Commitments and Contingencies (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Reserve for unfunded loan commitments	$ 327
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