Leases - Supplemental information (Details) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Leases
Lease expense	$ 927,000	$ 882,000
Consolidated Statements of Condition:
Premises and equipment - Operating lease right of use assets	1,356,000	2,147,000
Accounts payable, accrued interest and other liabilities - Operating lease liabilities	$ 1,407,000	$ 2,169,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities
Consolidated Statements of Operations:
Premises and occupancy expenses from operating leases	$ 789,000	$ 787,000
Equipment expenses from operating leases	138,000	95,000
Total lease expense	927,000	882,000
Consolidated Statements of Cash Flows:
Operating cash flows from operating leases, net	$ 884,000	$ 879,000