Summary of Significant Accounting Policies - Stock-Based Compensation (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
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Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Total stock-based compensation expense | $ 1,235 | $ 1,230 | $ 1,306 |
| Forfeitures | (23) | ||
| Executives | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Total stock-based compensation expense | 330 | 349 | 497 |
| Management and Other Employees | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Total stock-based compensation expense | 267 | 37 | 76 |
| Board of Directors | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Total stock-based compensation expense | $ 661 | $ 844 | $ 733 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Value of forfeited shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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