Note 3 - Loans and Allowance for Credit Losses on Loans - Allowance for Loan Losses by Portfolio Segment and Based on Impairment Evaluation Method (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Beginning balance	$ 75,673	$ 67,067	$ 73,531	$ 53,898
Provision for credit losses	2,150	(700)	4,400	1,979
Charge-offs	(320)	(370)	(690)	(779)
Recoveries	207	365	469	1,314
Ending balance	77,710	66,362	77,710	66,362
Initial Allowance on PCD Loans		0		9,950
Real Estate [Member]
Loans, individually evaluated for impairment	28,196		28,196		$ 22,459
Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	465		465		5,028
Other Collateral [Member]
Loans, individually evaluated for impairment	866		866		219
Collateral Pledged [Member]
Loans, individually evaluated for impairment	29,527		29,527		27,706
Allowance for loans, individually evaluated for impairment	5,594		5,594		5,822
Home Equity Line of Credit [Member]
Beginning balance	1,618	1,467	1,613	1,044
Provision for credit losses	(9)	54	8	475
Charge-offs	0	0	(12)	0
Recoveries	0	0	0	0
Ending balance	1,609	1,521	1,609	1,521
Initial Allowance on PCD Loans		0		2
Home Equity Line of Credit [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	205		205		205
Home Equity Line of Credit [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Home Equity Line of Credit [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Home Equity Line of Credit [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	205		205		205
Allowance for loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	33,098	31,946	33,468	25,555
Provision for credit losses	215	(1,363)	(174)	(634)
Charge-offs	0	(41)	0	(41)
Recoveries	17	23	36	56
Ending balance	33,330	30,565	33,330	30,565
Initial Allowance on PCD Loans		0		5,629
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	17,268		17,268		19,179
Commercial Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	17,268		17,268		19,179
Allowance for loans, individually evaluated for impairment	2,923		2,923		3,498
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Beginning balance	21,669	20,620	22,641	15,960
Provision for credit losses	87	101	(904)	1,242
Charge-offs	0	0	0	0
Recoveries	17	2	36	13
Ending balance	21,773	20,723	21,773	20,723
Initial Allowance on PCD Loans		0		3,508
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	14,094		14,094		14,764
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	14,094		14,094		14,764
Allowance for loans, individually evaluated for impairment	2,081		2,081		2,652
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Beginning balance	11,429	11,326	10,827	9,595
Provision for credit losses	128	(1,464)	730	(1,876)
Charge-offs	0	(41)	0	(41)
Recoveries	0	21	0	43
Ending balance	11,557	9,842	11,557	9,842
Initial Allowance on PCD Loans		0		2,121
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	3,174		3,174		4,415
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	3,174		3,174		4,415
Allowance for loans, individually evaluated for impairment	842		842		846
Commercial and Industrial Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	7,139		7,139		461
Commercial and Industrial Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	465		465		5,028
Commercial and Industrial Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	459		459		0
Commercial and Industrial Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	8,063		8,063		5,489
Allowance for loans, individually evaluated for impairment	2,321		2,321		1,966
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Beginning balance	13,998	11,108	12,991	8,577
Provision for credit losses	851	1,174	1,929	1,741
Charge-offs	(57)	(15)	(128)	(128)
Recoveries	0	75	0	794
Ending balance	14,792	12,342	14,792	12,342
Initial Allowance on PCD Loans		0		1,358
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	4,405		4,405		39
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	306		306		2,207
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	459		459		0
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	5,170		5,170		2,246
Allowance for loans, individually evaluated for impairment	1,571		1,571		1,205
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Beginning balance	6,025	6,508	6,389	4,802
Provision for credit losses	416	(1,508)	(35)	(1,640)
Charge-offs	0	0	0	(36)
Recoveries	62	0	149	0
Ending balance	6,503	5,000	6,503	5,000
Initial Allowance on PCD Loans		0		1,874
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	2,734		2,734		422
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	159		159		2,821
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	2,893		2,893		3,243
Allowance for loans, individually evaluated for impairment	750		750		761
Total Commercial and Industrial Portfolio Segment [Member]
Beginning balance	20,023	17,616	19,380	13,379
Provision for credit losses	1,267	(334)	1,894	101
Charge-offs	(57)	(15)	(128)	(164)
Recoveries	62	75	149	794
Ending balance	21,295	17,342	21,295	17,342
Initial Allowance on PCD Loans		0		3,232
Residential Real Estate Portfolio Segment [Member]
Beginning balance	12,349	8,724	10,314	7,993
Provision for credit losses	686	399	2,710	540
Charge-offs	(43)	(7)	(43)	(13)
Recoveries	12	62	23	68
Ending balance	13,004	9,178	13,004	9,178
Initial Allowance on PCD Loans		0		590
Residential Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	3,584		3,584		2,614
Residential Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Residential Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Residential Real Estate Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	3,584		3,584		2,614
Allowance for loans, individually evaluated for impairment	330		330		338
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Beginning balance	4,144	3,361	3,597	3,677
Provision for credit losses	24	(176)	570	(495)
Charge-offs	0	0	0	0
Recoveries	1	5	2	8
Ending balance	4,169	3,190	4,169	3,190
Initial Allowance on PCD Loans		0		0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	588		588		415
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	588		588		415
Allowance for loans, individually evaluated for impairment	116		116		116
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Beginning balance	8,205	5,363	6,717	4,316
Provision for credit losses	662	575	2,140	1,035
Charge-offs	(43)	(7)	(43)	(13)
Recoveries	11	57	21	60
Ending balance	8,835	5,988	8,835	5,988
Initial Allowance on PCD Loans		0		590
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	2,996		2,996		2,199
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	2,996		2,996		2,199
Allowance for loans, individually evaluated for impairment	214		214		222
Construction and Development [Member]
Beginning balance	6,735	5,864	7,186	4,789
Provision for credit losses	17	422	(434)	1,078
Charge-offs	0	(72)	0	(72)
Recoveries	0	0	0	0
Ending balance	6,752	6,214	6,752	6,214
Initial Allowance on PCD Loans		0		419
Construction and Development [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	0		0		0
Construction and Development [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Construction and Development [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Construction and Development [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	0		0		0
Allowance for loans, individually evaluated for impairment	0		0		0
Consumer Portfolio Segment [Member]
Beginning balance	1,186	1,049	1,158	772
Provision for credit losses	201	141	289	403
Charge-offs	(208)	(235)	(407)	(489)
Recoveries	106	158	245	349
Ending balance	1,285	1,113	1,285	1,113
Initial Allowance on PCD Loans		0		78
Consumer Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	0		0		0
Consumer Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Consumer Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	407		407		219
Consumer Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	407		407		219
Allowance for loans, individually evaluated for impairment	20		20		20
Finance Leases Portfolio Segment [Member]
Beginning balance	199	211	201	204
Provision for credit losses	6	10	4	17
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	205	221	205	221
Initial Allowance on PCD Loans		0		0
Finance Leases Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	0		0		0
Finance Leases Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Finance Leases Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Finance Leases Portfolio Segment [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	0		0		0
Allowance for loans, individually evaluated for impairment	0		0		0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member]
Beginning balance	465	190	211	162
Provision for credit losses	(233)	(29)	103	(1)
Charge-offs	(12)	0	(100)	0
Recoveries	10	47	16	47
Ending balance	230	208	230	208
Initial Allowance on PCD Loans		$ 0		$ 0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member] | Collateral Pledged [Member]
Loans, individually evaluated for impairment	0		0		0
Allowance for loans, individually evaluated for impairment	$ 0		$ 0		$ 0