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Note 5 - Leases (Details Textual) - USD ($)
3 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Income Statement [Abstract]      
Other Nonoperating Income $ 78,000 $ 57,000  
Lease, Cost 35,000 34,000  
Operating Lease, Lease Income $ 23,000 27,000  
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income    
Other Assets [Member]      
Lessor, Cost, Contracts Asset $ 1,000   $ 2,000
General and Administrative Expense [Member]      
Lease, Cost $ 34,000 $ 33,000