Note 5 - Loans and ACL for Loans - Allowance for Loan Losses by Portfolio Segment and Based on Impairment Evaluation Method (Details) - USD ($) $ in Thousands		3 Months Ended												12 Months Ended
	Jan. 01, 2020	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Beginning balance					$ 53,898				$ 51,920					$ 53,898	$ 51,920
Initial Allowance on PCD Loans														9,950	6,757	$ 1,635
Provision for credit losses														9,682	1,397
Charge-offs														(2,307)	(7,681)
Recoveries														2,308	1,505	456
Ending balance		$ 73,531				$ 53,898				$ 51,920				73,531	53,898	51,920
Beginning balance	$ 26,791								51,920				$ 26,791		51,920	26,791
Impact of adoption																8,221
Provision for credit losses		3,375	$ 4,803	$ (200)	2,279	(1,900)	$ (1,525)	$ 4,147	(1,475)	500	$ 4,968	$ 7,025	5,925			16,918
Charge-offs																(2,101)
Ending balance	36,647									51,920						51,920
Loans, individually evaluated for impairment		27,706				12,562								27,706	12,562
Allowance for loans, individually evaluated for impairment		5,822				1,768								5,822	1,768
Real Estate [Member]
Loans, individually evaluated for impairment		22,459				11,517								22,459	11,517
Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		5,028				798								5,028	798
Other Collateral [Member]
Loans, individually evaluated for impairment		219				247								219	247
Home Equity Line of Credit [Member]
Beginning balance					1,044				895					1,044	895
Initial Allowance on PCD Loans														2	147	0
Provision for credit losses														567	1
Charge-offs														0	0
Recoveries														0	1	0
Ending balance		1,613				1,044				895				1,613	1,044	895
Beginning balance	728								895				728		895	728
Impact of adoption																114
Provision for credit losses																53
Charge-offs																0
Ending balance	842									895						895
Loans, individually evaluated for impairment		205				646								205	646
Allowance for loans, individually evaluated for impairment		0				0								0	0
Home Equity Line of Credit [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		205				646								205	646
Home Equity Line of Credit [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Home Equity Line of Credit [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Real Estate Portfolio Segment [Member]
Beginning balance					25,555				26,379					25,555	26,379
Initial Allowance on PCD Loans														5,629	3,603	1,502
Provision for credit losses														2,112	(205)
Charge-offs														(78)	(4,974)
Recoveries														250	752	12
Ending balance		33,468				25,555				26,379				33,468	25,555	26,379
Beginning balance	8,562								26,379				8,562		26,379	8,562
Impact of adoption																4,488
Provision for credit losses																13,309
Charge-offs																(1,494)
Ending balance	14,552									26,379						26,379
Loans, individually evaluated for impairment		19,179				8,372								19,179	8,372
Allowance for loans, individually evaluated for impairment		3,498				1,652								3,498	1,652
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		19,179				8,372								19,179	8,372
Commercial Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Beginning balance					15,960				19,396					15,960	19,396
Initial Allowance on PCD Loans														3,508	1,491	152
Provision for credit losses														3,173	(2,031)
Charge-offs														(37)	(3,065)
Recoveries														37	169	12
Ending balance		22,641				15,960				19,396				22,641	15,960	19,396
Beginning balance	5,235								19,396				5,235		19,396	5,235
Impact of adoption																2,946
Provision for credit losses																11,194
Charge-offs																(143)
Ending balance	8,333									19,396						19,396
Loans, individually evaluated for impairment		14,764				720								14,764	720
Allowance for loans, individually evaluated for impairment		2,652				0								2,652	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		14,764				720								14,764	720
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Beginning balance					9,595				6,983					9,595	6,983
Initial Allowance on PCD Loans														2,121	2,112	1,350
Provision for credit losses														(1,061)	1,826
Charge-offs														(41)	(1,909)
Recoveries														213	583	0
Ending balance		10,827				9,595				6,983				10,827	9,595	6,983
Beginning balance	3,327								6,983				3,327		6,983	3,327
Impact of adoption																1,542
Provision for credit losses																2,115
Charge-offs																(1,351)
Ending balance	6,219									6,983						6,983
Loans, individually evaluated for impairment		4,415				7,652								4,415	7,652
Allowance for loans, individually evaluated for impairment		846				1,652								846	1,652
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		4,415				7,652								4,415	7,652
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial and Industrial Portfolio Segment [Member]
Loans, individually evaluated for impairment		5,489				798								5,489	798
Allowance for loans, individually evaluated for impairment		1,966				0								1,966	0
Commercial and Industrial Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		461				0								461	0
Commercial and Industrial Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		5,028				798								5,028	798
Commercial and Industrial Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Beginning balance					8,577				8,970					8,577	8,970
Initial Allowance on PCD Loans														1,358	1,022	0
Provision for credit losses														2,497	(112)
Charge-offs														(724)	(1,337)
Recoveries														1,283	34	9
Ending balance		12,991				8,577				8,970				12,991	8,577	8,970
Beginning balance	6,782								8,970				6,782		8,970	6,782
Impact of adoption																365
Provision for credit losses																1,832
Charge-offs																(18)
Ending balance										8,970						8,970
Loans, individually evaluated for impairment		2,246				598								2,246	598
Allowance for loans, individually evaluated for impairment		1,205				0								1,205	0
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		39				0								39	0
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		2,207				598								2,207	598
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Beginning balance					4,802				3,614					4,802	3,614
Initial Allowance on PCD Loans														1,874	1,755	0
Provision for credit losses														(87)	(567)
Charge-offs														(200)	0
Recoveries														0	0	0
Ending balance		6,389				4,802				3,614				6,389	4,802	3,614
Beginning balance	5,657								3,614				5,657		3,614	5,657
Impact of adoption																(1,528)
Provision for credit losses																(515)
Charge-offs																0
Ending balance	4,129									3,614						3,614
Loans, individually evaluated for impairment		3,243				200								3,243	200
Allowance for loans, individually evaluated for impairment		761				0								761	0
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		422				0								422	0
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		2,821				200								2,821	200
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Total Commercial and Industrial Portfolio Segment [Member]
Beginning balance					13,379				12,584					13,379	12,584
Initial Allowance on PCD Loans														3,232	2,777	0
Provision for credit losses														2,410	(679)
Charge-offs														(924)	(1,337)
Recoveries														1,283	34	9
Ending balance		19,380				13,379				12,584				19,380	13,379	12,584
Beginning balance	12,439								12,584				12,439		12,584	12,439
Impact of adoption																(1,163)
Provision for credit losses																1,317
Charge-offs																(18)
Ending balance	11,276									12,584						12,584
Residential Real Estate Portfolio Segment [Member]
Beginning balance					7,993				5,207					7,993	5,207
Initial Allowance on PCD Loans														590	230	99
Provision for credit losses														1,702	2,900
Charge-offs														(57)	(383)
Recoveries														86	39	20
Ending balance		10,314				7,993				5,207				10,314	7,993	5,207
Beginning balance	2,474								5,207				2,474		5,207	2,474
Impact of adoption																1,516
Provision for credit losses																1,179
Charge-offs																(81)
Ending balance	4,089									5,207						5,207
Loans, individually evaluated for impairment		2,614				2,499								2,614	2,499
Allowance for loans, individually evaluated for impairment		338				116								338	116
Residential Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		2,614				2,499								2,614	2,499
Residential Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Residential Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Beginning balance					3,677				1,818					3,677	1,818
Initial Allowance on PCD Loans														0	88	0
Provision for credit losses														(75)	1,766
Charge-offs														(27)	0
Recoveries														22	5	2
Ending balance		3,597				3,677				1,818				3,597	3,677	1,818
Beginning balance	947								1,818				947		1,818	947
Impact of adoption																429
Provision for credit losses																442
Charge-offs																(2)
Ending balance	1,376									1,818						1,818
Loans, individually evaluated for impairment		415				502								415	502
Allowance for loans, individually evaluated for impairment		116				116								116	116
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		415				502								415	502
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Beginning balance					4,316				3,389					4,316	3,389
Initial Allowance on PCD Loans														590	142	99
Provision for credit losses														1,777	1,134
Charge-offs														(30)	(383)
Recoveries														64	34	18
Ending balance		6,717				4,316				3,389				6,717	4,316	3,389
Beginning balance	1,527								3,389				1,527		3,389	1,527
Impact of adoption																1,087
Provision for credit losses																737
Charge-offs																(79)
Ending balance	2,713									3,389						3,389
Loans, individually evaluated for impairment		2,199				1,997								2,199	1,997
Allowance for loans, individually evaluated for impairment		222				0								222	0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		2,199				1,997								2,199	1,997
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Construction and Development [Member]
Beginning balance					4,789				6,119					4,789	6,119
Initial Allowance on PCD Loans														419	0	0
Provision for credit losses														2,050	(1,333)
Charge-offs														(72)	0
Recoveries														0	3	56
Ending balance		7,186				4,789				6,119				7,186	4,789	6,119
Beginning balance	2,105								6,119				2,105		6,119	2,105
Impact of adoption																3,056
Provision for credit losses																902
Charge-offs																0
Ending balance	5,161									6,119						6,119
Loans, individually evaluated for impairment		0				0								0	0
Allowance for loans, individually evaluated for impairment		0				0								0	0
Construction and Development [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		0				0								0	0
Construction and Development [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Construction and Development [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Consumer Portfolio Segment [Member]
Beginning balance					772				340					772	340
Initial Allowance on PCD Loans														78	0	34
Provision for credit losses														750	743
Charge-offs														(1,080)	(987)
Recoveries														638	676	359
Ending balance		1,158				772				340				1,158	772	340
Beginning balance	100								340				100		340	100
Impact of adoption																264
Provision for credit losses																91
Charge-offs																(508)
Ending balance	398									340						340
Loans, individually evaluated for impairment		219				247								219	247
Allowance for loans, individually evaluated for impairment		20				0								20	0
Consumer Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		0				0								0	0
Consumer Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Consumer Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		219				247								219	247
Finance Leases Portfolio Segment [Member]
Beginning balance					204				261					204	261
Initial Allowance on PCD Loans														0	0	0
Provision for credit losses														(3)	(57)
Charge-offs														0	0
Recoveries														0	0	0
Ending balance		201				204				261				201	204	261
Beginning balance	237								261				237		261	237
Impact of adoption																(4)
Provision for credit losses																28
Charge-offs																0
Ending balance	233									261						261
Loans, individually evaluated for impairment		0				0								0	0
Allowance for loans, individually evaluated for impairment		0				0								0	0
Finance Leases Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		0				0								0	0
Finance Leases Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Finance Leases Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Portfolio Segment [Member]
Beginning balance	146												146			146
Ending balance	96
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member]
Beginning balance					$ 162				135					162	135
Initial Allowance on PCD Loans														0	0	0
Provision for credit losses														94	27
Charge-offs														(96)	0
Recoveries														51	0	0
Ending balance		211				162				135				211	162	135
Beginning balance	$ 146								$ 135				$ 146		135	146
Impact of adoption																(50)
Provision for credit losses																39
Charge-offs																0
Ending balance										$ 135						$ 135
Loans, individually evaluated for impairment		0				0								0	0
Allowance for loans, individually evaluated for impairment		0				0								0	0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Real Estate [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment		0				0								0	0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment		$ 0				$ 0								$ 0	$ 0