Note 9 - Allowance for Loan Losses and Credit Quality Information - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Balance	$ 9,584	$ 10,132	$ 9,279	$ 10,699
Provision for losses	66	(891)	362	(1,467)
Charge-offs	(15)	(11)	(16)	(42)
Recoveries	9	685	19	725
Balance	9,644	9,915	9,644	9,915
Specific reserves	404		404		$ 406
General reserves	9,240		9,240		8,873
Balance	9,644	9,915	9,644	9,915	9,279
Individually reviewed for impairment	4,496		4,496		4,650
Collectively reviewed for impairment	683,946		683,946		657,350
Ending balance	688,442		688,442		662,000
Residential Portfolio Segment [Member]
Balance	1,002	839	974	1,030
Provision for losses	66	90	94	(101)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance	1,068	929	1,068	929
Specific reserves	32		32		36
General reserves	1,036		1,036		938
Balance	1,068	929	1,068	929	974
Individually reviewed for impairment	565		565		340
Collectively reviewed for impairment	173,268		173,268		162,982
Ending balance	173,833		173,833		163,322
Commercial Real Estate Portfolio Segment [Member]
Balance	6,495	7,073	6,388	7,295
Provision for losses	91	(690)	198	(912)
Charge-offs	0	0	0	0
Recoveries	0	650	0	650
Balance	6,586	7,033	6,586	7,033
Specific reserves	250		250		280
General reserves	6,336		6,336		6,108
Balance	6,586	7,033	6,586	7,033	6,388
Individually reviewed for impairment	3,466		3,466		3,757
Collectively reviewed for impairment	407,689		407,689		393,111
Ending balance	411,155		411,155		396,868
Consumer Portfolio Segment [Member]
Balance	991	1,189	981	1,389
Provision for losses	70	(166)	80	(336)
Charge-offs	(15)	(11)	(16)	(42)
Recoveries	1	27	2	28
Balance	1,047	1,039	1,047	1,039
Specific reserves	116		116		83
General reserves	931		931		898
Balance	1,047	1,039	1,047	1,039	981
Individually reviewed for impairment	459		459		546
Collectively reviewed for impairment	42,851		42,851		41,099
Ending balance	43,310		43,310		41,645
Commercial Portfolio Segment [Member]
Balance	1,096	1,031	936	985
Provision for losses	(161)	(125)	(10)	(118)
Charge-offs	0	0	0	0
Recoveries	8	8	17	47
Balance	943	914	943	914
Specific reserves	6		6		7
General reserves	937		937		929
Balance	943	$ 914	943	$ 914	936
Individually reviewed for impairment	6		6		7
Collectively reviewed for impairment	60,138		60,138		60,158
Ending balance	$ 60,144		$ 60,144		$ 60,165