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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 |  |  |

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