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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Aug. 31, 2019
Entity Registrant Name dei_EntityRegistrantName RBB FUND, INC.
Entity Central Index Key dei_EntityCentralIndexKey 0000831114
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Feb. 28, 2020
Document Effective Date dei_DocumentEffectiveDate Feb. 28, 2020
Prospectus Date rr_ProspectusDate Feb. 28, 2020
Orinda | Orinda Income Opportunities Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading SUMMARY SECTION — ORINDA INCOME OPPORTUNITIES FUND
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Orinda Income Opportunities Fund (the “Fund”) seeks to maximize current income with potential for modest growth of capital.

Expense [Heading] rr_ExpenseHeading Expenses and Fees
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund’s Class A shares. More information about these and other discounts is available from your financial professional and in the “Distribution of Fund Shares” section of the Fund’s Prospectus and the “Other Information Regarding Maximum Sales Charge, Purchases and Redemptions” section of the Fund’s Statement of Additional Information (“SAI”). Each financial intermediary may impose different sales charges and these variations are described in Appendix A of the Fund’s Prospectus.

 

Additionally, you may be required to pay commissions and/or other forms of compensation to a broker for transactions in Class I Shares of the Fund, which are not reflected in the tables or the examples below.

Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in total annual Fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year ended August 31, 2019, the Fund’s portfolio turnover rate was 131% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 131.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund's Class A shares.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. Additionally, you may be required to pay commissions and/or other forms of compensation to a broker for transactions in Class I Shares of the Fund, which are not reflected in the tables or the examples below.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the "Financial Highlights" section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $100,000 in Class I Shares of the Fund and $10,000 in Class A and Class D Shares of the Fund (the minimum initial investment for Class A and Class D Shares is $5,000) for the time periods indicated and that you sell your shares at the end of those periods. The Example also assumes that each year your investment has a 5% return and Fund operating expenses remain the same. Although your actual costs and returns might be different, your approximate costs of investing in the Fund would be:

Strategy [Heading] rr_StrategyHeading Summary of Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund will attempt to achieve its investment objective by investing in U.S. and non-U.S. securities and investment instruments including, but not limited to, equity securities, debt securities, and derivatives. The Fund’s allocation to these various security types and asset classes will vary over time in response to changing market opportunities with the goal of maximizing current income.

 

The Fund may invest without limit in equity securities of issuers of any market capitalization. The types of equity securities in which the Fund will generally invest include common stocks, preferred stocks, real estate investment trusts (“REITs”), master limited partnerships (“MLPs”), rights, warrants, depositary receipts and other investment companies, including exchange-traded funds (“ETFs”). The Fund’s equity investments may also take the form of depositary receipts including American Depositary Receipts (“ADRs”), European Depositary Receipts (“EDRs”) and Global Depositary Receipts (“GDRs”). The Fund generally invests in dividend paying stocks. The Fund may invest up to 25% of its net assets in initial public offerings (“IPOs”). The Fund may also invest without limit in foreign securities, including up to 50% of its net assets in securities of issuers located in emerging markets.

 

The Fund will generally invest at least 50% of its net assets in REITs. As a result of its investments in REITs, the Fund will be concentrated in the real estate industry. The Fund may invest in “Rule 144A” securities, which are privately placed, restricted securities that may only be resold under certain circumstances to other qualified institutional buyers.

 

The Fund may invest without limit in debt securities, provided that no more than 30% of its net assets are invested in debt securities rated below investment grade (known as “junk bonds”). The types of debt securities in which the Fund may invest generally include instruments and obligations of U.S. and non-U.S. corporate and other non-governmental entities, those of U.S. and non-U.S. governmental entities, mortgage-related or mortgage-backed securities (including “sub-prime” mortgages), asset-backed securities, exchange-traded notes (“ETNs”), floating rate loans, convertible securities, inflation-linked debt securities and subordinated debt securities. The Fund invests in debt securities with a broad range of maturities and the Fund’s investments may have fixed or variable principal payments.

 

The Fund may invest up to 85% of its net assets in derivatives, including options, futures (such as bond, index, interest rate and currency futures, but excluding commodities futures) and swaps (such as credit-default swaps, interest rate swaps and total return swaps). These derivative instruments may be used for investment purposes, to modify or hedge the Fund’s exposure to a particular investment market related risk, to manage the volatility of the Fund, to hedge against adverse changes in the market price of securities, interest rates or currency exchange rates and as a substitute for purchasing or selling securities.

 

The Fund may utilize leverage (by borrowing against a line of credit for investment purposes) up to one-third of the value of its assets as part of the portfolio management process. The Fund may also sell securities short with respect to 100% of its net assets and may lend its portfolio securities to generate additional income. A short sale is the sale by the Fund of a security that it does not own in anticipation of purchasing the same security in the future at a lower price to close the short position.

 

The Fund will sell (or close a position in) a security when Orinda Asset Management LLC (the “Adviser”) determines that a particular security has achieved its investment expectations or the reasons for maintaining that position are no longer valid. It is expected that the Fund will have a portfolio turnover in excess of 100% on an annual basis. The Fund’s investment strategies may periodically result in a significant portion of its assets being invested in the securities of companies in the same sector of the market.

 

The Adviser may also invest up to 100% of the Fund’s total assets in cash, money-market instruments, bank obligations and other high-quality debt securities for temporary defensive purposes.

Risk [Heading] rr_RiskHeading Summary of Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

Losing all or a portion of your investment is a risk of investing in the Fund. The value of your investment in the Fund, as well as the amount of return you receive on your investment, may fluctuate significantly from day to day and over time. The Fund’s principal risks are presented in alphabetical order to facilitate finding particular risks and comparing them with other funds. Each risk summarized below is considered a “principal risk” of investing in the Fund, regardless of the order in which it appears. Different risks may be more significant at different times depending on market conditions or other factors.

 

●

Convertible Bond Risk. Convertible bonds are hybrid securities that have characteristics of both bonds and common stocks and are therefore subject to both debt security risks and equity risk. Convertible bonds are subject to equity risk especially when their conversion value is greater than the interest and principal value of the bond. The prices of equity securities may rise or fall because of economic or political changes and may decline over short or extended periods of time.

 

●

Credit Risk. The issuers of the bonds and other debt securities held by the Fund may not be able to make interest or principal payments. The degree of credit risk depends on the issuer’s financial condition and on the terms of the securities.

 

●

Currency Risk. Changes in foreign currency exchange rates will affect the value of what the Fund owns and the Fund’s share price. Generally, when the U.S. dollar rises in value against a foreign currency, an investment in that country loses value because that currency is worth fewer U.S. dollars. Devaluation of a currency by a country’s government or banking authority also will have a significant impact on the value of any investments denominated in that currency. Currency markets generally are not as regulated as securities markets.

 

●

Cyber Security Risk. Cyber security risk is the risk of an unauthorized breach and access to Fund assets, Fund or customer data (including private shareholder information), or proprietary information, or the risk of an incident occurring that causes the Fund, the investment adviser, custodian, transfer agent, distributor and other service providers and financial intermediaries to suffer data breaches, data corruption or lose operational functionality or prevent Fund investors from purchasing, redeeming or exchanging shares or receiving distributions. The Fund and its investment adviser have limited ability to prevent or mitigate cyber security incidents affecting third-party service providers. Successful cyber-attacks or other cyber-failures or events affecting the Fund or its service providers may adversely impact and cause financial losses to the Fund or its shareholders.

 

●

Depositary Receipt Risk. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by the issuer of the underlying security and a depositary, whereas a depositary may establish an unsponsored facility without participation by the issuer of the depositary security. Holders of unsponsored depositary receipts generally bear all the costs of such facilities and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts of the deposited securities. In addition, investment in ADRs, EDRs and GDRs may be less liquid than the underlying shares in their primary trading market.

 

●

Derivatives Risk. The Fund’s use of derivatives (which may include options, futures and swaps, among others) may reduce the Fund’s returns and/or increase volatility. Derivatives involve the risk of improper valuation, the risk of ambiguous documentation, and the risk that changes in the value of the derivative may not correlate perfectly with the underlying security. Derivatives are also subject to market risk, interest rate risk, credit risk, counterparty risk and liquidity risk. Derivatives 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.

 

●

Exchange-Traded Fund and Mutual Fund Risk. When the Fund invests in an ETF or mutual fund, it will bear additional expenses based on its pro rata share of the ETFs or mutual fund’s operating expenses, including the potential duplication of management fees. The risk of owning an ETF or mutual fund generally reflects the risks of owning the underlying securities the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs. Index ETFs may not track their underlying indices.

 

●

Exchange-Traded Note Risk. 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 the underlying securities’ 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. In addition, the notes issued by ETNs and held by the Fund are unsecured debt of the issuer.

 

●

Fixed Income Securities Risk. Fixed income securities are subject to interest rate risk and credit risk. There is also the risk that an issuer may “call,” or repay, its high yielding bonds before their maturity dates.

 

●

Foreign and Emerging Market Securities Risk. Foreign investments may carry risks associated with investing outside the United States, such as currency fluctuation, economic or financial instability, lack of timely or reliable financial information or unfavorable political or legal developments. Those risks are increased for investments in emerging markets.

 

●

Futures Risk. The value of a futures contract tends to increase and decrease in correlation with the value of the underlying instrument. Risks of futures contracts may arise from an imperfect correlation between movements in the price of the futures and the price of the underlying instrument. The Fund’s use of futures contracts (and related options) exposes the Fund to leverage risk because of the small margin requirements relative to the value of the futures contract. While futures contracts are generally liquid instruments, under certain market conditions they may become illiquid. The price of futures can be highly volatile; using them could lower total return, and the potential loss from futures could exceed the Fund’s initial investment in such contracts.

 

●

Government-Sponsored Entities Risk. Securities issued by government-sponsored entities may not be backed by the full faith and credit of the United States.

 

●

High-Yield Securities Risk. Fixed income securities that are rated below investment grade (i.e., “junk bonds”) are subject to additional risk factors due to the speculative nature of these securities, such as increased possibility of default liquidation of the security, and changes in value based on public perception of the issuer.

 

●

Initial Public Offering Risk. The market value of IPO shares may fluctuate considerably due to factors such as the absence of a prior public market, unseasoned trading, the small number of shares available for trading and limited information about the issuer. The purchase of IPO shares may involve high transaction costs. IPO shares are subject to market risk and liquidity risk.

 

●

Interest Rate Risk. The market value of fixed income securities changes in response to interest rate changes and other factors. Generally, prices of fixed income securities will increase as interest rates fall and will decrease as interest rates rise. It is likely there will be less governmental action in the near future to maintain low interest rates. The negative impact on fixed income securities from the resulting rate increases for that and other reasons could be swift and significant.

 

●

Large Companies Risk. The securities of large capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain or maintain high growth rates during periods of economic expansion.

 

●

Leverage and Short Sales Risk. Leverage is the practice of borrowing money to purchase securities. If the securities decrease in value, the Fund will suffer a greater loss than would have resulted without the use of leverage. A short sale will be successful if the price of the shorted security decreases, however, if the underlying security goes up in price during the period in which the short position is outstanding, the Fund will realize a loss. The risk on a short sale is unlimited because the Fund must buy the shorted security at the higher price to complete the transaction. Therefore, short sales may be subject to greater risks than investments in long positions.

 

●

Management Risk. The skill of the Adviser will play a significant role in the Fund’s ability to achieve its investment objective. The Fund’s ability to achieve its investment objective depends on the investment skill and ability of the Adviser and on its ability to correctly identify economic trends.

 

●

Market Risk. The value of the Fund’s shares will fluctuate as a result of the movement of the overall stock market or the value of the individual securities held by the Fund, and you could lose money.

 

●

Master Limited Partnership Risk. Investments in securities (units) of MLPs involve risks that differ from an investment in common stock. To the extent that an MLP’s interests are all in a particular industry, the MLP will be negatively impacted by economic events adversely impacting that industry. Additionally, holders of the units of MLPs have more limited control and limited rights to vote on matters affecting the partnership. There are also certain tax risks associated with an investment in units of MLPs.

 

●

Mortgage-Related and Other Asset-Backed Securities Risk. Generally, rising interest rates tend to extend the duration of fixed rate mortgage-related securities, making them more sensitive to changes in interest rates. As a result, in a period of rising interest rates, if the Fund holds mortgage-related securities, it may exhibit additional volatility. This is known as extension risk. In addition, adjustable and fixed rate mortgage-related securities are subject to prepayment risk. When interest rates decline, borrowers may pay off their mortgages sooner than expected. This can reduce the returns of the Fund because it may have to reinvest that money at the lower prevailing interest rates. The risk of default is generally higher in mortgage-related investments that include sub-prime mortgages. Asset-backed securities are subject to risks similar to those associated with mortgage-related securities.

 

●

Options Risk. Purchasing and writing put and call options are highly specialized activities and entail greater than ordinary investment risks. The Fund may not fully benefit from or may lose money on an option if changes in its value do not correspond as anticipated to changes in the value of the underlying securities.

 

●

Portfolio Turnover Risk. A high portfolio turnover rate (100% or more on an annualized basis) increases the Fund’s transaction costs (including brokerage commissions and dealer costs), which adversely impacts the Fund’s performance. Higher portfolio turnover may result in the realization of more short-term capital gains than if the Fund had lower portfolio turnover.

 

●

Preferred Stock Risk. Preferred stocks may be more volatile than fixed income securities and are more correlated with the issuer’s underlying common stock than fixed income securities. Additionally, the dividend on a preferred stock may be changed or omitted by the issuer.

 

●

Real Estate and REIT Concentration Risk. The Fund is vulnerable to the risks of the real estate industry, such as the risk that a decline in rental income may occur because of extended vacancies, the failure to collect rents, increased competition from other properties, or poor management. The value and performance of REITs depends on how well the underlying properties owned by the REIT are managed. In addition, the value of an individual REIT’s securities can decline if the REIT fails to continue qualifying for special tax treatment. Investments in REITs may involve duplication of management fees and other expenses.

 

●

Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these bonds.

 

●

Sector Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies in the same sector of the market, the Fund is more susceptible to economic, political, regulatory and other occurrences influencing those sectors.

 

●

Small and Medium Companies Risk. Investing in securities of small and medium capitalization companies may involve greater volatility than investing in larger and more established companies because small and medium capitalization companies can be subject to more abrupt or erratic share price changes than larger, more established companies.

 

●

Swaps Risk. In a swap transaction, one party agrees to pay the other party an amount equal to the return, based upon an agreed-upon notional value, of a defined underlying asset or a non-asset reference (such as an index) during a specified period of time. In return, the other party would make periodic payments based on a fixed or variable interest rate or on the return from a different underlying asset or non-asset reference based upon an agreed-upon notional value. Swaps could result in losses if the underlying asset or reference does not perform as anticipated. The value of swaps, like many other derivatives, may move in unexpected ways and may result in losses for the Fund. Such transactions can have the potential for unlimited losses.

Risk Lose Money [Text] rr_RiskLoseMoney Losing all or a portion of your investment is a risk of investing in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The Fund was reorganized following the close of business on April 28, 2017, to acquire the assets and liabilities of the Orinda Income Opportunities Fund, a series of Advisors Series Trust (the “Predecessor Fund”), in exchange for shares of the Fund. Accordingly, the Fund is the successor to the Predecessor Fund, and the following performance information shown prior to May 1, 2017, is that of the Predecessor Fund. The Fund has an investment objective, strategies and policies substantially similar to the Predecessor Fund, which was also advised by the Adviser.

 

The following information provides some indication of the risks of investing in the Fund. The bar chart shows changes in the Class I performance from year to year. The table shows how the Fund’s average annual returns for 1-year, 5-year and since inception periods compare with those of broad measures of market performance. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at www.orindafunds.com or by calling the Fund toll-free at 1-855-467-4632 (855-4ORINDA).

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The table shows how the Fund's average annual returns for 1-year, 5-year and since inception periods compare with those of broad measures of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-855-467-4632 (855-4ORINDA)
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.orindafunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Total Returns for the Calendar Years Ended December 31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Best and Worst Quarterly Performance of the Fund (for the periods reflected in the chart above):

 

Best Quarter:

13.63% (quarter ended March 31, 2019)

Worst Quarter:

-9.55% (quarter ended December 31, 2018)

Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (For the periods ended December 31, 2019)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns were calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on your tax situation and may differ from those shown and after-tax returns shown are not relevant to those who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts ("IRAs").
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Class I; after-tax returns for Class A and Class D will vary, to the extent each class has different expenses.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In certain cases, the figure representing "Return After Taxes on Distributions and Sale of Fund Shares" may be higher than the other return figures for the same period, since a higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The table below compares the average annual total returns for the Fund before taxes for the past calendar year, the past five calendar years, and since inception periods to the average annual total returns of a broad-based securities market index for the same periods.

Orinda | Orinda Income Opportunities Fund | Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 8.72%
5 Years rr_AverageAnnualReturnYear05 3.05%
Since Inception rr_AverageAnnualReturnSinceInception 3.32% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 28, 2013
Orinda | Orinda Income Opportunities Fund | Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 8.72%
5 Years rr_AverageAnnualReturnYear05 3.05%
Since Inception rr_AverageAnnualReturnSinceInception 3.35% [2]
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2013
Orinda | Orinda Income Opportunities Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol OIOIX
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.29%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.12% [3]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.91% [3]
One Year rr_ExpenseExampleYear01 $ 1,940
Three Years rr_ExpenseExampleYear03 6,000
Five Years rr_ExpenseExampleYear05 10,316
Ten Years rr_ExpenseExampleYear10 $ 22,327
Annual Return 2014 rr_AnnualReturn2014 6.75%
Annual Return 2015 rr_AnnualReturn2015 (2.90%)
Annual Return 2016 rr_AnnualReturn2016 9.51%
Annual Return 2017 rr_AnnualReturn2017 6.79%
Annual Return 2018 rr_AnnualReturn2018 (8.32%)
Annual Return 2019 rr_AnnualReturn2019 20.95%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.63%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (9.55%)
1 Year rr_AverageAnnualReturnYear01 20.95%
5 Years rr_AverageAnnualReturnYear05 4.72%
Since Inception rr_AverageAnnualReturnSinceInception 4.78% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 28, 2013
Orinda | Orinda Income Opportunities Fund | Class I | After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 19.19% [4]
5 Years rr_AverageAnnualReturnYear05 2.82% [4]
Since Inception rr_AverageAnnualReturnSinceInception 2.83% [1],[4]
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 28, 2013 [4]
Orinda | Orinda Income Opportunities Fund | Class I | After Taxes on Distributions and Sales  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 12.79% [5]
5 Years rr_AverageAnnualReturnYear05 2.96% [5]
Since Inception rr_AverageAnnualReturnSinceInception 2.97% [1],[5]
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 28, 2013 [5]
Orinda | Orinda Income Opportunities Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol OIOAX
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.33%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.12% [3]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.16% [3]
One Year rr_ExpenseExampleYear01 $ 708
Three Years rr_ExpenseExampleYear03 1,142
Five Years rr_ExpenseExampleYear05 1,601
Ten Years rr_ExpenseExampleYear10 $ 2,868
1 Year rr_AverageAnnualReturnYear01 14.59%
5 Years rr_AverageAnnualReturnYear05 3.34%
Since Inception rr_AverageAnnualReturnSinceInception 3.64% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Jun. 28, 2013
Orinda | Orinda Income Opportunities Fund | Class D  
Prospectus [Line Items] rr_ProspectusLineItems  
Trading Symbol dei_TradingSymbol OIODX
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 1.00%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.28%
Acquired fund fees and expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.12% [3]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.92% [3]
One Year rr_ExpenseExampleYear01 $ 295
Three Years rr_ExpenseExampleYear03 904
Five Years rr_ExpenseExampleYear05 1,538
Ten Years rr_ExpenseExampleYear10 $ 3,242
1 Year rr_AverageAnnualReturnYear01 19.71%
5 Years rr_AverageAnnualReturnYear05 3.71%
Since Inception rr_AverageAnnualReturnSinceInception 3.92% [2]
Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2013
[1] The Predecessor Fund's Class I and Class A shares commenced operations on June 28, 2013.
[2] The Predecessor Fund's Class D shares commenced operations on September 27, 2013.
[3] Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the "Financial Highlights" section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.
[4] After-tax returns were calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown and after-tax returns shown are not relevant to those who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts ("IRAs"). After-tax returns are shown only for Class I; after-tax returns for Class A and Class D will vary, to the extent each class has different expenses.
[5] In certain cases, the figure representing "Return After Taxes on Distributions and Sale of Fund Shares" may be higher than the other return figures for the same period, since a higher after-tax return results when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.