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Note 10 - Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | December 31, 2020 |  |  | December 31, 2019 |
Compensation and related expenses |  | $ | 7,345 |  |  | $ | 5,830 |
Professional fees |  |  | 3,438 |  |  |  | 3,850 |
Operating lease liability - current |  |  | 1,437 |  |  |  | 1,141 |
Clinical trial costs |  |  | 1,429 |  |  |  | 788 |
Finance lease liability - current |  |  | 148 |  |  |  | - |
Other |  |  | 996 |  |  |  | 836 |
Total |  | $ | 14,793 |  |  | $ | 12,445 |

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