Note 8 - Leases (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Other Nonoperating Income	$ 251,000	$ 242,000
Lease, Cost	136,000	123,000
Operating Lease, Lease Income	101,000	$ 125,000
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]		Other Nonoperating Income
Building [Member]
Property, Plant, and Equipment, Lessor Asset under Operating Lease, before Accumulated Depreciation	1,700,000	$ 1,600,000
Property, Plant, and Equipment, Lessor Asset under Operating Lease, Accumulated Depreciation	$ 1,600,000	1,600,000
Property, Plant and Equipment, Useful Life (Year)	40 years
Other Assets [Member]
Lessor, Cost, Contracts Asset	$ 2,000	4,000
General and Administrative Expense [Member]
Lease, Cost	$ 133,000	$ 119,000