v3.26.3
Performance Management
Oct. 28, 2026
James Small Cap Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The bar chart and performance table below illustrate the variability of the Fund’s returns, which provides some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual total returns over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy. Of course, the Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at no cost by visiting www.jamesinvestment.com or by calling 1-800-99-JAMES (1-800-995-2637).

 

Performance Past Does Not Indicate Future [Text] Of course, the Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart and performance table below illustrate the variability of the Fund’s returns, which provides some indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the Fund’s average annual total returns over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy.
Bar Chart [Heading] Annual Total Returns (Years ended December 31):
Bar Chart [Table]

(BAR CHAT)

 

Bar Chart Closing [Text Block]
Best Quarter 4th Quarter 2020 26.12%
Worst Quarter 1st Quarter 2020 -35.01%
     

The Fund’s year-to-date return as of September 30, 2026 was 12.92%.

Year to Date Return, Label [Optional Text] The Fund’s year-to-date return
Bar Chart, Year to Date Return 12.92%
Bar Chart, Year to Date Return, Date Sep. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 26.12%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (35.01%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns (for the period ended December 31, 2025)
Performance Table Market Index Changed Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index.
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts.
Performance [Table]
  One Year Five Years Ten Years
James Small Cap Fund Return Before Taxes 12.65% 15.36% 8.29%
Return After Taxes on Distributions 11.78% 14.48% 7.02%
Return After Taxes on Distributions and Sale of Fund Shares 8.12% 12.27% 6.33%
Bloomberg US 3000 Total Return Index*
(reflects no deduction for fees, expenses or taxes)
17.21% 13.09% 14.27%
VettaFi US Equity 3000 Index
(reflects no deduction for fees, expenses or taxes)
17.16% 13.01% 14.25%
Bloomberg US 2000 Total Return Index**
(reflects no deduction for fees, expenses or taxes)
11.06% 6.65% 10.00%

 

*Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index. The Fund changed its broad-based securities market index because the Adviser believes the new broad-based securities market index represents a better comparison against which to measure the Fund’s performance.

 

**Additional index.

 

Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses or taxes
Performance Table Closing [Text Block]

After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts.

Performance Availability Website Address [Text] www.jamesinvestment.com
Performance Availability Phone [Text] 1-800-99-JAMES (1-800-995-2637)
JAMES MICRO CAP FUND  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The bar chart and performance table below illustrate the variability of the returns of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Fund from year to year and by showing how the average annual total returns of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy. Of course, the past performance of the Fund is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at no cost by visiting www.jamesinvestment.com or by calling 1-800-99-JAMES (1-800-995-2637).

 

Performance Past Does Not Indicate Future [Text] Of course, the past performance of the Fund is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart and performance table below illustrate the variability of the returns of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Fund from year to year and by showing how the average annual total returns of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy.
Bar Chart [Heading] Annual Total Returns (Years ended December 31):
Bar Chart [Table]

(BAR GRAPH)

 

Bar Chart Closing [Text Block]
Best Quarter 4th Quarter 2020 22.92%
Worst Quarter 1st Quarter 2020 -37.18%

 

The Fund’s year-to-date return as of September 30, 2026 was 12.21%.

Year to Date Return, Label [Optional Text] The Fund’s year-to-date return
Bar Chart, Year to Date Return 12.21%
Bar Chart, Year to Date Return, Date Sep. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 22.92%
Highest Quarterly Return, Date Dec. 31, 2020
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (37.18%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns (for the period ended December 31, 2025)
Performance Table Market Index Changed Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index.
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts.
Performance [Table]
  One Year Five Years Ten Years
James Micro Cap Fund Return Before Taxes 4.37% 10.42% 7.41%
Return After Taxes on Distributions 4.12% 9.63% 6.59%
Return After Taxes on Distributions and Sale of Fund Shares 2.76% 8.15% 5.80%
Bloomberg US 3000 Total Return Index*
(reflects no deduction for fees, expenses or taxes)
17.21% 13.09% 14.27%
VettaFi US Equity 3000 Index
(reflects no deduction for fees, expenses or taxes)
17.16% 13.01% 14.25%
Bloomberg US Micro-Cap Total Return Index**
(reflects no deduction for fees, expenses or taxes)
12.72% 3.39% 8.41%

 

*Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index. The Fund changed its broad-based securities market index because the Adviser believes the new broad-based securities market index represents a better comparison against which to measure the Fund’s performance.

 

**Additional index.

 

Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses or taxes
Performance Table Closing [Text Block]

After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts.

Performance Availability Website Address [Text] www.jamesinvestment.com
Performance Availability Phone [Text] 1-800-99-JAMES (1-800-995-2637)
James Aggressive Allocation Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The bar chart and performance table below illustrate the variability of the returns of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Fund from year to year and by showing how the average annual total returns of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy. Of course, the past performance of the Fund is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at no cost by visiting www.jamesinvestment.com or by calling 1-800-99-JAMES (1-800-995-2637).

Performance Past Does Not Indicate Future [Text] Of course, the past performance of the Fund is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart and performance table below illustrate the variability of the returns of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Fund from year to year and by showing how the average annual total returns of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy.
Bar Chart [Heading] Annual Total Returns (Years ended December 31):
Bar Chart [Table]

(BAR GRAPH)

 

Bar Chart Closing [Text Block]
Best Quarter 1st Quarter 2024  9.88%  
Worst Quarter 1st Quarter 2020 -20.42%  

 

The Fund’s year-to-date return as of September 30, 2026 was 9.09%.

 

Year to Date Return, Label [Optional Text] The Fund’s year-to-date return
Bar Chart, Year to Date Return 9.09%
Bar Chart, Year to Date Return, Date Sep. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 9.88%
Highest Quarterly Return, Date Mar. 31, 2024
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (20.42%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns (for the period ended December 31, 2025)
Performance Table Market Index Changed Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index.
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts.
Performance [Table]
  One Year Five Years  Ten Years
James Aggressive Allocation Fund Return Before Taxes 15.92% 10.15% 6.76%
Return After Taxes on Distributions 15.77% 10.00% 6.57%
Return After Taxes on Distributions and Sale of Fund Shares 9.53% 8.03% 5.42%
Bloomberg US 3000 Total Return Index*
(reflects no deduction for fees, expenses or taxes)
17.21% 13.09% 14.27%
VettaFi US Equity 3000 Index
(reflects no deduction for fees, expenses or taxes)
17.16% 13.01% 14.25%
65% Bloomberg US 3000 Total Return Index, 35% Bloomberg U.S. Government/Credit Bond Index**
(reflects no deduction for fees, expenses or taxes)
13.67% 8.30% 10.15%

 

*Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index. The Fund changed its broad-based securities market index because the Adviser believes the new broad-based securities market index represents a better comparison against which to measure the Fund’s performance.

 

**Additional index.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses or taxes
Performance Table Closing [Text Block]

After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts.

Performance Availability Website Address [Text] www.jamesinvestment.com
Performance Availability Phone [Text] 1-800-99-JAMES (1-800-995-2637)
Retail Class [Member] | James Balanced: Golden Rainbow Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The bar chart and performance table below illustrate the variability of the returns of the Retail Class shares of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Retail Class shares of the Fund from year to year and by showing how the average annual total returns of the Retail Class shares of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy. Of course, the past performance of the Retail Class shares of the Fund is not necessarily an indication of how the Retail Class shares of the Fund will perform in the future. Updated performance information is available at no cost by visiting www.jamesinvestment.com or by calling 1-800-99-JAMES (1-800-995-2637).

 

Performance Past Does Not Indicate Future [Text] Of course, the past performance of the Retail Class shares of the Fund is not necessarily an indication of how the Retail Class shares of the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart and performance table below illustrate the variability of the returns of the Retail Class shares of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Retail Class shares of the Fund from year to year and by showing how the average annual total returns of the Retail Class shares of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy.
Bar Chart [Heading] Annual Total Returns (Retail Class Shares) (Years ended December 31):
Bar Chart [Table]

(BAR CHAT)

 

Bar Chart Closing [Text Block]
Best Quarter 4th Quarter 2023 7.16%
Worst Quarter 1st Quarter 2020 -9.98%
     

The Fund’s Retail Class year-to-date return as of September 30, 2026 was 3.46%.

 

Year to Date Return, Label [Optional Text] The Fund’s Retail Class year-to-date return
Bar Chart, Year to Date Return 3.46%
Bar Chart, Year to Date Return, Date Sep. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 7.16%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (9.98%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns (Retail Class Shares) (for the period ended December 31, 2025)
Performance Table Market Index Changed Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index.
Performance Table Uses Highest Federal Rate Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts (“IRA”).
Performance [Table]
  One Year Five Years Ten Years
James Balanced: Golden Rainbow Fund – Retail Class Return Before Taxes 13.17% 6.85% 4.59%
Return After Taxes on Distributions 11.71% 5.67% 3.43%
Return After Taxes on Distributions and Sale of Fund Shares 8.55% 5.14% 3.36%
Bloomberg US 3000 Total Return Index*
(reflects no deduction for fees, expenses or taxes)
17.21% 13.09% 14.27%
VettaFi US Equity 3000 Index
(reflects no deduction for fees, expenses or taxes)
17.16% 13.01% 14.25%
Blended Index (25% Bloomberg US 1000 Total Return Index, 25% Bloomberg US 2000 Total Return Index, 50% Bloomberg Intermediate U.S. Government/Credit Bond Index)**
(reflects no deduction for fees, expenses or taxes)
10.81% 5.78% 7.64%

 

*Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index. The Fund changed its broad-based securities market index because the Adviser believes the new broad-based securities market index represents a better comparison against which to measure the Fund’s performance.

 

**Additional index.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses or taxes
Performance Table Closing [Text Block]

After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts (“IRA”).

Performance Availability Website Address [Text] www.jamesinvestment.com
Performance Availability Phone [Text] 1-800-99-JAMES (1-800-995-2637)
Institutional Class [Member] | James Balanced: Golden Rainbow Fund  
Prospectus [Line Items]  
Bar Chart and Performance Table [Heading] Performance
Performance Narrative [Text Block]

The bar chart and performance table below illustrate the variability of the returns of the Institutional Class shares of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Institutional Class shares of the Fund from year to year and by showing how the average annual total returns of the Institutional Class shares of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy. Of course, the past performance of the Institutional Class shares of the Fund is not necessarily an indication of how the Institutional Class shares of the Fund will perform in the future. Updated performance information is available at no cost by visiting www.jamesinvestment.com or by calling 1-800-99-JAMES (1-800-995-2637).

Performance Past Does Not Indicate Future [Text] Of course, the past performance of the Institutional Class shares of the Fund is not necessarily an indication of how the Institutional Class shares of the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] The bar chart and performance table below illustrate the variability of the returns of the Institutional Class shares of the Fund, which provides some indication of the risks of investing in the Fund by showing changes in the performance of the Institutional Class shares of the Fund from year to year and by showing how the average annual total returns of the Institutional Class shares of the Fund over time compare with the returns of a broad-based securities market index and an additional index that is more representative of the Fund’s strategy.
Bar Chart [Heading] Annual Total Returns (Institutional Class Shares) (Years ended December 31):
Bar Chart [Table]

(BAR GRAPH)

 

Bar Chart Closing [Text Block]
Best Quarter 4th Quarter 2023 7.25%
Worst Quarter 1st Quarter 2020 -9.90%

 

The Fund’s Institutional Class year-to-date return as of September 30, 2026 was 3.60%.

 

Year to Date Return, Label [Optional Text] The Fund’s Institutional Class year-to-date return
Bar Chart, Year to Date Return 3.60%
Bar Chart, Year to Date Return, Date Sep. 30, 2026
Highest Quarterly Return, Label [Optional Text] Best Quarter
Highest Quarterly Return 7.25%
Highest Quarterly Return, Date Dec. 31, 2023
Lowest Quarterly Return, Label [Optional Text] Worst Quarter
Lowest Quarterly Return (9.90%)
Lowest Quarterly Return, Date Mar. 31, 2020
Performance Table Heading Average Annual Total Returns (Institutional Class Shares) (for the period ended December 31, 2025)
Performance Table Market Index Changed Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index.
Performance Table Uses Highest Federal Rate After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts (“IRA”).
Performance [Table]
  One Year Five Years Ten Years
James Balanced: Golden Rainbow Fund – Institutional Class Return Before Taxes 13.46% 7.12% 4.86%
Return After Taxes on Distributions 11.89% 5.83% 3.59%
Return After Taxes on Distributions and Sale of Fund Shares 8.75% 5.32% 3.54%
Bloomberg US 3000 Total Return Index*
(reflects no deduction for fees, expenses or taxes)
17.21% 13.09% 14.27%
VettaFi US Equity 3000 Index
(reflects no deduction for fees, expenses or taxes)
17.16% 13.01% 14.25%
Blended Index (25% Bloomberg US 1000 Total Return Index, 25% Bloomberg US 2000 Total Return Index, 50% Bloomberg Intermediate U.S. Government/Credit Bond Index)
(reflects no deduction for fees, expenses or taxes)**
10.81% 5.78% 7.64%

 

*Effective March 31, 2026, the Fund changed its broad-based securities market index from the VettaFi US Equity 3000 Index to the Bloomberg US 3000 Total Return Index. The Fund changed its broad-based securities market index because the Adviser believes the new broad-based securities market index represents a better comparison against which to measure the Fund’s performance.

 

**Additional index.
Index No Deduction for Fees, Expenses, or Taxes [Text] reflects no deduction for fees, expenses or taxes
Performance Table Closing [Text Block]

After-tax returns are calculated using the historical highest individual federal marginal income tax rates for the character of income in question (as ordinary income or long-term capital gain) and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. The after-tax returns are not relevant if you hold your Fund shares in tax-qualified arrangements, such as 401(k) plans or individual retirement accounts (“IRA”).

Performance Availability Website Address [Text] www.jamesinvestment.com
Performance Availability Phone [Text] 1-800-99-JAMES (1-800-995-2637)