Note 3 - Loans and Allowance for Credit Losses on Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Beginning balance	$ 88,814	$ 80,897	$ 86,943	$ 79,374	$ 79,374
Loans, individually evaluated for impairment	26,857		26,857		30,898
Provision for credit losses	2,250	1,075	3,150	2,250
Charge-offs	(553)	(347)	(1,167)	(609)	(2,776)
Recoveries	211	530	1,796	1,140
Ending balance	90,722	82,155	90,722	82,155	86,943
Allowance for loans, individually evaluated for impairment	5,948		5,948		3,848
Real Estate [Member]
Loans, individually evaluated for impairment	25,409		25,409		26,204
Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	566		566		4,262
Other Collateral [Member]
Loans, individually evaluated for impairment	882		882		432
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	26,455	33,053	24,127	33,800	33,800
Loans, individually evaluated for impairment	15,574		15,574		15,246
Provision for credit losses	849	(10,364)	3,159	(11,131)
Charge-offs	(38)	0	(38)	0
Recoveries	8	62	26	82
Ending balance	27,274	22,751	27,274	22,751	24,127
Allowance for loans, individually evaluated for impairment	2,604		2,604		1,839
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	15,574		15,574		15,246
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 and Industrial Portfolio Segment [Member]
Beginning balance	28,306	20,174	27,780	20,854	20,854
Loans, individually evaluated for impairment	2,282		2,282		5,427
Provision for credit losses	369	7,045	(262)	5,931
Charge-offs	(82)	(67)	(342)	(90)
Recoveries	25	302	1,442	759
Ending balance	28,618	27,454	28,618	27,454	27,780
Allowance for loans, individually evaluated for impairment	1,297		1,297		655
Commercial and Industrial Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	1,189		1,189		1,089
Commercial and Industrial Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	566		566		4,262
Commercial and Industrial Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	527		527		76
Residential Real Estate Portfolio Segment [Member]
Beginning balance	17,925	16,557	19,622	13,598	13,598
Loans, individually evaluated for impairment	7,285		7,285		9,488
Provision for credit losses	876	1,018	(774)	3,976
Charge-offs	(3)	(7)	(53)	(21)
Recoveries	54	5	57	20
Ending balance	18,852	17,573	18,852	17,573	19,622
Allowance for loans, individually evaluated for impairment	2,021		2,021		1,300
Residential Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	7,285		7,285		9,488
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
Construction and Development [Member]
Beginning balance	11,387	7,459	10,981	7,593	7,593
Loans, individually evaluated for impairment	1,361		1,361		311
Provision for credit losses	(253)	2,570	153	2,436
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Ending balance	11,134	10,029	11,134	10,029	10,981
Allowance for loans, individually evaluated for impairment	0		0		20
Construction and Development [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	1,361		1,361		311
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
Consumer Portfolio Segment [Member]
Beginning balance	2,844	1,500	2,531	1,407	1,407
Loans, individually evaluated for impairment	355		355		356
Provision for credit losses	293	1,108	696	1,300
Charge-offs	(377)	(203)	(580)	(413)	(785)
Recoveries	117	147	230	258
Ending balance	2,877	2,552	2,877	2,552	2,531
Allowance for loans, individually evaluated for impairment	26		26		34
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	355		355		356
Finance Leases Portfolio Segment [Member]
Beginning balance	341	232	370	220	220
Loans, individually evaluated for impairment	0		0		0
Provision for credit losses	49	179	20	191
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0
Ending balance	390	411	390	411	370
Allowance for loans, individually evaluated for impairment	0		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
Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Beginning balance	14,616	21,823	13,935	22,133	22,133
Loans, individually evaluated for impairment	10,611		10,611		11,699
Provision for credit losses	654	(8,808)	1,317	(9,134)
Charge-offs	0	0	0	0	0
Recoveries	8	17	26	33
Ending balance	15,278	13,032	15,278	13,032	13,935
Allowance for loans, individually evaluated for impairment	1,760		1,760		1,075
Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	10,611		10,611		11,699
Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Non-owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Beginning balance	4,487	4,731	5,154	4,282	4,282
Loans, individually evaluated for impairment	2,028		2,028		2,974
Provision for credit losses	103	(483)	(564)	(34)
Charge-offs	(3)	0	(3)	0	0
Recoveries	0	0	0	0
Ending balance	4,587	4,248	4,587	4,248	5,154
Allowance for loans, individually evaluated for impairment	753		753		852
Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	2,028		2,028		2,974
Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Non-owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member]
Beginning balance	11,839	11,230	10,192	11,667	11,667
Loans, individually evaluated for impairment	4,963		4,963		3,547
Provision for credit losses	195	(1,556)	1,842	(1,997)
Charge-offs	(38)	0	(38)	0	0
Recoveries	0	45	0	49
Ending balance	11,996	9,719	11,996	9,719	10,192
Allowance for loans, individually evaluated for impairment	844		844		764
Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	4,963		4,963		3,547
Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Owner Occupied [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member]
Beginning balance	13,438	11,826	14,468	9,316	9,316
Loans, individually evaluated for impairment	5,257		5,257		6,514
Provision for credit losses	773	1,501	(210)	4,010
Charge-offs	0	(7)	(50)	(21)	(356)
Recoveries	54	5	57	20
Ending balance	14,265	13,325	14,265	13,325	14,468
Allowance for loans, individually evaluated for impairment	1,268		1,268		448
Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	5,257		5,257		6,514
Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Owner Occupied [Member] | Residential Real Estate Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	0		0		0
Term [Member] | Commercial and Industrial Portfolio Segment [Member]
Beginning balance	21,677	13,916	21,284	14,359	14,359
Loans, individually evaluated for impairment	1,311		1,311		4,878
Provision for credit losses	(943)	7,478	(1,707)	6,805
Charge-offs	(82)	(67)	(342)	(90)	(748)
Recoveries	25	302	1,442	555
Ending balance	20,677	21,629	20,677	21,629	21,284
Allowance for loans, individually evaluated for impairment	715		715		516
Term [Member] | Commercial and Industrial Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	869		869		740
Term [Member] | Commercial and Industrial Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	366		366		4,062
Term [Member] | Commercial and Industrial Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	76		76		76
Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member]
Beginning balance	6,629	6,258	6,496	6,495	6,495
Loans, individually evaluated for impairment	971		971		549
Provision for credit losses	1,312	(433)	1,445	(874)
Charge-offs	0	0	0	0	(555)
Recoveries	0	0	0	204
Ending balance	7,941	5,825	7,941	5,825	6,496
Allowance for loans, individually evaluated for impairment	582		582		139
Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	320		320		349
Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	200		200		200
Lines of Credit [Member] | Commercial and Industrial Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	451		451		0
Home Equity Line of Credit [Member]
Beginning balance	1,280	1,666	1,277	1,660	1,660
Loans, individually evaluated for impairment	0		0		70
Provision for credit losses	63	(519)	76	(515)
Charge-offs	0	0	(10)	0
Recoveries	0	0	0	2
Ending balance	1,343	1,147	1,343	1,147	1,277
Allowance for loans, individually evaluated for impairment	0		0		0
Home Equity Line of Credit [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	0		0		70
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
Credit Card Receivable [Member] | Commercial Portfolio Segment [Member]
Beginning balance	276	256	255	242	242
Loans, individually evaluated for impairment	0		0		0
Provision for credit losses	4	38	82	62
Charge-offs	(53)	(70)	(144)	(85)	(225)
Recoveries	7	14	41	19
Ending balance	234	$ 238	234	$ 238	255
Allowance for loans, individually evaluated for impairment	0		0		0
Credit Card Receivable [Member] | Commercial Portfolio Segment [Member] | Real Estate [Member]
Loans, individually evaluated for impairment	0		0		0
Credit Card Receivable [Member] | Commercial Portfolio Segment [Member] | Accounts Receivable and Equipment [Member]
Loans, individually evaluated for impairment	0		0		0
Credit Card Receivable [Member] | Commercial Portfolio Segment [Member] | Other Collateral [Member]
Loans, individually evaluated for impairment	$ 0		$ 0		$ 0