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Note 6 - Prepaid Expenses - Schedule of Prepaid Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Prepaid research and development $ 4,619 $ 3,480
Prepaid insurance 520 387
Professional services 138 130
Other 18 34
Total prepaid expenses $ 5,295 $ 4,031