Note 6 - Leases - Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Weighted average remaining lease term (years) (Year)	6 years 9 months 29 days		6 years 9 months 7 days
Weighted average discount rate	3.19%		3.16%
Operating lease cost	$ 267	$ 267
Short-term lease cost	0	0
Total lease cost	267	267
Cash paid for amounts included in the measurement of lease liabilities	272	$ 269
Other Liabilities [Member]
Lease liabilities	3,071		$ 3,318
Other Assets [Member]
Right-of-use assets	$ 3,003		$ 3,245