Note 8 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Compensation and related expenses	$ 8,690	$ 11,303
Professional fees	2,802	3,145
Clinical trial costs	462	999
Income taxes payable	931	810
Other	542	510
Total	15,512	18,840
Accrued Expenses and Other Current Liabilities [Member]
Operating lease liability - current	$ 2,085	$ 2,073