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Stock Based Incentive Compensation - Narrative (Details) |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 21, 2024 | Sep. 30, 2024 USD ($) shares | Sep. 30, 2023 USD ($) shares | Sep. 30, 2019 shares | Sep. 30, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense | $ |  | $ 1,579,000 | $ 1,126,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 305,000 | 286,344 |  |
Stock split ratio | 2 |  | 2 |  |
Percentage of stock dividend effected from stock split | 100.00% |  | 100.00% |  |
Employee Benefits and Share-based Compensation, Cash | $ |  | $ 0 |  |  |
The 2015 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  |  |  |  | 600,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized |  |  | 800,000 | 600,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |  | 192,434 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award Expiration |  | 10 years |  |  |
Officers and CEO |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 104,000 | 104,000 |  |
Chief Executive Officer |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 70,000 | 70,000 |  |
Director |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 40,000 | 40,000 |  |
Key Employees |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |  | 161,000 | 142,344 |  |
Restricted Stock | Officers and CEO |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 4 years |  |  |
Restricted Stock | Director |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 1 year |  |  |
Restricted Stock | Key Employees |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 4 years |  |  |
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Outstanding stock option |  | 0 |  |  |
Employee Stock Option | The 2015 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Outstanding stock option |  | 0 | 0 |  |

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