Note 4 - Leases -Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Weighted average remaining lease term (years) (Year)	4 years 1 month 20 days
Operating lease cost	$ 2,967	$ 3,117	$ 3,085
Weighted average discount rate	3.99%
Cash payments for operating leases	$ 2,947	$ 3,051	$ 3,175