Note 3 - Loans and Allowance for Credit Losses - Activity in Allowance for Loan Losses and the Recorded Investments in Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 42,246	$ 35,363	$ 37,967
Provision for credit losses	7,700	6,550	(4,300)
Charge-offs	(863)	(292)	(1,044)
Recoveries	831	1,025	2,740
Balance	49,914	42,246	35,363
Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	0
Balance		0
Revision of Prior Period, After Reclassification [Member]
Balance	42,246
Balance		42,246
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(400)
Balance			(400)
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Balance	10,203	10,782	9,424
Provision for credit losses	(2,822)	946	2,030
Charge-offs	(218)	(171)	(882)
Recoveries	188	217	210
Balance	7,441	10,203	10,782
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	90
Balance		90
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	10,293
Balance		10,293
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(1,571)
Balance			(1,571)
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Balance	490	420	679
Provision for credit losses	(141)	138	(618)
Charge-offs	0	(29)	(15)
Recoveries	35	4	374
Balance	384	490	420
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	0
Balance		0
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	490
Balance		490
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(43)
Balance			(43)
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Balance	5,914	6,045	8,246
Provision for credit losses	1,255	378	(3,308)
Charge-offs	(54)	(38)	(12)
Recoveries	71	89	1,119
Balance	7,186	5,914	6,045
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	0
Balance		0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	5,914
Balance		5,914
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(560)
Balance			(560)
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Balance	9,242	12,990	13,611
Provision for credit losses	610	(1,214)	(621)
Charge-offs	0	0	0
Recoveries	0	0	0
Balance	9,852	9,242	12,990
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	0
Balance		0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	9,242
Balance		9,242
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(2,534)
Balance			(2,534)
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Balance	2,191	2,006	1,819
Provision for credit losses	967	763	161
Charge-offs	0	0	0
Recoveries	26	43	26
Balance	3,184	2,191	2,006
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	0
Balance		0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	2,191
Balance		2,191
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(621)
Balance			(621)
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Balance	14,027	2,449	3,240
Provision for credit losses	5,638	5,621	(1,629)
Charge-offs	(414)	(33)	(92)
Recoveries	432	595	930
Balance	18,986	14,027	2,449
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	(697)
Balance		(697)
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	13,330
Balance		13,330
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		5,395
Balance			5,395
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Balance	160	626
Provision for credit losses	2,212	(111)
Charge-offs	(177)	(21)
Recoveries	79	77
Balance	2,881	160	626
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	607
Balance		607
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	767
Balance		767
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		(411)
Balance			(411)
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
Balance		626	889
Provision for credit losses			(301)
Charge-offs			(43)
Recoveries			81
Balance			626
Unallocated Financing Receivables [Member]
Balance	19	45	59
Provision for credit losses	(19)	29	(14)
Charge-offs	0	0	0
Recoveries	0	0	0
Balance	0	19	45
Unallocated Financing Receivables [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Balance	0
Balance		0
Unallocated Financing Receivables [Member] | Revision of Prior Period, After Reclassification [Member]
Balance	$ 19
Balance		19
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		$ (55)
Balance			$ (55)