Note 2 - Loans and Allowance for Credit Losses - Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Gross loans		$ 849,417	$ 853,193
Loans 90 or more days past due and accruing		31	8
Nonaccruals		2,981	2,847
Loans, gross		849,417	853,193
Nonaccruals, no allowance		0
Nonaccruals, with allowance		2,981
Financial Asset, Not Past Due [Member]
Gross loans		845,233	848,950
Loans, gross		845,233	848,950
Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	1,172	1,388
Loans, gross	[1]	1,172	1,388
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		588	351
Loans, gross		588	351
Real Estate Construction Portfolio Segment[Member]
Gross loans		64,181	54,579
Loans, gross		64,181	54,579
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Gross loans		16,995	12,538
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		16,995	12,538
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financial Asset, Not Past Due [Member]
Gross loans		16,995	12,538
Loans, gross		16,995	12,538
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Gross loans		47,186	42,041
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		47,186	42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financial Asset, Not Past Due [Member]
Gross loans		47,165	42,041
Loans, gross		47,165	42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	21	0
Loans, gross	[1]	21	0
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Real Estate Construction Portfolio Segment[Member] | Equity Lines [Member]
Gross loans		16,654
Loans, gross		16,654
Consumer Real Estate Portfolio Segment [Member]
Gross loans		226,671	221,052
Loans, gross		226,671	221,052
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Gross loans		123,610	122,648
Loans 90 or more days past due and accruing		7	0
Nonaccruals		85	91
Loans, gross		123,610	122,648
Nonaccruals, no allowance		0
Nonaccruals, with allowance		85
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financial Asset, Not Past Due [Member]
Gross loans		122,839	121,807
Loans, gross		122,839	121,807
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	679	750
Loans, gross	[1]	679	750
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		92	91
Loans, gross		92	91
Consumer Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Gross loans		118,806
Loans, gross		118,806
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Gross loans		16,654	15,026
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		16,654	15,026
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Not Past Due [Member]
Gross loans		16,631	15,010
Loans, gross		16,631	15,010
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		23	16
Loans, gross		23	16
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Gross loans		5,022	2,446
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		5,022	2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financial Asset, Not Past Due [Member]
Gross loans		5,009	2,446
Loans, gross		5,009	2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		13	0
Loans, gross		13	0
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Gross loans		81,385	80,932
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		81,385	80,932
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financial Asset, Not Past Due [Member]
Gross loans		81,385	80,524
Loans, gross		81,385	80,524
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	0	408
Loans, gross	[1]	0	408
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Commercial Real Estate Portfolio Segment [Member]
Gross loans		424,765	437,888
Loans, gross		424,765	437,888
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Gross loans		118,806	129,133
Loans 90 or more days past due and accruing		0	0
Nonaccruals		2,429	2,493
Loans, gross		118,806	129,133
Nonaccruals, no allowance		0
Nonaccruals, with allowance		2,429
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Gross loans		116,089	126,640
Loans, gross		116,089	126,640
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	288	0
Loans, gross	[1]	288	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		236	252
Loans, gross		236	252
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Gross loans		133,188	127,312
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		133,188	127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financial Asset, Not Past Due [Member]
Gross loans		133,188	127,312
Loans, gross		133,188	127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Gross loans		172,771	181,443
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		172,771	181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financial Asset, Not Past Due [Member]
Gross loans		172,771	181,443
Loans, gross		172,771	181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Commercial Non Real Estate Segment [Member]
Gross loans		42,940	57,652
Loans, gross		42,940	57,652
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Gross loans		42,940	57,652
Loans 90 or more days past due and accruing		17	0
Nonaccruals		467	263
Loans, gross		42,940	57,652
Nonaccruals, no allowance		0
Nonaccruals, with allowance		467
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member]
Gross loans		42,452	57,373
Loans, gross		42,452	57,373
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	4	16
Loans, gross	[1]	4	16
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		252	0
Loans, gross		252	0
Public Sector and IDA Portfolio Segment[Member]
Gross loans		51,591	48,074
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		51,591	48,074
Public Sector and IDA Portfolio Segment[Member] | Financial Asset, Not Past Due [Member]
Gross loans		51,591	48,074
Loans, gross		51,591	48,074
Public Sector and IDA Portfolio Segment[Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Public Sector and IDA Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	0
Consumer Non Real Estate Portfolio Segment [Member]
Gross loans		39,269	33,948
Loans, gross		39,269	33,948
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Gross loans		4,574	4,597
Loans 90 or more days past due and accruing		0	2
Nonaccruals		0	0
Loans, gross		4,574	4,597
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financial Asset, Not Past Due [Member]
Gross loans		4,570	4,592
Loans, gross		4,570	4,592
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	4	3
Loans, gross	[1]	4	3
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	2
Loans, gross		0	2
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Gross loans		11,977	9,935
Loans 90 or more days past due and accruing		2	0
Nonaccruals		0	0
Loans, gross		11,977	9,935
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Not Past Due [Member]
Gross loans		11,933	9,833
Loans, gross		11,933	9,833
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	42	102
Loans, gross	[1]	42	102
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		3	0
Loans, gross		3	0
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Gross loans		22,718	19,416
Loans 90 or more days past due and accruing		5	6
Nonaccruals		0	0
Loans, gross		22,718	19,416
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Gross loans		22,615	19,317
Loans, gross		22,615	19,317
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	98	93
Loans, gross	[1]	98	93
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		5	6
Loans, gross		$ 5	$ 6

[1] Includes accruing and nonaccrual loans past due 90 days or more.