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Note 12 - Stock-based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Share-Based Payment Arrangement, Expense $ 152,000 $ 438,000 $ 629,000 $ 1,300
Share-Based Payment Arrangement, Option [Member]        
Share-Based Payment Arrangement, Expense 126,000 134,000 480,000 338,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value 0   0  
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount 973,000   $ 973,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     2 years 11 months 1 day  
Restricted Stock [Member]        
Share-Based Payment Arrangement, Expense 26,000 $ 304,000 $ 149,000 $ 937,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)     1 year 11 months 1 day  
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 317,000   $ 317,000