Note 5 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating leases	$ 292	$ 338	$ 954	$ 996
Short-term leases	36	44	124	133
Total lease cost	$ 328	$ 382	$ 1,078	$ 1,129
Weighted-average remaining lease term (in years) (Year)	5 years 2 months 12 days		5 years 2 months 12 days
Weighted-average discount rate	4.10%		4.10%