Note 10 - Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating lease cost	$ 326	$ 324
Short-term lease cost	$ 30	$ 8
Weighted average remaining lease term (in years) (Year)	5 years 6 months
Weighted average discount rate	4.20%
Minimum [Member]
Range of remaining lease terms (in years) (Year)	1 year
Maximum [Member]
Range of remaining lease terms (in years) (Year)	9 years 1 month 6 days