Note 5 - Loans and Leases - Change in Allowance (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2023		Mar. 31, 2022	Dec. 31, 2022
Beginning balance	$ 17,149		$ 15,624	$ 15,624
Initial allowance on loans purchased with credit deterioration	126
Charge-offs	(303)		(95)	(815)
Recoveries	140		27	240
Provision for credit losses on loans	180		525
Ending balance	17,910		16,081	17,149
Ending balance: individually evaluated	249			161
Ending balance: collectively evaluated	17,661			16,988
Financing Receivable, before Allowance for Credit Loss	1,626,999	[1],[2]		1,564,174	[3],[4]
Ending balance: individually evaluated	8,703			3,868
Ending balance: collectively evaluated	1,618,296			1,560,306
Provision			525	2,100
Ending balance: individually evaluated for impairment	249			161
Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	618
Ending balance				618
Commercial Portfolio Segment [Member]
Beginning balance	2,924		2,204	2,204
Initial allowance on loans purchased with credit deterioration	0
Charge-offs	(170)		0	(371)
Recoveries	20		2	11
Provision for credit losses on loans	(502)
Ending balance	2,550		2,780	2,924
Ending balance: individually evaluated	42			48
Ending balance: collectively evaluated	2,508			2,876
Financing Receivable, before Allowance for Credit Loss	247,057	[1]		234,478	[3]
Ending balance: individually evaluated	772			719
Ending balance: collectively evaluated	246,285			233,759
Provision			574	1,080
Ending balance: individually evaluated for impairment	42			48
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	278
Ending balance				278
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	7,162		7,422	7,422
Initial allowance on loans purchased with credit deterioration	126
Charge-offs	(32)		(1)	(67)
Recoveries	39		9	153
Provision for credit losses on loans	106
Ending balance	8,157		6,822	7,162
Ending balance: individually evaluated	202			112
Ending balance: collectively evaluated	7,955			7,050
Financing Receivable, before Allowance for Credit Loss	625,682	[1]		606,618	[3]
Ending balance: individually evaluated	7,198			2,782
Ending balance: collectively evaluated	618,484			603,836
Provision			(608)	(346)
Ending balance: individually evaluated for impairment	202			112
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	756
Ending balance				756
Consumer Portfolio Segment [Member]
Beginning balance	2,827		2,404	2,404
Initial allowance on loans purchased with credit deterioration	0
Charge-offs	(101)		(94)	(377)
Recoveries	72		14	74
Provision for credit losses on loans	197
Ending balance	2,448		2,547	2,827
Ending balance: individually evaluated	5			1
Ending balance: collectively evaluated	2,443			2,826
Financing Receivable, before Allowance for Credit Loss	291,912	[1],[5]		282,710	[3],[6]
Ending balance: individually evaluated	259			364
Ending balance: collectively evaluated	291,653			282,346
Provision			223	726
Ending balance: individually evaluated for impairment	5			1
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	(547)
Ending balance				(547)
Residential Portfolio Segment [Member]
Beginning balance	4,169		3,508	3,508
Initial allowance on loans purchased with credit deterioration	0
Charge-offs	0		0	0
Recoveries	9		2	2
Provision for credit losses on loans	307
Ending balance	4,683		3,851	4,169
Ending balance: individually evaluated	0			0
Ending balance: collectively evaluated	4,683			4,169
Financing Receivable, before Allowance for Credit Loss	462,348	[1]		440,368	[3]
Ending balance: individually evaluated	474			3
Ending balance: collectively evaluated	461,874			440,365
Provision			341	659
Ending balance: individually evaluated for impairment	0			0
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	198
Ending balance				198
Unallocated Financing Receivables [Member]
Beginning balance	67		86	86
Initial allowance on loans purchased with credit deterioration	0
Charge-offs	0		0	0
Recoveries	0		0	0
Provision for credit losses on loans	72
Ending balance	72		81	67
Ending balance: individually evaluated	0			0
Ending balance: collectively evaluated	72			67
Financing Receivable, before Allowance for Credit Loss	0	[1]		0	[3]
Ending balance: individually evaluated	0			0
Ending balance: collectively evaluated	0			0
Provision			$ (5)	(19)
Ending balance: individually evaluated for impairment	0			0
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	$ (67)
Ending balance				$ (67)

[1] Includes $4.8 million of net deferred loan costs.

[2] Includes net deferred loan costs of $4.8 million.

[3] Includes $4.6 million of net deferred loan costs.

[4] Includes net deferred loan costs of $4.6 million.

[5] Net of unearned lease revenue of $1.8 million

[6] Net of unearned lease revenue of $1.7 million.