Note 7 - Leases - Supplemental Cash Flow Information Related to Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Operating cash flows used for operating leases (in thousands)	$ 5,731
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 0
Weighted average remaining lease term (in years) (Year)	4 years 2 months 12 days
Weighted average discount rate	10.90%