Note 16 - Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Loss before income taxes	$ (9,388)	$ (8,364)
Theoretical tax benefit at the statutory rate (21.0% in 2023 and 2022)	(1,971)	(1,756)
Differences in jurisdictional tax rates	(267)	(252)
Valuation allowance	2,441	2,067
Non-deductible expenses	32	213
Total income tax provision	235	272
Net loss	$ (9,623)	$ (8,636)