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Stock Compensation Plans (Details)
 9 Months Ended
Jun. 30, 2025
USD ($)
plan
shares
Jun. 30, 2024
USD ($)
shares
Sep. 30, 2024
shares
Sep. 30, 2023
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock compensation plans | plan 1      
Options outstanding (in shares) 252,980 322,390 306,240 369,150
Aggregate intrinsic value of options exercised during the period | $ $ 487,000 $ 501,000    
Number of unvested stock options (shares) 69,430 121,820    
Unvested stock options, aggregate grant date fair value | $ $ 421,000 $ 709,000,000    
Unvested stock options, aggregate intrinsic value | $ 346,000      
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 | $ $ 1,330,000 $ 1,070,000.00    
Unrecognized compensation expense, non-vested options | $ $ 309,000      
Unrecognized compensation expense, non-vested options, amortization period (in years) 1 year 4 months 13 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 10 days      
Cost not yet recognized | $ $ 1,120,000      
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) 162,185      
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) 150,780      
Options vested (in shares) 128,350      
Options unvested (in shares) 22,430