Fair Value of Financial Instruments - Non-Recurring Basis (Details) - USD ($)	Mar. 31, 2023	Jun. 30, 2022
Assets at fair value
Reserves on impaired loans	$ 0	$ 0
Non-recurring basis
Assets at fair value
Premises transferred to held for sale		1,596,000
Total assets at fair value		3,286,000
Non-recurring basis | Impaired loans
Assets at fair value
Impaired loans		1,690,000
Non-recurring basis | Level 3
Assets at fair value
Premises transferred to held for sale		1,596,000
Total assets at fair value		3,286,000
Non-recurring basis | Level 3 | Impaired loans
Assets at fair value
Impaired loans		$ 1,690,000