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Note 2 - Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - Customer Concentration Risk [Member]
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Customer A [Member] | Revenue from Contract with Customer Benchmark [Member]    
Customer concentration risk 26.00% 33.00%
Customer A [Member] | Accounts Receivable [Member]    
Customer concentration risk 35.00% 40.00%
Customer B [Member] | Revenue from Contract with Customer Benchmark [Member]    
Customer concentration risk 27.00% 9.00%
Customer B [Member] | Accounts Receivable [Member]    
Customer concentration risk 25.00% 9.00%
Customer C [Member] | Revenue from Contract with Customer Benchmark [Member]    
Customer concentration risk 16.00% 20.00%
Customer C [Member] | Accounts Receivable [Member]    
Customer concentration risk 15.00% 29.00%
Customer D [Member] | Revenue from Contract with Customer Benchmark [Member]    
Customer concentration risk 16.00% 17.00%
Customer D [Member] | Accounts Receivable [Member]    
Customer concentration risk 14.00% 11.00%