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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract] |  |  |
Reserve for unfunded loan commitments |  | $ 320 | $ 305
Employee severance compensation plan, employee minimum service requirement (in years) | 2 years |  |
Employee severance compensation plan, period following effective date of a change in company control (in months) | 12 months |  |
Employee severance compensation plan, eligible payment, maximum compensation term (in months) | 18 months |  |

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