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Note 7 - Intangible Assets, Net (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | September 30, 2025 |  |  | December 31, 2024 |
Acquired and in-licensed rights |  | $ | 102,500 |  |  | $ | 102,500 |
Less: accumulated amortization |  |  | (58,673 | ) |  |  | (51,369 | )
Total intangible assets, net |  | $ | 43,827 |  |  | $ | 51,131 |

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