Note 6 - Allowance for Loan Losses and Credit Quality Information - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 9,279	$ 10,699
Provision for losses	1,071	(2,119)
Charge-offs	(115)	(78)
Recoveries	42	777
Balance	10,277	9,279
Specific reserves	162	406
General reserves	10,115	8,873
Balance	10,277	9,279
Individually reviewed for impairment	2,140	4,650
Collectively reviewed for impairment	785,747	657,350
Ending balance	787,887	662,000
Residential Portfolio Segment [Member]
Balance	974	1,030
Provision for losses	286	(56)
Charge-offs	0	0
Recoveries	1	0
Balance	1,261	974
Specific reserves	33	36
General reserves	1,228	938
Balance	1,261	974
Individually reviewed for impairment	908	340
Collectively reviewed for impairment	204,982	162,982
Ending balance	205,890	163,322
Commercial Real Estate Portfolio Segment [Member]
Balance	6,388	7,295
Provision for losses	729	(1,524)
Charge-offs	(91)	(36)
Recoveries	0	653
Balance	7,026	6,388
Specific reserves	0	280
General reserves	7,026	6,108
Balance	7,026	6,388
Individually reviewed for impairment	179	3,757
Collectively reviewed for impairment	471,166	393,111
Ending balance	471,345	396,868
Consumer Portfolio Segment [Member]
Balance	981	1,389
Provision for losses	94	(424)
Charge-offs	(24)	(42)
Recoveries	7	58
Balance	1,058	981
Specific reserves	112	83
General reserves	946	898
Balance	1,058	981
Individually reviewed for impairment	492	546
Collectively reviewed for impairment	44,325	41,099
Ending balance	44,817	41,645
Commercial Portfolio Segment [Member]
Balance	936	985
Provision for losses	(38)	(115)
Charge-offs	0	0
Recoveries	34	66
Balance	932	936
Specific reserves	17	7
General reserves	915	929
Balance	932	936
Individually reviewed for impairment	561	7
Collectively reviewed for impairment	65,274	60,158
Ending balance	$ 65,835	$ 60,165