Note 10 - Leases - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating lease cost	$ 1,191	$ 1,583
Short-term lease cost	$ 82	$ 47
Weighted average remaining lease term (in years) (Year)	5 years 8 months 12 days
Weighted average discount rate	4.20%
Minimum [Member]
Range of remaining lease terms (in years) (Year)	3 months 18 days
Maximum [Member]
Range of remaining lease terms (in years) (Year)	9 years 3 months 18 days