Total Annual Operating Expenses in this fee table may not correlate to the expense ratios in the Fund’s financial highlights (and the Fund’s financial statements) because the financial highlights include only the Fund’s direct operating expenses and do not include Acquired Fund Fees and Expenses, which represent the Fund’s pro rata share of the fees and expenses of the exchange-traded funds in which it invests.

Expense Example Narrative [Text Block]

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This Example is intended to help you compare the cost of investing in the shares of the Fund with the cost of investing in other funds. This Example does not take into account creation or redemption transaction fees, or the brokerage commissions that you pay when purchasing or selling shares of the Fund. If these fees and commissions were included, your costs would be higher.

The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy Narrative [Text Block]

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The Fund is considered a “fund of funds” that seeks to achieve its investment objective by primarily investing in both long and short positions in other affiliated and unaffiliated exchange traded funds (“ETFs”) that offer diversified exposure to fixed income and other income producing securities. The Fund’s investments may, at various times, represent all available segments of the fixed income market, including, but not limited to, bonds and instruments issued by the U.S. government, foreign government bonds, U.S. or foreign investment grade corporate debt, high yield bonds, municipal bonds, mortgage-backed securities, and emerging markets debt. The Fund may also invest in equity, inverse or other types of ETFs to supplement its fixed income ETF positions. The Fund intends to invest the majority of its assets in investments that provide a competitive yield on a risk-adjusted basis. The Fund will also allocate its investments to instruments that provide little or no yield for diversification or risk management purposes.

In seeking to achieve its investment objective, the Fund may also invest directly in U.S.-traded fixed income and equity securities, certain derivatives, such as options, futures, and structured notes, and other exchange-traded products (together with ETFs, “ETPs”). On a day-to-day basis, the Fund may hold money market instruments, cash, other cash equivalents, and ETPs that invest in these and other highly liquid instruments to collateralize its derivative or short positions.

Risk Narrative [Text Block]

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The Fund is subject to a number of risks, as described below, that may affect the value of its shares, including the possible loss of money. As with any fund, there is no guarantee that the Fund will achieve its investment objective.

Allocation Risk. The Fund’s particular allocations may have a significant effect on the Fund’s performance. Allocation risk is the risk that the selection of ETPs and the allocation of assets among such ETPs will cause the Fund to underperform other funds with a similar investment objective that do not allocate their assets in the same manner or the market as a whole.

Counterparty Risk. The Fund may invest in financial instruments involving counterparties that attempt to gain exposure to a particular group of securities, index or asset class without actually purchasing those securities or investments, or to hedge a position. The Fund’s use of such financial instruments, including swap agreements and structured notes, involves risks that are different from those associated with ordinary portfolio securities transactions. For example, if a swap agreement counterparty defaults on its payment obligations to the Fund, this default will cause the value of your investment in the Fund to decrease.

Credit Risk. The Fund could lose money if the issuer or guarantor of a debt instrument in which the Fund invests becomes unwilling or unable to make timely principal and/or interest payments, or to otherwise meet its obligations. Credit risk is heightened to the extent the Fund invests in high yield bonds.

Derivatives Risk. Derivatives may be riskier than other types of investments because they may be more sensitive to changes in economic or market conditions than other types of investments and could result in losses that significantly exceed the Fund’s original investment. A derivative is a financial contract the value of which depends on, or is derived from, the value of a financial asset (such as stock, bond or currency), a physical asset (such as gold) or a market index (such as the S&P 500 Index). Many derivatives create leverage thereby causing the Fund to be more volatile than it would be if it had not invested in derivatives. Derivatives also expose the Fund to counterparty risk (the risk that the derivative counterparty will not fulfill its contractual obligations) and to credit risk.

Equity Risk . The prices of equity securities may rise and fall daily. These price movements may result from factors affecting individual issuers, industries or the securities market as a whole. In addition, equity markets tend to move in cycles which may cause stock prices to fall over short or extended periods of time.

Exchange-Traded Product Risk. Through its investments in ETPs, the Fund is subject to the risks associated with the ETPs’ investments, including the possibility that the value of the securities or instruments held by or linked to an ETP could decrease. These risks include any combination of the risks described below, as well as certain of the other risks described in this section. The Fund’s exposure to a particular risk will be proportionate to the Fund’s overall allocation to ETPs and the ETPs’ asset allocation.

Commodity Risk. Because certain of the ETPs may have a significant portion of their assets exposed directly or indirectly to commodities or commodity-linked securities, developments affecting commodities may have a disproportionate impact on such ETPs. An ETP’s investment in commodities or commodity-linked derivative instruments may subject the ETP (and indirectly the Fund) to greater volatility than investments in traditional securities, particularly if the instruments involve leverage. The value of commodities and commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as drought, floods, weather, livestock disease, embargoes, tariffs and international economic, political and regulatory developments.

Emerging Markets Risk. There is an increased risk of price volatility associated with an ETP’s investments in emerging market countries, which may be magnified by currency fluctuations relative to the U.S. dollar.

Foreign Currency Risk. Currency movements may negatively impact the value of an ETP portfolio security even when there is no change in the value of the security in the issuer’s home country. Certain of the ETPs may not hedge against the risk of currency exchange rate fluctuations, while other ETPs may if there is volatility in currency exchange rates.

Foreign Securities Risk. An ETP’s investments in or exposure to foreign issuers involve certain risks, including, but not limited to, risks of adverse changes in foreign economic, political, regulatory and other conditions, or changes in currency exchange rates or exchange control regulations (including limitations on currency movements and exchanges). In certain countries, legal remedies available to investors may be more limited than those available with respect to investments in the United States. In addition, the securities of some foreign companies may be less liquid and, at times, more volatile than securities of comparable U.S. companies.

Mortgage-Backed Securities Risk. Impairment of the value of collateral underlying a mortgage-backed security (for example, due to non-payment of loans) may result in a reduction in the value of such security. In the event of prepayment of the loan at a time when interest rates are falling, the unanticipated proceeds may have to be reinvested at lower interest rates, resulting in a decline in income.

Real Estate Investment Trusts (REITs) Risk. Certain of the ETPs invest in REITs. An ETP’s investments in REITs will be subject to the risks associated with the direct ownership of real estate. Risks commonly associated with the direct ownership of real estate include fluctuations in the value of underlying properties, defaults by borrowers or tenants, changes in interest rates and risks related to general or local economic conditions. REITs are more dependent upon specialized management skills, have limited diversification and are, therefore, generally dependent on their ability to generate cash flow to make distributions to shareholders. In addition, REITs have their own expenses, and the ETP will bear a proportionate share of those expenses.

U.S. Government Securities Risk. U.S. government securities are subject to price fluctuations and to default in the event that an agency or instrumentality defaults on an obligation not backed by the full faith and credit of the United States.

Fixed Income Securities Risk. The market value of fixed income investments may be impacted by credit risk, interest rate risk, income risk, counterparty risk and other factors.

Income Risk. The income from the Fund’s investments may decline because of falling market interest rates. This can result when the Fund invests the proceeds from new share sales, or from matured or called bonds, at market interest rates that are below the Fund portfolio’s current earnings rate.

Interest Rate Risk. During periods of falling interest rates, the value of outstanding fixed income securities generally rise. Conversely, during periods of rising interest rates, the value of fixed income securities generally decline.

Issuer Risk. The value of a debt security may decline for a number of reasons directly related to the issuer of such security, such as management performance, financial leverage and reduced demand for the issuer’s goods or services.

Liquidity Risk. Liquidity risk exists when particular Fund investments are difficult to purchase or sell. This can reduce the Fund’s returns because the Fund may be unable to transact at advantageous times or prices.

Management Risk. The Sub-Advisor continuously evaluates the Fund’s holdings, purchases and sales with a view to achieving the Fund’s investment objective. However, the achievement of the stated investment objective cannot be guaranteed over short- or long-term market cycles. The Sub-Advisor’s judgments about the markets, the economy, or companies may not anticipate actual market movements, economic conditions or company performance, and these judgments may affect the return on your investment.

Market Risk. Due to market conditions, the value of the Fund’s investments may fluctuate significantly from day to day. This volatility may cause the value of your investment in the Fund to decrease.

Portfolio Turnover Risk. The Fund may experience relatively high portfolio turnover, which may result in increased transaction costs and Fund performance that is lower than expected.

Short Sales Risk. Short sales are transactions in which the Fund sells a security it does not own. To complete the transaction, the Fund must borrow the security to make delivery to the buyer. The Fund is then obligated to replace the security borrowed by purchasing the security at the market price at the time of replacement. The price at such time may be higher or lower than the price at which the security was sold by the Fund. If the underlying security goes down in price between the time the Fund sells the security and buys it back, the Fund will realize a gain on the transaction. Conversely, if the underlying security goes up in price during the period, the Fund will realize a loss on the transaction. Any such loss is increased by the amount of premium or interest the Fund must pay to the lender of the security. Likewise, any gain will be decreased by the amount of premium or interest the Fund must pay to the lender of the security. Because a short position loses value as the security’s price increases, the loss on a short sale is theoretically unlimited. Short sales involve leverage because the Fund borrows securities and then sells them, effectively leveraging its assets. The use of leverage may magnify gains or losses for the Fund.

Trading Risk. Shares of the Fund may trade above or below their net asset value (“NAV”). The trading price of the Fund’s shares may deviate significantly from their NAV during periods of market volatility. In addition, trading in shares of the Fund may be halted because of market conditions or for reasons that, in view of the NASDAQ Stock Market LLC (the “Exchange”), make trading in share inadvisable.

Bar Chart and Performance Table [Heading]

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FUND PERFORMANCE

Performance One Year or Less [Text]

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A comparison of the Fund’s performance with that of a broad measure of market performance may give some indication of the risks of an investment in the Fund; however, the Fund does not have performance history for a full calendar year.

Performance Past Does Not Indicate Future [Text]

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Of course, once the Fund has performance, this past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future.

Risk/Return:

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DISTRIBUTION (12b-1) FEES

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none

ACQUIRED FUND FEES AND EXPENSES

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0.03%

^[1]

Expense Example, with Redemption, 1 Year

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$ 110

Expense Example, with Redemption, 5 Years

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595