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Note 12 - Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Share-Based Payment Arrangement, Expense $ 304,000 $ 216,000
Share-Based Payment Arrangement, Option [Member]    
Share-Based Payment Arrangement, Expense 229,000 155,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value 0  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 1,000,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 25 days  
Restricted Stock [Member]    
Share-Based Payment Arrangement, Expense $ 75,000 $ 26,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 565  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 1 month 20 days