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Note 9 - Accrued Liabilities | 12 Months Ended
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Dec. 31, 2025
Notes to Financial Statements |
Accounts Payable and Accrued Liabilities Disclosure [Text Block] | 9. Accrued Liabilities Accrued liabilities consisted of the following (in thousands):
|  | December 31, 2025 |  |  | December 31, 2024 |
Compensation |  | $ | 1,380 |  |  | $ | 1,060 |
Clinical trial costs |  |  | 1,291 |  |  |  | 2,277 |
Research and development services |  |  | 749 |  |  |  | 888 |
Professional services fees |  |  | 120 |  |  |  | 112 |
Other |  |  | 5 |  |  |  | 10 |
Total accrued liabilities |  | $ | 3,545 |  |  | $ | 4,347 |

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