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Note 5 - Prepaid Expenses - Schedule of Prepaid Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Prepaid research and development $ 4,488 $ 1,853
Prepaid insurance 579 461
Professional services 186 124
Other 51 50
Total prepaid expenses $ 5,304 $ 2,488