Commitments - Commitments outstanding (Details) - USD ($)	Sep. 30, 2022	Jun. 30, 2022
Loss Contingencies [Line Items]
Total commitments outstanding	$ 6,340,000	$ 6,735,000
Commitments to originate loans
Loss Contingencies [Line Items]
Total commitments outstanding	809,000	278,000
Undisbursed balance of loans closed
Loss Contingencies [Line Items]
Total commitments outstanding	$ 5,531,000	$ 6,457,000