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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, 2025 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted- |
|  | Gross |  |  |  |  |  |  | Net |  |  | Average |
|  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Remaining |
|  | Amount |  |  | Amortization |  |  | Amount |  |  | Life (2) |
|  | (in thousands) |  |  | (in years) |
Product technology rights (1) |  | $ | 22,200 |  |  | $ | (5,592 | ) |  | $ | 16,608 |  |  |  | 12.7 |
Technology rights |  |  | 30,200 |  |  |  | (7,607 | ) |  |  | 22,593 |  |  |  | 12.7 |
Commercialization rights |  |  | 3,000 |  |  |  | — |  |  |  | 3,000 |  |  |  | N/A |
Total intangible assets |  | $ | 55,400 |  |  | $ | (13,199 | ) |  | $ | 42,201 |  |  |  | 12.7 |
|  | June 30, 2024 |
|  |  |  |  |  |  |  |  |  |  |  |  |  | Weighted- |
|  | Gross |  |  |  |  |  |  | Net |  |  | Average |
|  | Carrying |  |  | Accumulated |  |  | Carrying |  |  | Remaining |
|  | Amount |  |  | Amortization |  |  | Amount |  |  | Life |
|  | (in thousands) |  |  | (in years) |
Product technology rights |  | $ | 41,268 |  |  | $ | (13,184 | ) |  | $ | 28,084 |  |  |  | 10.7 |
Technology rights |  |  | 30,200 |  |  |  | (5,831 | ) |  |  | 24,369 |  |  |  | 13.8 |
Total intangible assets |  | $ | 71,468 |  |  | $ | (19,015 | ) |  | $ | 52,453 |  |  |  | 12.0 |
Finite-Lived Intangible Assets Amortization Expense [Table Text Block] |
​ |  | Year Ended |
​ |  | June 30, |
​ |  | 2025 |  |  | 2024 |
​ |  | (in thousands) |
Statement of operations classification: |  |  |  |  |  |  |  |
Cost of goods sold |  | $ | 1,306 |  |  | $ | 1,306 |
Operating expenses |  |  | 3,683 |  |  |  | 3,683 |
Total amortization of intangible assets expense |  | $ | 4,989 |  |  | $ | 4,989 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | June 30, |
|  | (in thousands) |
2026 |  | $ | 3,489 |
2027 |  |  | 3,692 |
2028 |  |  | 3,692 |
2029 |  |  | 3,692 |
2030 |  |  | 3,692 |
Thereafter |  |  | 23,944 |
Total estimated future amortization expense |  | $ | 42,201 |

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