were classified as a corporation for federal income tax purposes, the amount of cash available for distribution by the MLP would be reduced and distributions received by an Underlying Fund would be taxed under federal income tax laws applicable to corporate dividends (as dividend income, return of capital, or capital gain). Therefore, treatment of an MLP as a corporation for federal income tax purposes would result in a reduction in the after-tax return to an Underlying Fund, likely causing a reduction in the value of the Common Shares. | ||||||||||||
| Micro Small And Medium Sized Company Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Micro-, Small- and Medium-Sized Company Risks The Underlying Funds may invest in securities without regard to market capitalization. Investments in securities of micro-, small-and medium-sized companies may be subject to more abrupt or erratic market movements than larger, more established companies, because these securities typically are traded in lower volume and issuers are typically more subject to changes in earnings and future earnings prospects. Small- and medium-sized companies often have narrower markets for their goods and/or services and more limited managerial and financial resources than larger, more established companies. Furthermore, these companies often have limited product lines, services, markets or financial resources, or are dependent on a small management group. Since these stocks are not well-known to the investing public, do not have significant institutional ownership and are followed by relatively few security analysts, there will normally be less publicly available information concerning these securities compared to what is available for the securities of larger companies. Adverse publicity and investor perceptions, whether or not based on fundamental analysis, can decrease the value and liquidity of securities held by the Fund. As a result, small- and medium-sized companies’ performance can be more volatile and the companies face greater risk of business failure, which could increase the volatility of the Fund’s portfolio. The risks are intensified for investments in micro-cap companies. | ||||||||||||
| Options And Futures Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Options and Futures Risks The Fund and the Underlying Funds may invest in options and futures contracts. The use of futures and options transactions entails certain special risks. In particular, the variable degree of correlation between price movements of futures contracts and price movements in the related securities position of the Fund or an Underlying Fund could create the possibility that losses on the hedging instrument are greater than gains in the value of the Fund’s or Underlying Fund’s position. In addition, futures and options markets could be illiquid in some circumstances and certain over-the-counter options could have no markets. As a result, in certain markets, the Fund or an Underlying Fund might not be able to close out a transaction without incurring substantial losses. Although the Fund’s or an Underlying Fund’s use of futures and options transactions for hedging should tend to minimize the risk of loss due to a decline in the value of the hedged position, at the same time it will tend to limit any potential gain to the Fund or an Underlying Fund that might result from an increase in value of the position. There is also the risk of loss by the Fund or an Underlying Fund of margin deposits in the event of bankruptcy of a broker with whom the Fund or Underlying Fund has an open position in a futures contract or option thereon. Finally, the daily variation margin requirements for futures contracts create a greater ongoing potential financial risk than would purchases of options, in which case the exposure is limited to the cost of the initial premium. However, because option premiums paid by the Fund or an Underlying Fund are small in relation to the market value of the investments underlying the options, buying options can result in large amounts of leverage. This leverage offered by trading in options could cause the Fund’s or an Underlying Fund’s NAV to be subject to more frequent and wider fluctuation than would be the case if the Fund or Underlying Fund did not invest in options. Options transactions may be effected on securities exchanges or in the over-the-counter market. When options are purchased over-the-counter, the Fund or an Underlying Fund bears the risk that the counterparty that wrote the option will be unable or unwilling to perform its obligations under the option contract. The counterparties to these transactions typically will be major international banks, broker-dealers and financial institutions. Such options may also be illiquid, and in such cases, the Fund or an Underlying Fund may have difficulty closing out its position. Banks, broker- dealers or other financial institutions participating in such transactions may fail to settle a transaction in accordance with the terms of the option as written. In the event of default or insolvency of the counterparty, the Fund or an Underlying Fund may be unable to liquidate an over-the-counter option position. The Fund may purchase put options. An Underlying Fund may purchase and sell call and put options with respect to specific securities, and may write and sell covered or uncovered call and put options. A call option gives the purchaser of the call option, in return for a premium paid, the right to buy the security underlying the option from the writer of the call option at a specified exercise price within a specified time frame. A put option gives the purchaser of the put option, in return for a premium paid, the right to sell the underlying security to the writer of the put option at a specified price within a specified time frame. A covered call option is a call option with respect to an underlying security that a fund owns. A covered put option is a put option with respect to which a fund has segregated cash or liquid securities to fulfill the obligation of the option. The purchaser of a put or call option runs the risk of losing the purchaser’s entire investment, paid as the premium, in a relatively short period of time if the option is not sold at a gain or cannot be exercised at a gain prior to expiration. In selling put options, there is a risk that the Underlying Fund may be required to buy the underlying security at a disadvantageous price above the market price. The un-covered writer of a call option is subject to a risk of loss if the price of the underlying security should increase, and the un-covered writer of a put option is subject to a risk of loss if the price of the underlying security should decrease. The Fund may invest a significant portion of its total assets in Underlying Funds that write covered call options. To the extent that an Underlying Fund writes a covered call option, it forgoes, during the option’s life, the opportunity to profit from increases in the market value of the security covering the call option above the sum of the premium and the strike price of the call, but has retained the risk of loss should the price of the underlying security decline. As the writer of the option, the Underlying Fund bears the market risk of an unfavorable change in the price of the security underlying a written option. As an Underlying Fund writes covered calls over more of its portfolio, its ability to benefit from capital appreciation becomes more limited and the risk of NAV erosion increases. To the extent an Underlying Fund experiences NAV erosion (which itself may have an indirect negative effect on the market price of interests in the Underlying Fund), the Underlying Fund will have a reduced asset base over which to write covered calls, which may eventually lead to reduced distributions to shareholders such as the Fund. The writer of an option has no control over the time when it may be required to fulfill its obligation as a writer of the option. Once an option writer has received an exercise notice, it cannot effect a closing purchase transaction in order to terminate its obligation under the option and must deliver the underlying security at the exercise price. To the extent that an Underlying Fund engages in selling options that trade in over-the-counter markets, the Underlying Fund may be subject to additional risks. Participants in these markets are typically not subject to the same credit evaluation and regulatory oversight as members of “exchange based” markets. By engaging in option transactions in these markets, an Underlying Fund may take credit risk with regard to parties with which it trades and also may bear the risk of settlement default. These risks may differ materially from those involved in exchange-traded transactions, which generally are characterized by clearing organization guarantees, daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. Transactions entered into directly between two counterparties generally do not benefit from these protections, which may subject an Underlying Fund to the risk that a counterparty will not settle a transaction in accordance with agreed terms and conditions because of a dispute over the terms of the contract or because of a credit or liquidity problem. Such “counterparty risk” is increased for contracts with longer maturities when events may intervene to prevent settlement. The Fund or an Underlying Fund may enter into futures contracts in U.S. domestic markets or on exchanges located outside of the United States. Foreign markets may offer advantages, including trading opportunities or arbitrage possibilities, not available in the United States. Foreign markets, however, may have greater risk potential than domestic markets. For example, some foreign exchanges are principal markets, so that no common clearing facility exists and an investor may look only to the broker or counterparty for the performance of the contract. Unlike trading on domestic commodity exchanges, trading on foreign commodity exchanges is not regulated by the Commodity Futures Trading Commission. There can be no assurance that a liquid market will exist for any particular futures contract at any particular time. Many futures exchanges and boards of trade limit the amount of fluctuation permitted in futures contract prices during a single trading day. Once the daily limit has been reached in a particular contract, no trades may be made that day of a price beyond that limit or trading may be suspended for specified periods during the trading day. The Fund or an Underlying Fund may purchase and sell single stock futures, stock index futures contracts, interest rate futures contracts, currency futures and other commodity futures. A stock index future obligates a fund to pay or receive an amount of cash based upon the value of a stock index at a specified date in the future. An interest rate futures contract obligates a fund to purchase or sell an amount of a specific debt security at a future date at a specified price. A currency futures contract obligates a fund to purchase or sell an amount of a specific currency at a future date at a future price. If the Fund or an Underlying Fund purchases an option and the price of the underlying stock fails to move in the expected direction, the Fund or Underlying Fund will lose most or all of the amount the fund paid for the option, plus commission costs. If an Underlying Fund writes (“sells”) an option and the price of the underlying stock fails to move in the expected direction, the Underlying Fund’s losses could easily exceed the proceeds it received when it wrote the options. | ||||||||||||
| Private Debt Risk [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Private Debt Risk The Fund may invest in debt issued by non-listed funds and BDCs (“Private Debt”). Private Debt often may be illiquid and is typically not listed on an exchange and traded less actively than similar securities issued by publicly traded-vehicles. For certain Private Debt investments, trading may only be possible through the assistance of the broker who originally brought the security to the market and has a relationship with the issuer. Due to the limited trading market, independent pricing services may be unable to provide a price for Private Debt, and as such the fair value of the securities may be determined in good faith under procedures approved by the Board, which typically will include the use of one or more independent broker quotes. | ||||||||||||
| Real Estate Investment Trust Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Real Estate Investment Trust (“REIT”) Risks The Underlying Funds may invest in equity and mortgage REITs. Equity REITs invest in real estate, and mortgage REITs invest in loans secured by real estate. Investing in REITs involves certain unique risks in addition to those risks associated with investing in the real estate industry in general. Equity REITs may be affected by changes in the value of the underlying property owned by the REITs, while mortgage REITs may be affected by the quality of any credit extended. REITs are dependent upon management skills, are not diversified, and are subject to heavy cash flow dependency, default by borrowers and self-liquidation. REITs also are subject to the possibilities of failing to qualify for tax free pass-through of income under the Internal Revenue Code of 1986, as amended (the “Code”), and failing to maintain their exemption from registration under the 1940 Act. Investment in REITs involves risks similar to those associated with investing in small capitalization companies, and REITs (especially mortgage REITs) are subject to interest rate risks. When interest rates decline, the value of a REIT’s investment in fixed rate obligations can be expected to rise. Conversely, when interest rates rise, the value of a REIT’s investment in fixed rate obligations can be expected to decline. By investing in REITs directly or indirectly through the Underlying Funds, the Fund will indirectly bear its proportionate share of the expenses of the REITs. The expenses at the REIT level are not included in the Fund’s expense table as acquired fund fees and expenses. | ||||||||||||
| Securities Lending Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Securities Lending Risks The Underlying Funds may engage in securities lending. Securities lending involves counterparty risk, including the risk that the loaned securities may not be returned in a timely manner and/or a loss of rights in the collateral if the borrower or the lending agent defaults. This risk is increased when an Underlying Fund’s loans are concentrated with a single or limited number of borrowers. In addition, an Underlying Fund bears the risk of loss in connection with the investments of the cash collateral it receives from the borrower. To the extent that the value or return of an Underlying Fund’s investments of the cash collateral declines below the amount owed to a borrower, the Underlying Fund may incur losses that exceed the amount it earned in lending the security. | ||||||||||||
| Securities Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Securities Risks The value of the Fund or an Underlying Fund may decrease in response to the activities and financial prospects of individual securities in the Fund’s portfolio. | ||||||||||||
| Senior Loan Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Senior Loan Risks The Underlying Funds may invest in senior secured floating rate and fixed-rate loans (“Senior Loans”). There is less readily available and reliable information about most Senior Loans than is the case for many other types of instruments, including listed securities. Senior Loans are not listed on any national securities exchange or automated quotation system and as such, many Senior Loans are illiquid, meaning that an Underlying Fund may not be able to sell them quickly at a fair price. To the extent that a secondary market does exist for certain Senior Loans, the market is more volatile than for liquid, listed securities and may be subject to irregular trading activity, wide bid/ask spreads and extended trade settlement periods. The market for Senior Loans could be disrupted in the event of an economic downturn or a substantial increase or decrease in interest rates. Senior Loans, like most other debt obligations, are subject to the risk of default. Default in the payment of interest or principal on a Senior Loan will result in a reduction of income to the Fund, a reduction in the value of the Senior Loan and a potential decrease in the Fund’s NAV of the Common Shares. The Underlying Funds may acquire or hold Senior Loans of borrowers that are experiencing, or are more likely to experience, financial difficulty, including Senior Loans issued to highly leveraged borrowers or borrowers that have filed for bankruptcy protection. Borrowers may have outstanding debt obligations, including Senior Loans, that are rated below investment grade. An Underlying Fund may invest a substantial portion of its assets in Senior Loans that are rated below investment grade or that are unrated at the time of purchase but are deemed by the Underlying Fund’s adviser’s to be of comparable quality. The values of Senior Loans of borrowers that have filed for bankruptcy protection or that are experiencing payment difficulty could be affected by, among other things, the assessment of the likelihood that the lenders ultimately will receive repayment of the principal amount of such Senior Loans, the likely duration, if any, of a lapse in the scheduled payment of interest and repayment of principal and prevailing interest rates. There is no assurance that an Underlying Fund will be able to recover any amount on Senior Loans of such borrowers or that sale of the collateral granted in connection with Senior Loans would raise enough cash to satisfy the borrower’s payment obligation or that the collateral can or will be liquidated. In the event of bankruptcy, liquidation may not occur and the bankruptcy court may not give lenders the full benefit of their senior position in the capital structure of the borrower. | ||||||||||||
| Short Sale Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Short Sale Risks The Fund and Underlying Funds may sell securities short. Positions in shorted securities are speculative and more risky than long positions (purchases) in securities because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs, whereas there is no maximum attainable price of the shorted security. Therefore, in theory, securities sold short have unlimited risk. Short selling will also result in higher transaction costs (such as interest and dividends), directly or indirectly through the investments in Underlying Funds, and may result in higher taxes, which reduce the Fund’s return. If a security sold short increases in price, a fund may have to cover its short position at a higher price than the short sale price, resulting in a loss. With respect to a fund’s short positions, the Fund must borrow those securities to make delivery to the buyer. A fund may not be able to borrow a security that it needs to deliver or it may not be able to close out a short position at an acceptable price and may have to sell related long positions before it had intended to do so. As a result, a fund may not be able to successfully implement its short sale strategy due to the limited availability of desired securities or for other reasons. When borrowing a security for delivery to a buyer, a fund also may be required to pay a premium and other transaction costs, which would increase the cost of the security sold short. A fund must normally repay to the lender an amount equal to any dividends or interest earned while the loan is outstanding. The amount of any gain will be decreased, and the amount of any loss increased, by the amount of the premium, dividends, interest or expenses a fund may be required to pay in connection with the short sale. Also, the lender of a security may terminate the loan at a time when a fund is unable to borrow the same security for delivery. In that case, a fund would need to purchase a replacement security at the then current market price or “buy in” by paying the lender an amount equal to the costs of purchasing the security. Until a fund replaces a borrowed security, it is required to maintain a segregated account of cash or liquid assets to cover the fund’s short position. Securities held in a segregated account cannot be sold while the position they are covering is outstanding, unless they are replaced with similar securities. Additionally, a fund must maintain sufficient liquid assets (less any additional collateral held by the broker), marked-to-market daily, to cover its short sale obligations. This may limit a fund’s investment flexibility, as well as its ability to meet redemption requests or other current obligations. In addition, until a fund replaces a borrowed instrument, a fund may also be required to maintain short sale proceeds with the lending broker as collateral. Moreover, a fund will be required to make margin payments to the lender during the term of the borrowing if the value of the security it borrowed (and sold short) increases. Thus, short sales involve credit exposure to the broker that executes the short sales. In the event of the bankruptcy or other similar insolvency with respect to a broker with whom a fund has an open short position, a fund may be unable to recover, or be delayed in recovering, any margin or other collateral held with or for the lending broker. Because a fund’s loss on a short sale arises from increases in the value of the security sold short, the loss is theoretically unlimited. In certain cases, purchasing a security to cover a short position can itself cause the price of the security to rise further, which would exacerbate the loss. Conversely, gains on short sales, after transaction and related costs, are generally the difference between the price at which a fund sold the borrowed security and the price it paid to purchase the security for delivery to the buyer. By contrast, a fund’s loss on a long position arises from decreases in the value of the security and is limited by the fact that a security’s value cannot drop below zero. By investing the proceeds received from selling securities short, the Fund is using a form of leverage, which creates special risks. The use of leverage may increase the Fund’s exposure to long equity positions and make any change in the Fund’s NAV greater than it would be without the use of leverage. This could result in increased volatility of returns. There is no guarantee that the Fund will leverage its portfolio, or if it does, that the Fund’s leveraging strategy will be successful. The Fund also cannot guarantee that the use of leverage will produce a higher return on an investment. | ||||||||||||
| S O F R Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | SOFR Risk SOFR is intended to be a broad measure of the cost of borrowing funds overnight in transactions that are collateralized by U.S. Treasury securities. SOFR is calculated based on transaction-level repodata collected from various sources. For each trading day, SOFR is calculated as a volume-weighted median rate derived from such data. SOFR is calculated and published by the Federal Reserve Bank of New York (“FRBNY”). If data from a given source required by the FRBNY to calculate SOFR is unavailable for any day, then the most recently available data for that segment will be used, with certain adjustments. If errors are discovered in the transaction data or the calculations underlying SOFR after its initial publication on a given day, SOFR may be republished at a later time that day. Rate revisions will be effected only on the day of initial publication and will be republished only if the change in the rate exceeds one basis point. Because SOFR is a financing rate based on overnight secured funding transactions, it differs fundamentally from LIBOR. LIBOR was intended to be an unsecured rate that represents interbank funding costs for different short-term maturities or tenors. It was a forward-looking rate reflecting expectations regarding interest rates for the applicable tenor. Thus, LIBOR was intended to be sensitive, in certain respects, to bank credit risk and to term interest rate risk. In contrast, SOFR is a secured overnight rate reflecting the credit of U.S. Treasury securities as collateral. Thus, it is largely insensitive to credit-risk considerations and to short-term interest rate risks. SOFR is a transaction-based rate, and it has been more volatile than other benchmark or market rates, such as three-month LIBOR, during certain periods. For these reasons, among others, there is no assurance that SOFR, or rates derived from SOFR, will perform in the same or similar way as LIBOR would have performed at any time, and there is no assurance that SOFR-based rates will be a suitable substitute for LIBOR. SOFR has a limited history, having been first published in April 2018. The future performance of SOFR, and SOFR-based reference rates, cannot be predicted based on SOFR’s history or otherwise. Levels of SOFR in the future, including following the discontinuation of LIBOR, may bear little or no relation to historical levels of SOFR, LIBOR or other rates. The inclusion of SOFR Risk is a change since the prior disclosure date. | ||||||||||||
| Special Purpose Acquisition Companies Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Special Purpose Acquisition Companies Risks The Fund may invest in SPACs. SPACs are collective investment structures that pool funds in order to seek potential acquisition opportunities. Unless and until an acquisition is completed, a SPAC generally invests its assets (less an amount to cover expenses) in U.S. government securities, money market fund securities and cash. SPACs and similar entities may be blank check companies with no operating history or ongoing business other than to seek a potential acquisition. Accordingly, the value of their securities is particularly dependent on the ability of the entity’s management to identify and complete a profitable acquisition. Certain SPACs may seek acquisitions only in limited industries or regions, which may increase the volatility of their prices. If an acquisition that meets the requirements for the SPAC is not completed within a predetermined period of time, the invested funds are returned to the entity’s shareholders. Investments in SPACs may be illiquid and/or be subject to restrictions on resale. To the extent the SPAC is invested in cash or similar securities, this may impact the Fund’s ability to meet its investment objective. The officers and directors of a SPAC may operate multiple SPACs and could have conflicts of interest in determining to which SPAC a particular business opportunity should be presented. In such circumstances, there can be no assurance that a given business opportunity would be presented to the SPAC in which the Fund holds an investment. | ||||||||||||
| Structured Notes Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Structured Notes Risks The Underlying Funds may invest in structured notes. Structured notes are subject to a number of fixed income risks including general market risk, interest rate risk, and the risk that the issuer on the note may fail to make interest and/or principal payments when due, or may default on its obligations entirely. In addition, because the performance of structured notes tracks the performance of the underlying debt obligation, structured notes generally are subject to more risk than investing in a simple note or bond issued by the same issuer. It is impossible to predict whether the referenced factor (such as an index or interest rate) or prices of the underlying securities will rise or fall. To the extent that an Underlying Fund invests in structured notes, the Underlying Fund may be more volatile than other funds that do not invest in structured notes. The actual trading prices of structured notes may be significantly different from the principal amount of the notes. If an Underlying Fund sells the structured notes prior to maturity, it may suffer a loss of principal. At final maturity, structured notes may be redeemed in cash or in kind, which is at the discretion of the issuer. If the notes are redeemed in kind, a fund would receive shares of stock at a depressed price. To the extent that a structured note is not principal-protected through an insurance feature, the note’s principal will not be protected. In the case of a decrease in the value of the underlying asset, an Underlying Fund would receive shares at a value less than the original amount invested; while an increase in the value of an underlying asset will not increase the return on the note. | ||||||||||||
| Swap Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Swap Risks The Fund and the Underlying Funds may enter into interest rate, index, total return and currency swap agreements. Swap agreements are two-party contracts under which the fund and a counterparty, such as a broker or dealer, agree to exchange the returns (or differentials in rates of return) earned or realized on an agreed-upon underlying asset or investment over the term of the swap. The use of swap transactions is a highly specialized activity which involves strategies and risks different from those associated with ordinary portfolio security transactions. If the Adviser or an Underlying Fund’s investment adviser is incorrect in its forecasts of default risks, market spreads, liquidity or other applicable factors or events, the investment performance of the Fund or Underlying Fund would diminish compared with what it would have been if these techniques were not used. Swaps and swap options can be used for a variety of purposes, including: to manage fund exposure to changes in interest or foreign currency exchange rates and credit quality; as an efficient means of adjusting fund overall exposure to certain markets; in an effort to enhance income or total return or protect the value of portfolio securities; to serve as a cash management tool; and to adjust portfolio duration. There are risks in the use of swaps. Swaps could result in losses if interest or foreign currency exchange rates or credit quality changes are not correctly anticipated. Total return swaps could result in losses if the reference index, security, or investments do not perform as anticipated. Total return swaps involve an enhanced risk that the issuer or counterparty will fail to perform its contractual obligations. Total return swaps may effectively add leverage to the Fund’s portfolio because the Fund would be subject to investment exposure on the full notional amount of the swap. To the extent the Fund or an Underlying Fund enters into a total return swap on equity securities, the Fund or the Underlying Fund will receive the positive performance of a notional amount of such securities underlying the total return swap. In exchange, the Fund or the Underlying Fund will be obligated to pay the negative performance of such notional amount of securities. Therefore, the Fund or the Underlying Fund assumes the risk of a substantial decrease in the market value of the equity securities. The use of swaps may not always be successful; using them could lower fund total return, their prices can be highly volatile, and the potential loss from the use of swaps can exceed the fund’s initial investment in such instruments. Also, the other party to a swap agreement could default on its obligations or refuse to cash out the fund’s investment at a reasonable price, which could turn an expected gain into a loss. Currently, certain categories of interest rate swaps are subject to mandatory clearing, and more are expected to be cleared in the future. The counterparty risk for cleared derivatives is generally expected to be lower than for uncleared over-the-counter derivative transactions as each party to a transaction looks only to the central clearing house for performance of obligations under the transaction. However, there can be no assurance that a clearing house, or its members, will satisfy the clearing house’s obligations to the fund or that the fund’s use of swaps will be advantageous. | ||||||||||||
| Underlying Fund Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Underlying Fund Risks The Fund will invest in Underlying Funds such as other closed-end funds and ETFs. The expenses of the Fund will generally be higher than the direct expenses of other fund shares. The Fund will indirectly bear fees and expenses charged by the Underlying Funds in which the Fund invests in addition to the Fund’s direct fees and expenses. The Fund may also incur brokerage costs when it purchases shares of Underlying Funds. Furthermore, investments in Underlying Funds could affect the timing, amount and character of distributions to Common Stockholders and therefore may increase the amount of taxes payable by investors in the Fund. The value of your investment in the Fund will go up and down with the prices of Underlying Fund shares (and other securities) in which the Fund invests. Similarly, the value of the Fund’s investments in Underlying Funds will go up and down with the prices of the securities in which the Underlying Funds invest. There is also the risk that the Fund may suffer losses due to the investment practices or operations of the Underlying Funds. To the extent that the Fund invests in one or more Underlying Funds that concentrate in a particular industry, the Fund would be vulnerable to factors affecting that industry and the concentrating Underlying Funds’ performance, and that of the Fund, may be more volatile than Underlying Funds that do not concentrate. As the Fund will invest at least 80% of its Managed Assets in Underlying Funds, the Fund’s performance will depend to a greater extent on the overall performance of closed-end funds, ETFs, BDCs and SPACs generally, in addition to the performance of the specific Underlying Funds (and other assets) in which the Fund invests. The use of leverage by Underlying Funds magnifies gains and losses on amounts invested and increases the risks associated with investing in Underlying Funds. Further, the Underlying Funds are not subject to the Fund’s investment policies and restrictions. The Fund generally receives information regarding the portfolio holdings of Underlying Funds only when that information is made available to the public. The Fund cannot dictate how the Underlying Funds invest their assets. The Underlying Funds may invest their assets in securities and other instruments, and may use investment techniques and strategies, that are not described in this disclosure. Common Stockholders will bear two layers of fees and expenses with respect to the Fund’s investments in Underlying Funds because each of the Fund and the Underlying Fund will charge fees and incur separate expenses. In addition, subject to applicable 1940 Act limitations, the Underlying Funds themselves may purchase securities issued by registered and unregistered funds (e.g., common stock, preferred stock, auction rate preferred stock), and those investments would be subject to the risks associated with Underlying Funds and unregistered funds (including a third layer of fees and expenses, i.e., the Underlying Fund will indirectly bear fees and expenses charged by the funds in which the Underlying Fund invests, in addition to the Underlying Fund’s own fees and expenses). An Underlying Fund with positive performance may indirectly receive a performance fee from the Fund, even when the Fund’s overall returns are negative. Additionally, the Fund’s investment in an Underlying Fund may result in the Fund’s receipt of cash in excess of the Underlying Fund’s earnings; if the Fund distributes these amounts, the distributions could constitute a return of capital to Fund shareholders for federal income tax purposes. As a result of these factors, the use of the fund of funds structure by the Fund could therefore affect the amount, timing and character of distributions to shareholders. The Fund may invest in shares of closed-end funds that are trading at a discount to NAV or at a premium to NAV and closed-end funds may not be able to outperform their benchmarks. There can be no assurance that the market discount on shares of any closed-end fund purchased by the Fund will ever decrease. In fact, it is possible that this market discount may increase and the Fund may suffer realized or unrealized capital losses due to further decline in the market price of the securities of such closed-end funds, thereby adversely affecting the Fund’s NAV. The Fund’s investment in the Common Shares of closed-end funds that are financially leveraged may create an opportunity for greater total return on its investment, but at the same time may be expected to exhibit more volatility in market price and NAV than an investment in shares of investment companies without a leveraged capital structure. The Fund may invest in BDCs. BDCs generally invest in less mature U.S. private companies or thinly traded U.S. public companies which involve greater risk than well-established publicly-traded companies. While BDCs are expected to generate income in the form of dividends, certain BDCs during certain periods of time may not generate such income. The Fund will indirectly bear its proportionate share of any management fees and other operating expenses incurred by the BDCs and of any performance-based or incentive fees payable by the BDCs in which it invests, in addition to the expenses paid by the Fund. A BDC’s incentive fee may be very high, vary from year to year and be payable even if the value of the BDC’s portfolio declines in a given time period. Incentive fees may create an incentive for a BDC’s manager to make investments that are risky or more speculative than would be the case in the absence of such compensation arrangements, and may also encourage the BDC’s manager to use leverage to increase the return on the BDC’s investments. The use of leverage by BDCs magnifies gains and losses on amounts invested and increases the risks associated with investing in BDCs. A BDC may make investments with a larger amount of risk of volatility and loss of principal than other investment options and may also be highly speculative and aggressive. The 1940 Act imposes certain constraints upon the operations of a BDC. For example, BDCs are required to invest at least 70% of their total assets primarily in securities of U.S. private companies or thinly traded U.S. public companies, cash, cash equivalents, U.S. government securities and high quality debt investments that mature in one year or less. Generally, little public information exists for private and thinly traded companies in which a BDC may invest and there is a risk that investors may not be able to make a fully informed evaluation of a BDC and its portfolio of investments. With respect to investments in debt instruments, there is a risk that the issuers of such instruments may default on their payments or declare bankruptcy. Many debt investments in which a BDC may invest will not be rated by a credit rating agency and will be below investment grade quality. These investments are commonly referred to as “junk bonds” and have predominantly speculative characteristics with respect to an issuer’s capacity to make payments of interest and principal. Although lower grade securities are potentially higher yielding, they are also characterized by high risk. In addition, the secondary market for lower grade securities may be less liquid than that of higher rated securities. Certain BDCs may also be difficult to value since many of the assets of BDCs do not have readily ascertainable market values. Additionally, a BDC may only incur indebtedness in amounts such that the BDC’s asset coverage ratio of total assets to total senior securities equals at least 200% after such incurrence. These limitations on asset mix and leverage may affect the way that the BDC raises capital. BDCs compete with other entities for the types of investments they make, and such entities are not necessarily subject to the same investment constraints as BDCs. Index-based ETFs (and other index funds) in which the Fund may invest may not be able to replicate exactly the performance of the indices they track or benchmark because the total return generated by the securities will be reduced by transaction costs incurred in adjusting the actual balance of the securities. ETFs may trade at a price above (premium) or below (discount) their NAV, especially during periods of significant market volatility or stress, causing investors to pay significantly more or less than the value of the ETF’s underlying portfolio. Certain ETFs traded on exchanges may be thinly traded and experience large spreads between the “ask” price quoted by a seller and the “bid” price offered by a buyer. While the creation/redemption feature is designed to make it likely that ETF shares normally will trade close to their NAVs, market prices are not expected to correlate exactly to the shares’ NAVs due to timing reasons, supply and demand imbalances and other factors. In addition, disruptions to creations and redemptions, adverse developments impacting market makers, authorized participants or other market participants, high market volatility or lack of an active trading market for an ETF’s shares (including through a trading halt) may result in market prices that differ significantly from its NAV or to the intraday value of the ETF’s holdings. An active trading market for shares of an ETF may not develop or be maintained. When all or a portion of an ETF’s underlying securities trade in a foreign market that is closed during the time the domestic market in which the ETF’s shares are listed and traded is open, there may be changes between the last quote from the closed foreign market and the value of such underlying security during the ETF’s trading day. In times of market stress, market makers or authorized participants may step away from their respective roles in making a market in shares of the ETF and in executing purchase or redemption orders. During such times, the ETF’s shares may trade at a wider than normal discount or premium and may possibly face trading halts. Additionally, the underlying securities of an ETF may be traded outside of a collateralized settlement system, such as the National Securities Clearing Corporation, a clearing agency that is registered with the SEC. There are a limited number of financial institutions that may act as authorized participants that pose collateral for certain trades on an agency basis. To the extent that these authorized participants exit the business or are unable to proceed with creation and/or redemption orders with the ETF, and no other authorized participant is able to step forward, ETF shares may trade at a discount to NAV and possibly face trading halts and/or delisting. Additionally, in stressed market conditions, the market for ETF shares may become less liquid in response to deteriorating liquidity in the markets for such ETF’s underlying portfolio holdings, and this may cause the shares of the ETF to trade at a wider than normal discount or premium. Furthermore, purchases and redemptions of creation units primarily in cash rather than in-kind may cause an ETF to incur certain costs, such as brokerage costs, taxable gains or other losses that it may not have incurred with an in-kind purchase or redemption. These costs may be borne by the ETF and decrease the ETF’s NAV to the extent they are not offset by a transaction fee payable by an authorized participant. In addition, index-based ETFs (and other index funds) will incur expenses not incurred by their applicable indices. Certain securities comprising the indices tracked by these investments may, from time to time, temporarily be unavailable, which may further impede the ability of the index-based ETFs and other index funds to track their applicable indices. Underlying Funds may not be able to match or outperform their respective benchmarks. With sector ETFs, there is a risk that securities within the same group of industries will decline in price due to sector-specific market or economic developments. The Fund may also invest in actively managed ETFs that are subject to management risk as the ETF’s investment adviser will apply certain investment techniques and risk analyses in making investment decisions. There can be no guarantee that these will produce the desired results. Certain of the Underlying Funds in which the Fund will invest may be taxed as regulated investment companies under Subchapter M of the Code. To qualify and remain eligible for the special tax treatment accorded to regulated investment companies and their shareholders, such Underlying Funds must meet certain source-of-income, asset diversification and annual distribution requirements. If an Underlying Fund in which the Fund invests fails to qualify as a regulated investment company, such Underlying Fund would be liable for federal, and possibly state, corporate taxes on its taxable income and gains. Such failure by an Underlying Fund could substantially reduce the Underlying Fund’s net assets and the amount of income available for distribution to the Fund, which would in turn decrease the total return of the Fund in respect of such investment. The Fund’s investments in Underlying Funds may be restricted by certain provisions of the 1940 Act. Under Section 12(d)(1)(A) of the 1940 Act, the Fund may hold securities of an Underlying Fund in amounts which (i) do not exceed 3% of the total outstanding voting stock of the Underlying Fund, (ii) do not exceed 5% of the value of the Fund’s total assets and (iii) when added to all other Underlying Fund securities held by the Fund, do not exceed 10% of the value of the Fund’s total assets. Under Section 12(d)(1)(C) of the 1940 Act, the Fund, together with any other investment companies for which the Adviser acts as an investment adviser, may not, in the aggregate, own more than 10% of the total outstanding voting stock of a registered closed-end investment company. Section 12(d)(1)(F) of the 1940 Act provides that the limitations of Section 12(d)(1) described above shall not apply to securities purchased or otherwise acquired by the Fund if (i) immediately after such purchase or acquisition not more than 3% of the total outstanding stock of such Underlying Fund is owned by the Fund and all affiliated persons of the Fund, and (ii) certain requirements are met with respect to sales charges. In addition, Rule 12d1-4 under the 1940 Act (“Rule 12d1-4”), effective as of January 19, 2022, permits the Fund to invest in Underlying Funds beyond the limitations of Section 12(d)(1) described above, subject to various conditions, including that the Fund enter into an investment agreement with the Underlying Fund (which agreements may impose additional conditions on the Fund). In matters upon which the Fund is solicited to vote as a shareholder of an Underlying Fund, the Adviser may be required to vote Underlying Fund shares in the same proportion as shares held by other shareholders of the Underlying Fund. | ||||||||||||
| Warrant Risks [Member] | |||||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Risk [Text Block] | Warrant Risks The Fund and the Underlying Funds may invest in warrants. Warrants are securities giving the holder the right, but not the obligation, to buy the stock of an issuer at a given price (generally higher than the value of the stock at the time of issuance) during a specified period or perpetually. Warrants do not carry with them the right to dividends or voting rights with respect to the securities that they entitle their holder to purchase and they do not represent any rights in the assets of the issuer. The value of a warrant does not necessarily change with the value of the underlying securities and a warrant ceases to have value if it is not exercised prior to its expiration date. | ||||||||||||
| Common Shares [Member] | |||||||||||||
| Fee Table [Abstract] | |||||||||||||
| Sales Load [Percent] | [1] | 0% | |||||||||||
| Dividend Reinvestment and Cash Purchase Fees | [2] | $ 0 | |||||||||||
| Other Transaction Expenses [Abstract] | |||||||||||||
| Other Transaction Expenses [Percent] | [1] | 0% | |||||||||||
| Management Fees [Percent] | [1],[3],[4] | 1.73% | |||||||||||
| Interest Expenses on Borrowings [Percent] | [1],[4],[5] | 0% | |||||||||||
| Dividend and Interest Expenses on Short Sales [Percent] | [1],[4],[5] | 0.18% | |||||||||||
| Acquired Fund Fees and Expenses [Percent] | [1],[4],[6] | 1.25% | |||||||||||
| Other Annual Expenses [Abstract] | |||||||||||||
| Other Annual Expenses [Percent] | [1],[4],[5] | 0.18% | |||||||||||
| Total Annual Expenses [Percent] | [1],[4] | 3.34% | |||||||||||
| Expense Example, Year 01 | [4] | $ 34 | |||||||||||
| Expense Example, Years 1 to 3 | [4] | 103 | |||||||||||
| Expense Example, Years 1 to 5 | [4] | 174 | |||||||||||
| Expense Example, Years 1 to 10 | [4] | $ 363 | |||||||||||
| General Description of Registrant [Abstract] | |||||||||||||
| Return at Minus Ten [Percent] | (15.92%) | ||||||||||||
| Return at Minus Five [Percent] | (9.07%) | ||||||||||||
| Return at Zero [Percent] | (2.22%) | ||||||||||||
| Return at Plus Five [Percent] | 4.63% | ||||||||||||
| Return at Plus Ten [Percent] | 11.48% | ||||||||||||
| Lowest Price or Bid | $ 10.96 | $ 10.89 | $ 11.74 | $ 11.85 | $ 12.56 | $ 14.78 | $ 14.86 | $ 16.71 | $ 16.75 | $ 16.71 | $ 13.81 | ||
| Highest Price or Bid | 11.51 | 12.50 | 13.29 | 15.20 | 15.10 | 16.68 | 17.69 | 18.75 | 18.75 | 17.88 | 17.07 | ||
| Lowest Price or Bid, NAV | 12.23 | 12.24 | 12.30 | 12.29 | 13.01 | 15.31 | 15.64 | 16.87 | 17.02 | 16.61 | 14.53 | ||
| Highest Price or Bid, NAV | $ 12.32 | $ 12.82 | $ 12.73 | $ 13.82 | $ 14.06 | $ 15.87 | $ 17.09 | $ 17.12 | $ 17.24 | $ 17.23 | $ 16.48 | ||
| Highest Price or Bid, Premium (Discount) to NAV [Percent] | (6.57%) | (2.50%) | 4.40% | 9.99% | 7.40% | 5.10% | 3.51% | 9.52% | 8.76% | 3.77% | 3.58% | ||
| Lowest Price or Bid, Premium (Discount) to NAV [Percent] | (10.38%) | (11.03%) | (4.55%) | (3.58%) | (3.46%) | (3.46%) | (4.99%) | (0.95%) | (1.59%) | 0.60% | (4.96%) | ||
| [1]If Common Shares are sold to or through underwriters, the Prospectus Supplement will set forth any applicable sales load and the estimated offering expenses borne by the Fund.[2]There will be no brokerage charges with respect to Common Shares issued directly by the Fund under the dividend reinvestment plan. You will pay brokerage charges in connection with open market purchases or if you direct the plan agent to sell your Common Shares held in a dividend reinvestment account.[3] The management fee paid by the Fund to the Adviser is essentially an all-in fee structure (the “unified management fee”), including the fee paid to the Adviser for advisory, supervisory, administrative, shareholder servicing and other services. However, the Fund (and not the Adviser) will be responsible for certain additional fees and expenses, which are reflected in the table above, that are not covered by the unified management fee. The unified management fee is charged as a percentage of the Fund’s average daily Managed Assets, as opposed to net assets. With leverage, Managed Assets are greater in amount than net assets, because Managed Assets include assets attributable to the Fund’s use of leverage created by its borrowings. In addition, the mark-to-market value of the Fund’s derivatives will be used for purposes of calculating Managed Assets. The management fee of 1.30% of the Fund’s Managed Assets represents 1.73% of net assets attributable to Common Shares assuming the use of leverage in an amount of 24% of the Fund’s Managed Assets. Other Expenses, Interest Expense on Borrowings and Dividend and Interest Expense on Short Sales are estimated based on the Fund’s Annual report dated July 31, 2023. The “Acquired Fund Fees and Expenses” disclosed above are based on the expense ratios for the most recent fiscal year of the Underlying Funds in which the Fund anticipates investing, which may change substantially over time and, therefore, significantly affect Acquired Fund Fees and Expenses. These amounts are based on the total expense ratio disclosed in each Underlying Fund’s most recent stockholder report. Some of the Underlying Funds in which the Fund intends to invest charge incentive fees based on the Underlying Funds’ performance. The 1.25% shown as Acquired Fund Fees and Expenses reflects estimated operating expenses of the Underlying Funds and transaction-related fees. Certain Underlying Funds in which the Fund intends to invest generally charge a management fee of 1.00% to 2.00%, which are included in “Acquired Fund Fees and Expenses,” as applicable. The Acquired Fund Fees and Expenses disclosed above, however, do not reflect any performance-based fees or allocations paid by the Underlying Funds that are calculated solely on the realization and/or distribution of gains, or on the sum of such gains and unrealized appreciation of assets distributed in-kind, as such fees and allocations for a particular period may be unrelated to the cost of investing in the Underlying Funds. Acquired Fund Fees and Expenses are borne indirectly by the Fund, but they will not be reflected in the Fund’s financial statements; and the information presented in the table will differ from that presented in the Fund’s financial highlights. | |||||||||||||
