Note 8 - Leases - Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted average remaining lease term (in years) (Year)	6 years 9 months 7 days	6 years 11 months 1 day
Weighted average discount rate	3.16%	3.09%
Operating lease cost	$ 1,072	$ 1,069	$ 993
Short-term lease cost	0	0	3
Total lease cost	1,072	1,069	996
Cash paid for amounts included in the measurement of lease liabilities	1,083	1,047	$ 959
Other Liabilities [Member]
Lease liabilities	3,318	4,023
Other Assets [Member]
Right-of-use assets	$ 3,245	$ 3,939