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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

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