v3.26.3
Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000 Index (reflects no deduction for fees or expenses)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] [1] Russell 3000 Index* (reflects no deduction for fees or expenses)      
Average Annual Return, Percent [1]   17.15% 13.15% 14.29%
Russell 2000 Value Index (reflects no deduction for fees or expenses)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Russell 2000 Value Index (reflects no deduction for fees or expenses)      
Average Annual Return, Percent   12.59% 8.88% 9.27%
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] [1] S&P 500 Index* (reflects no deduction for fees, expenses, or taxes)      
Average Annual Return, Percent [1]   17.88% 14.42% 14.82%
Towle Small-Cap Value ETF Class        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return Before Taxes      
Average Annual Return, Percent   1.50% 6.28% 7.80%
Towle Small-Cap Value ETF Class | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions      
Average Annual Return, Percent   1.40% 5.22% 6.46%
Towle Small-Cap Value ETF Class | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Label [Optional Text] Return After Taxes on Distributions and Sale of Fund Shares      
Average Annual Return, Percent   0.97% 4.92% 6.15%
[1] The Fund has selected the Russell 3000 Index, which represents the overall market in which the Fund invests, as its primary benchmark, replacing the S&P 500 Index.