v3.26.3
Average Annual Total Returns
 12 Months Ended 60 Months Ended 102 Months Ended
Oct. 28, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
AAMA Equity Fund | S&P 500 Index (reflects no deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   17.88% 14.42% 14.88% [2]
Performance Inception Date Jul. 03, 2017      
AAMA Equity Fund | S&P 500 Equal Weight Index (reflects no deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [3]   11.43% 10.48% 11.06% [2]
Performance Inception Date Jul. 03, 2017      
AAMA Equity Fund | AAMA Equity Fund Shares        
Prospectus [Line Items]        
Average Annual Return, Percent   17.35% 11.02% 11.35% [2]
Performance Inception Date Jul. 03, 2017      
AAMA Equity Fund | AAMA Equity Fund Shares | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   14.37% 9.71% 10.49% [2]
Performance Inception Date Jul. 03, 2017      
AAMA Equity Fund | AAMA Equity Fund Shares | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   12.42% 8.64% 9.23% [2]
Performance Inception Date Jul. 03, 2017      
AAMA Income Fund | Bloomberg Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [4]   6.11% 1.56% 2.23% [5]
Performance Inception Date Jul. 03, 2017      
AAMA Income Fund | Bloomberg 1-5 Year U.S. Government/Credit Index (reflects no deductions for fees, expenses or taxes)        
Prospectus [Line Items]        
Average Annual Return, Percent [6]   7.30% (0.36%) 1.78% [5]
Performance Inception Date Jul. 03, 2017      
AAMA Income Fund | AAMA Income Fund Shares        
Prospectus [Line Items]        
Average Annual Return, Percent   3.94% 0.64% 1.02% [5]
Performance Inception Date Jul. 03, 2017      
AAMA Income Fund | AAMA Income Fund Shares | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   2.98% 0.00% 0.46% [5]
Performance Inception Date Jul. 03, 2017      
AAMA Income Fund | AAMA Income Fund Shares | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   2.33% 0.21% 0.54% [5]
Performance Inception Date Jul. 03, 2017      
[1] The S&P 500 Index is an unmanaged index generally representative of the U.S. stock market as a whole.
[2] AAMA Equity Fund commenced operations on July 3, 2017.
[3] The S&P 500 Equal Weight Index includes the same companies as the S&P 500 Index, but each company is allocated the same weight in the index at each quarterly rebalance.
[4] The Bloomberg U.S. Aggregate Bond Index is the Fund’s broad-based securities market index. The Bloomberg U.S. Aggregate Bond Index represents the overall U.S. dollar denominated investment grade bond market, which includes government bonds, investment grade corporate bonds, mortgage pass through securities, commercial mortgage backed securities and other asset backed securities.
[5] AAMA Income Fund commenced operations on July 3, 2017.
[6] The Bloomberg 1-5 Year U.S. Government/Credit Index measures the non-securitized component of the Bloomberg U.S. Aggregate Bond Index. It includes investment grade, U.S. dollar-denominated government bonds and corporate bonds that have a remaining maturity of greater than or equal to one year and less than five years.