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Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Share-based compensation expense $ 562,966 $ 239,134 $ 1,261,577 $ 745,155
Share-Based Payment Arrangement, Option [Member]        
Share-based compensation expense 207,136 10,574 306,895 32,192
Restricted Stock [Member]        
Share-based compensation expense 157,056 138,781 302,900 304,999
Restricted Stock Units (RSUs) [Member]        
Share-based compensation expense $ 198,774 $ 89,779 $ 651,782 $ 407,964