Risk/Return: Document Type Document Period End Date Registrant Name Central Index Key Amendment Flag Document Creation Date Document Effective Date Prospectus Date James advantage funds [Abstract] Prospectus: Risk/Return [Heading] Objective [Heading] Objective, Primary [Text Block] Expense [Heading] Expense Narrative [Text Block] Shareholder Fees Caption [Text] Shareholder Fees [Table] Operating Expenses Caption [Text] Annual Fund Operating Expenses [Table] Expense Example [Heading] Expense Example Narrative [Text Block] Expense Example, With Redemption [Table] Portfolio Turnover [Heading] Portfolio Turnover [Text Block] Strategy [Heading] Strategy Narrative [Text Block] Risk [Heading] Risk Narrative [Text Block] Bar Chart and Performance Table [Heading] Performance Narrative [Text Block] Bar Chart [Heading] Bar Chart [Table] Bar Chart Closing [Text Block] Performance Table Heading Performance [Table] Performance Table Narrative Shareholder Fees: Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee (for redemptions within 180 days of purchase) Operating Expenses: Management Fee Distribution (12b-1) Fees Dividend Expenses on Short Sales Remainder of Other Expenses Other Expenses Other Expenses (as a percentage of Assets): Other Expenses Total Other Expenses Total Other Expenses Acquired Fund Fees and Expenses Expenses (as a percentage of Assets) Total Annual Fund Operating Expenses Total Annual Fund Operating Expenses Expense Example: Expense Example, with Redemption, 1 Year 1 Year Expense Example, with Redemption, 3 Years 3 Years Expense Example, with Redemption, 5 Years 5 Years Expense Example, with Redemption, 10 Years 10 Years Bar Chart Table: Annual Return 2001 Annual Return 2002 Annual Return 2003 Annual Return 2004 Annual Return 2005 Annual Return 2006 Annual Return 2007 Annual Return 2008 Annual Return 2009 Annual Return 2010 Average Annual Return: One Year Five Years Ten Years Since Inception Inception Date Portfolio Turnover, Rate Other Expenses, New Fund, Based on Estimates [Text] Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Risk Lose Money [Text] Risk Nondiversified Status [Text] Risk Not Insured Depository Institution [Text] Performance Information Illustrates Variability of Returns [Text] Performance One Year or Less [Text] Performance Availability Phone [Text] Performance Availability Website Address [Text] Performance Past Does Not Indicate Future [Text] Year to Date Return, Label Bar Chart, Year to Date Return, Date Bar Chart, Year to Date Return Highest Quarterly Return, Label Label Highest Quarterly Return, Date Highest Quarterly Return Lowest Quarterly Return, Label Label Lowest Quarterly Return, Date Lowest Quarterly Return Performance Table Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred Performance Table Explanation after Tax Higher Performance Measure [Axis] Return after Taxes on Distributions Return after Taxes on Distributions and Sale of Fund Shares Document [Axis] Prospectus Institutional Class Shares [Member] Institutional Class Shares Member Institutional Class Shares Series [Axis] Series S000003560 Member James Balanced: Golden Rainbow Fund Share Class [Axis] Share Classes James Balanced: Golden Rainbow Fund Class Parent C000009900 Member Retail Class C000075008 Member Institutional Class Before Taxes Russell2000 Member Russell 2000 Index (reflects no deduction for fees, expenses or taxes) S P400 Midcap Member S&P Mid Cap 400 Index (reflects no deduction for fees, expenses or taxes) S P500 Member S&P 500 Index (reflects no deduction for fees, expenses or taxes) Blended (25% S&P 500 Index; 25% Russell 2000 Index; 50% Barclays Intermediate Government/Credit Bond Index) [Member] Blended25 S P500 Index25 Russell2000 Index50 Barclays Intermediate Government Credit Bond Index Member Blended (25% S&P 500 Index; 25% Russell 2000 Index; 50% Barclays Intermediate Government/Credit Bond Index) (reflects no deduction for fees, expenses or taxes) Retail Class Shares [Member] Retail Class Shares Member Retail Class Shares S000029269 Member James Micro Cap Fund JAMES MICRO CAP FUND Class Parent C000090023 Member James Micro Cap Fund S000003563 Member James Small Cap Fund James Small Cap Fund Class Parent C000009903 Member James Small Cap Fund S000012708 Member James Mid Cap Fund James Mid Cap Fund Class Parent C000034244 Member James Mid Cap Fund S000025221 Member James Long-Short Fund James Long-Short Fund Class Parent C000075177 Member James Long-Short Fund