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Note 6 - Leases (Details Textual) - USD ($)
3 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Jul. 31, 2024
May 31, 2023
Finance Lease, Liability $ 0   $ 0    
Operating Lease, Right-of-Use Asset 1,010,000   1,061,000    
Operating Lease, Liability 1,225,000   $ 1,122,000    
Operating Lease, Payments $ 100,000 $ 200,000      
Office Space in Berwyn, Pennsylvania [Member]          
Operating Lease, Right-of-Use Asset       $ 500,000  
Operating Lease, Liability       $ 500,000  
Lessee, Operating Lease, Discount Rate       12.30%  
Principal Office Denver Colorado [Member]          
Operating Lease, Undiscounted Minimum Monthly Payment         $ 15,500
Lessee, Operating Lease, Renewal Term (Year)         5 years