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Note 7 - Intangible Assets (Tables) | 12 Months Ended
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Jun. 30, 2025
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
​ |  | June 30, 2024 |
​ |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted- Average Remaining Life |
​ |  | (in thousands) |  |  | (in years) |
Acquired product technology rights |  | $ | 41,268 |  |  | $ | (13,184 | ) |  | $ | 28,084 |  |  |  | 10.7 |
Acquired technology rights |  |  | 30,200 |  |  |  | (5,831 | ) |  |  | 24,369 |  |  |  | 13.8 |
Total definite-lived intangible assets |  | $ | 71,468 |  |  | $ | (19,015 | ) |  | $ | 52,453 |  |  |  | 12.0 |
​ |  | June 30, 2023 |
​ |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Weighted- Average Remaining Life |
​ |  | (in thousands) |  |  | (in years) |
Acquired product technology rights |  | $ | 42,176 |  |  | $ | (10,881 | ) |  | $ | 31,295 |  |  |  | 11.5 |
Acquired technology rights |  |  | 30,200 |  |  |  | (4,054 | ) |  |  | 26,146 |  |  |  | 14.8 |
Total definite-lived intangible assets |  | $ | 72,376 |  |  | $ | (14,935 | ) |  | $ | 57,441 |  |  |  | 13.0 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
​ |  | June 30, |
​ |  | (in thousands) |
2025 |  | $ | 4,989 |
2026 |  |  | 4,989 |
2027 |  |  | 4,989 |
2028 |  |  | 4,989 |
2029 |  |  | 4,989 |
Thereafter |  |  | 27,508 |
Total future amortization expense |  | $ | 52,453 |

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