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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading SCHNEIDER SMALL CAP VALUE FUND
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Schneider Small Cap Value Fund (the "Fund") seeks long-term capital growth by investing primarily in common stocks of companies that have capitalizations that are less than the largest company in the Russell 2000® Index ("small cap companies") and which Schneider Capital Management Company (the "Adviser") believes are undervalued. There can be no guarantee that the Fund will achieve its investment objective.

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 and hold shares of the Fund.

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 that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2015-12-31
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 transactions 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, the Fund's portfolio turnover rate was 72.33% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 72.33%rr_PortfolioTurnoverRate
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 $200,000 in the Fund for the time periods indicated and then redeem 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 [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, at least 80% of the Fund's net assets (including borrowings for investment purposes) will be invested in small cap companies. As of November 30, 2014, the market capitalization range of the companies held by the Fund was $22 million to $7 billion. Please note that this range is as of a particular point in time and is subject to change. The Fund invests primarily in common stock of companies the Adviser believes are undervalued. The fund may invest in convertible securities without regard to their credit ratings. The Fund may also invest up to 20% of the value of its net assets in securities of foreign issuers, including American Depositary Receipts ("ADRs").

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

n  The Fund invests in common stocks which are subject to market, economic and business risks that will cause their prices to fluctuate over time. Therefore, the value of your investment in the Fund may go up and down, sometimes rapidly and unpredictably, and you could lose money. The value of securities convertible into equity securities, such as warrants or convertible debt, is also affected by prevailing interest rates, the credit quality of the issuer, and any call provision.


n  Stocks of small companies may be more volatile than, and not as readily marketable as, those of larger companies. Small companies may also have limited product lines, markets or financial resources and may be dependent on relatively small or inexperienced management groups. Additionally, the trading volume of small company securities may make them more difficult to sell than those of larger companies.


n  Value investing involves the risk that the Fund's investment in companies whose securities are believed to be undervalued, relative to their underlying profitability, will not appreciate in value as anticipated.


n  Investing in foreign securities poses additional market risks since political and economic events unique in a country or region will affect those markets and their issuers and may not affect the U.S. economy or U.S. issuers. In addition, investments in foreign securities are generally denominated in foreign currency. As a result, changes in the value of those currencies compared to the U.S. dollar may affect the value of the Fund's investments.

Risk Lose Money [Text] rr_RiskLoseMoney Therefore, the value of your investment in the Fund may go up and down, sometimes rapidly and unpredictably, and you could lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Risk/Return Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The chart below illustrates the long-term performance of the Fund. The information shows you how the Fund's performance has varied year by year and provides some indication of the risks of investing in the Fund. The chart assumes reinvestment of dividends and distributions. As with all such investments, past performance is not an indication of future results. Performance reflects fee waivers in effect. If fee waivers were not in place, the Fund's performance would be reduced. Updated performance information is available at www.schneidercap.com or by calling 1-888-520-3277.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The information shows you how the Fund's performance has varied year by year and provides some indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-888-520-3277
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.schneidercap.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture As with all such investments, past performance is not an indication of future results.
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 (for the periods reflected in the chart above):


Best Quarter: 39.11% (Qtr. ended June 30, 2009)

 

Worst Quarter: (31.03)% (Qtr. ended September 30, 2011)

 

Year-to-date total return for the nine months ended September 30, 2014: (11.35)%

 
Year to Date Return, Label rr_YearToDateReturnLabel Year-to-date total return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2014
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (11.35%)rr_BarChartYearToDateReturn
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 39.11%rr_BarChartHighestQuarterlyReturn
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (31.03%)rr_BarChartLowestQuarterlyReturn
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions of fees, expenses and taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are 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 an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRA").
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In cases in the chart above where the Fund's average annual return after taxes on distributions and sale of fund shares for a particular period is higher than the Fund's average annual return after taxes on distributions for the same period, this is due to realized losses that would have been sustained upon the sale of fund shares immediately after the relevant period. The calculations assume that an investor held the shares in a taxable account, was in the actual historical highest individual federal marginal income tax bracket for each year and would have been able to immediately utilize the full realized loss to reduce his or her federal tax liability.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The table below compares the Fund's average annual total returns for the past calendar year, past five calendar years, past ten calendar years and since inception to the average annual total returns of a broad-based securities market index for the same periods. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

In cases in the chart above where the Fund's average annual return after taxes on distributions and sale of fund shares for a particular period is higher than the Fund's average annual return after taxes on distributions for the same period, this is due to realized losses that would have been sustained upon the sale of fund shares immediately after the relevant period. The calculations assume that an investor held the shares in a taxable account, was in the actual historical highest individual federal marginal income tax bracket for each year and would have been able to immediately utilize the full realized loss to reduce his or her federal tax liability. However, actual individual tax results may vary and investors should consult their tax advisers regarding their personal tax situations.

Caption rr_AverageAnnualReturnCaption Average Annual Total Returns for the Periods Ended December 31, 2013
Russell 2000 Value Index (reflects no deductions of fees, expenses and taxes)
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 34.52%rr_AverageAnnualReturnYear01
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[1]
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 17.64%rr_AverageAnnualReturnYear05
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[1]
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.61%rr_AverageAnnualReturnYear10
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[1]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 10.41%rr_AverageAnnualReturnSinceInception
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[1]
SCHNEIDER SMALL CAP VALUE FUND
 
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum sales charge (load) imposed on reinvested dividends rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (1.75%)rr_RedemptionFeeOverRedemption
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Exchange fee (as a percentage of amount exchanged on shares held for less than one year, if applicable) rr_ExchangeFeeOverRedemption none
Management fees rr_ManagementFeesOverAssets 1.00%rr_ManagementFeesOverAssets
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Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Total other expenses rr_OtherExpensesOverAssets 0.52%rr_OtherExpensesOverAssets
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Total annual Fund operating expenses rr_ExpensesOverAssets 1.52%rr_ExpensesOverAssets
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Less Fee waivers and expense reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.37%)rr_FeeWaiverOrReimbursementOverAssets
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[2]
Net expenses rr_NetExpensesOverAssets 1.15%rr_NetExpensesOverAssets
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Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 117rr_ExpenseExampleYear01
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Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 444rr_ExpenseExampleYear03
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Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 794rr_ExpenseExampleYear05
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Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,781rr_ExpenseExampleYear10
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Annual Return 2004 rr_AnnualReturn2004 27.23%rr_AnnualReturn2004
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Annual Return 2005 rr_AnnualReturn2005 9.83%rr_AnnualReturn2005
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Annual Return 2006 rr_AnnualReturn2006 21.08%rr_AnnualReturn2006
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Annual Return 2007 rr_AnnualReturn2007 (17.08%)rr_AnnualReturn2007
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Annual Return 2008 rr_AnnualReturn2008 (46.53%)rr_AnnualReturn2008
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Annual Return 2009 rr_AnnualReturn2009 54.04%rr_AnnualReturn2009
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Annual Return 2010 rr_AnnualReturn2010 32.24%rr_AnnualReturn2010
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Annual Return 2011 rr_AnnualReturn2011 (23.99%)rr_AnnualReturn2011
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Annual Return 2012 rr_AnnualReturn2012 35.35%rr_AnnualReturn2012
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Annual Return 2013 rr_AnnualReturn2013 32.09%rr_AnnualReturn2013
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Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 32.09%rr_AverageAnnualReturnYear01
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Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 22.58%rr_AverageAnnualReturnYear05
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Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 7.58%rr_AverageAnnualReturnYear10
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Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 15.70%rr_AverageAnnualReturnSinceInception
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SCHNEIDER SMALL CAP VALUE FUND | After Taxes on Distributions
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 26.02%rr_AverageAnnualReturnYear01
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Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 21.39%rr_AverageAnnualReturnYear05
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Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.34%rr_AverageAnnualReturnYear10
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Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 12.92%rr_AverageAnnualReturnSinceInception
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SCHNEIDER SMALL CAP VALUE FUND | After Taxes on Distributions and Sale of Fund Shares
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 20.32%rr_AverageAnnualReturnYear01
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Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 18.21%rr_AverageAnnualReturnYear05
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Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 5.70%rr_AverageAnnualReturnYear10
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Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 12.56%rr_AverageAnnualReturnSinceInception
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[1] After-tax returns are 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 an investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRA").
[2] The Adviser has contractually agreed to waive management fees and reimburse expenses to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 1.15%. In determining the Adviser's obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 1.15%: acquired fund fees and expenses, brokerage commissions, extraordinary items, interest and taxes. This contractual limitation is in effect until December 31, 2015 and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc.