Note 9 - Accrued Expenses and Other Liabilities - Summary of Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Compensation and related expenses	$ 8,816	$ 9,523
Professional fees	3,154	3,590
Clinical trial costs	2,074	1,961
Other	1,033	1,059
Total	16,951	17,847
Accrued Expenses and Other Current Liabilities [Member]
Operating lease liability – current	1,742	1,526
Financing lease liability – current	$ 132	$ 188