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Equity and Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended | 84 Months Ended | 120 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2000 | Dec. 31, 2015 | Dec. 31, 2014 | Nov. 30, 2021 | Apr. 30, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock, par value | $ 0.01 | $ 0.01 |  |  |  |  |  |
Total cost of shares repurchased and retired | $ 4,115 |  | $ 2,000 |  |  |  |  |
Stock-based compensation expense | 543 | $ 401 | $ 326 |  |  |  |  |
Compensation cost on non-vested stock options not yet recognized | $ 700 |  |  |  |  |  |  |
Compensation cost, expected weighted-average recognition period | 1 year 2 months 8 days |  |  |  |  |  |  |
Shares available to grant | 946,000 |  |  |  |  |  |  |
2007 Plan | Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares available to grant |  |  |  |  |  |  |  | 500,000
Number of additional shares authorized |  |  |  |  | 2,500,000 |  |  |
2022 Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares available to grant | 946,000 |  |  |  |  |  |  |
2022 Plan | Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares available to grant |  |  |  |  |  |  | 1,000,000 |
Non-Employee Directors Stock Option Plan | Stock Options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of additional shares authorized |  |  |  |  |  | 400,000 |  |
Share-based compensation, shares issued |  |  |  | 100,000 |  |  |  |
2019 Stock Repurchase Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program period | 1 year |  |  |  |  |  |  |
Authorized stock repurchase amount | $ 4,000 |  |  |  |  |  |  |
2020 Stock Repurchase Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program period | 1 year |  |  |  |  |  |  |
Authorized stock repurchase amount | $ 4,000 |  |  |  |  |  |  |
Shares repurchased and retired during the period | 366,000 |  |  |  |  |  |  |
Total cost of shares repurchased and retired | $ 2,000 |  |  |  |  |  |  |
Average price per share of shares repurchased | $ 5.46 |  |  |  |  |  |  |
2021 Stock Repurchase Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program period | 1 year |  |  |  |  |  |  |
Authorized stock repurchase amount | $ 4,000 |  |  |  |  |  |  |
Shares repurchased and retired during the period | 291,383 |  |  |  |  |  |  |
Total cost of shares repurchased and retired | $ 2,700 |  |  |  |  |  |  |
Average price per share of shares repurchased | $ 9.31 |  |  |  |  |  |  |
2022 Stock Repurchase Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program period | 1 year |  |  |  |  |  |  |
Authorized stock repurchase amount | $ 5,000 |  |  |  |  |  |  |
Shares repurchased and retired during the period | 143,430 |  |  |  |  |  |  |
Total cost of shares repurchased and retired | $ 1,400 |  |  |  |  |  |  |
Average price per share of shares repurchased | $ 9.78 |  |  |  |  |  |  |
Amount Available for Repurchases | $ 3,600 |  |  |  |  |  |  |

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