Leases - Supplemental information (Details) - USD ($)	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021
Leases
Lease expense	$ 223,000	$ 211,000
Consolidated Statements of Condition:
Premises and equipment - Operating lease right of use assets	1,904,000		$ 2,117,000
Accounts payable, accrued interest and other liabilities - Operating lease liabilities	1,970,000		$ 2,192,000
Consolidated Statements of Operations:
Premises and occupancy expenses from operating leases	200,000	199,000
Equipment expenses from operating leases	23,000	12,000
Consolidated Statements of Cash Flows:
Operating cash flows for operating leases, net	$ 232,000	$ 226,000