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Commitments and Contingencies (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |
Reserve for unfunded loan commitments | $ 241 | $ 207
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 |
Employee severance compensation plan, annual compensation multiplier | 2.99 |
Employee severance compensation plan, period following effective date of change in control for eligible severance benefits (in years) | 5 years |

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