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Stock Compensation Plans (Details) - USD ($)
6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares) 265,980 329,110 306,240 369,150
Aggregate intrinsic value of options exercised during the period $ 386,000 $ 499,000    
Number of unvested stock options (shares) 71,230 121,820    
Unvested stock options, aggregate grant date fair value $ 431,000 $ 709,000,000    
Unvested stock options, aggregate intrinsic value 282,000      
Stock options vested during period, aggregate grant date fair value $ 16,000 $ 2,000    
Stock options vested during period (shares) 2,500 300    
Stock options, outstanding, aggregate intrinsic value $ 1,200,000 $ 1,060,000.00    
Unrecognized compensation expense, non-vested options $ 363,000      
Unrecognized compensation expense, non-vested options, amortization period (in years) 1 year 5 months 15 days      
Number of unvested shares 46,985   49,015 26,150
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (years) 5 years      
Granted (shares) 0 0    
Stock Options | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (years) 3 years      
Stock Options | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (years) 5 years      
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term 10 years      
Unrecognized compensation expense, non-vested options, amortization period (in years) 2 years 3 months 25 days      
Cost not yet recognized $ 1,210,000      
Equity Incentive Plan 2019        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares) 350,000      
Number of shares available for grant (in shares) 160,185      
Equity Incentive Plan 2019 | Employee        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares) 300,000      
Equity Incentive Plan 2019 | Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized (in shares) 50,000      
Equity Incentive Plan 2014        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding (in shares) 159,780      
Options vested (in shares) 137,350      
Options unvested (in shares) 22,430