Note 9 - Allowance for Loan Losses and Credit Quality Information - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Balance	$ 9,279	$ 10,699
Provision for losses	296	(576)
Charge-offs	(1)	(31)
Recoveries	10	40
Balance	9,584	10,132
Specific reserves	442		$ 406
General reserves	9,142		8,873
Balance	9,584	10,132	9,279
Individually reviewed for impairment	4,559		4,650
Collectively reviewed for impairment	684,367		657,350
Ending balance	688,926		662,000
Residential Portfolio Segment [Member]
Balance	974	1,030
Provision for losses	28	(191)
Charge-offs	0	0
Recoveries	0	0
Balance	1,002	839
Specific reserves	34		36
General reserves	968		938
Balance	1,002	839	974
Individually reviewed for impairment	478		340
Collectively reviewed for impairment	168,003		162,982
Ending balance	168,481		163,322
Commercial Real Estate Portfolio Segment [Member]
Balance	6,388	7,295
Provision for losses	107	(222)
Charge-offs	0	0
Recoveries	0	0
Balance	6,495	7,073
Specific reserves	280		280
General reserves	6,215		6,108
Balance	6,495	7,073	6,388
Individually reviewed for impairment	3,551		3,757
Collectively reviewed for impairment	403,903		393,111
Ending balance	407,454		396,868
Consumer Portfolio Segment [Member]
Balance	981	1,389
Provision for losses	10	(171)
Charge-offs	(1)	(31)
Recoveries	1	2
Balance	991	1,189
Specific reserves	121		83
General reserves	870		898
Balance	991	1,189	981
Individually reviewed for impairment	523		546
Collectively reviewed for impairment	40,508		41,099
Ending balance	41,031		41,645
Commercial Portfolio Segment [Member]
Balance	936	985
Provision for losses	151	8
Charge-offs	0	0
Recoveries	9	38
Balance	1,096	1,031
Specific reserves	7		7
General reserves	1,089		929
Balance	1,096	$ 1,031	936
Individually reviewed for impairment	7		7
Collectively reviewed for impairment	71,953		60,158
Ending balance	$ 71,960		$ 60,165