Note 8 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Compensation and related expenses	$ 7,715	$ 11,303
Professional fees	4,152	3,145
Parcus arbitration settlement	3,250	0
Clinical trial costs	1,059	999
Income taxes payable	889	810
Other	575	510
Total	19,745	18,840
Accrued Expenses and Other Current Liabilities [Member]
Operating lease liability - current	$ 2,105	$ 2,073