Performance Management |
Oct. 28, 2026 |
|---|---|
| AAMA Equity Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance Information |
| Performance Narrative [Text Block] | The information below 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 returns for the years indicated compared with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. The bar chart and table below assume reinvestment of dividends and distributions. |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The information below 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 returns for the years indicated compared with those of a broad measure of market performance. |
| Bar Chart Narrative [Text Block] | Annual Total Returns
The bar chart below provides an illustration of the Fund’s performance. |
| Bar Chart [Heading] | Annual Return for the Year Ended December 31 |
| Bar Chart Closing [Text Block] | During the periods shown in the bar chart, the highest return for a calendar quarter was 15.83% (quarter ended June 30, 2020) and the lowest return for a calendar quarter was -17.96% (quarter ended March 31, 2020). The Fund’s fiscal year end is June 30. The Fund’s year-to-date return through September 30, 2026 was 14.42%. |
| Performance Table Heading | Average Annual Total Returns (For the periods ended December 31, 2025) |
| Performance Table Narrative | The table below shows returns on a before-tax and after-tax basis. After-tax returns will vary. 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. After-tax returns on distributions and redemptions may be higher than after-tax returns on distributions due to tax credits for realized losses a shareholder may experience upon the redemption of fund shares. 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. Updated performance information is available by calling 800-701-9502. |
| Performance Table Uses Highest Federal Rate | After-tax returns will vary. 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 | 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. |
| Performance Table Explanation after Tax Higher | After-tax returns on distributions and redemptions may be higher than after-tax returns on distributions due to tax credits for realized losses a shareholder may experience upon the redemption of fund shares. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deductions for fees, expenses or taxes) |
| Performance Availability Phone [Text] | 800-701-9502 |
| AAMA Equity Fund | AAMA Equity Fund Shares | |
| Prospectus [Line Items] | |
| Year to Date Return, Label [Optional Text] | year-to-date return |
| Bar Chart, Year to Date Return | 14.42% |
| Bar Chart, Year to Date Return, Date | Sep. 30, 2026 |
| Highest Quarterly Return, Label [Optional Text] | highest return for a calendar quarter |
| Highest Quarterly Return | 15.83% |
| Highest Quarterly Return, Date | Jun. 30, 2020 |
| Lowest Quarterly Return, Label [Optional Text] | lowest return for a calendar quarter |
| Lowest Quarterly Return | (17.96%) |
| Lowest Quarterly Return, Date | Mar. 31, 2020 |
| AAMA Income Fund | |
| Prospectus [Line Items] | |
| Bar Chart and Performance Table [Heading] | Fund Performance Information |
| Performance Narrative [Text Block] | The information below 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 returns for the years indicated compared with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. The bar chart and table below assume reinvestment of dividends and distributions. |
| Performance Past Does Not Indicate Future [Text] | The Fund’s past performance (before and after taxes) does not necessarily indicate how it will perform in the future. |
| Performance Information Illustrates Variability of Returns [Text] | The information below 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 returns for the years indicated compared with those of a broad measure of market performance. |
| Bar Chart Narrative [Text Block] | Annual Total Returns
The bar chart below provides an illustration of the Fund’s performance. |
| Bar Chart [Heading] | Annual Return for the Year Ended December 31 |
| Bar Chart Closing [Text Block] | During the periods shown in the bar chart, the highest return for a calendar quarter was 2.57% (quarter ended December 31, 2023) and the lowest return for a calendar quarter was -3.36% (quarter ended March 31, 2022). The Fund’s fiscal year end is June 30. The Fund’s year-to-date return through September 30, 2026 was -0.15%. |
| Performance Table Heading | Average Annual Total Returns (For the periods ended December 31, 2025) |
| Performance Table Narrative | The table below shows returns on a before-tax and after-tax basis. After-tax returns will vary. 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. After-tax returns on distributions and redemptions may be higher than after-tax returns on distributions due to tax credits for realized losses a shareholder may experience upon the redemption of fund shares. 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. Updated performance information is available by calling 800-701-9502. |
| Performance Table Uses Highest Federal Rate | After-tax returns will vary. 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 | 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. |
| Performance Table Explanation after Tax Higher | After-tax returns on distributions and redemptions may be higher than after-tax returns on distributions due to tax credits for realized losses a shareholder may experience upon the redemption of fund shares. |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | (reflects no deductions for fees, expenses or taxes) |
| Performance Availability Phone [Text] | 800-701-9502 |
| AAMA Income Fund | AAMA Income Fund Shares | |
| Prospectus [Line Items] | |
| Year to Date Return, Label [Optional Text] | year-to-date return |
| Bar Chart, Year to Date Return | (0.15%) |
| Bar Chart, Year to Date Return, Date | Sep. 30, 2026 |
| Highest Quarterly Return, Label [Optional Text] | highest return for a calendar quarter |
| Highest Quarterly Return | 2.57% |
| Highest Quarterly Return, Date | Dec. 31, 2023 |
| Lowest Quarterly Return, Label [Optional Text] | lowest return for a calendar quarter |
| Lowest Quarterly Return | (3.36%) |
| Lowest Quarterly Return, Date | Mar. 31, 2022 |