Note 2 - Loans and Allowance for Credit Losses - Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Gross loans		$ 857,396	$ 853,193
Loans 90 or more days past due and accruing		33	8
Nonaccruals		2,814	2,847
Loans, gross		857,396	853,193
Nonaccruals, no allowance		0
Nonaccruals, with allowance		2,814
Financial Asset, Not Past Due [Member]
Gross loans		853,375	848,950
Loans, gross		853,375	848,950
Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	1,174	1,388
Loans, gross	[1]	1,174	1,388
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		370	351
Loans, gross		370	351
Real Estate Construction Portfolio Segment[Member]
Gross loans		54,052	54,579
Loans, gross		54,052	54,579
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Gross loans		13,143	12,538
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		13,143	12,538
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financial Asset, Not Past Due [Member]
Gross loans		13,143	12,538
Loans, gross		13,143	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		40,909	42,041
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		40,909	42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financial Asset, Not Past Due [Member]
Gross loans		40,909	42,041
Loans, gross		40,909	42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	0	0
Loans, gross	[1]	0	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
Consumer Real Estate Portfolio Segment [Member]
Gross loans		223,438	221,052
Loans, gross		223,438	221,052
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Gross loans		122,419	122,648
Loans 90 or more days past due and accruing		27	0
Nonaccruals		90	91
Loans, gross		122,419	122,648
Nonaccruals, no allowance		0
Nonaccruals, with allowance		90
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financial Asset, Not Past Due [Member]
Gross loans		121,466	121,807
Loans, gross		121,466	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]	836	750
Loans, gross	[1]	836	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		117	91
Loans, gross		117	91
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Gross loans		14,526	15,026
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		14,526	15,026
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Not Past Due [Member]
Gross loans		14,503	15,010
Loans, gross		14,503	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		2,476	2,446
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		2,476	2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financial Asset, Not Past Due [Member]
Gross loans		2,476	2,446
Loans, gross		2,476	2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		0	0
Loans, gross		0	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		84,017	80,932
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		84,017	80,932
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financial Asset, Not Past Due [Member]
Gross loans		83,924	80,524
Loans, gross		83,924	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]	93	408
Loans, gross	[1]	93	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		438,843	437,888
Loans, gross		438,843	437,888
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Gross loans		127,362	129,133
Loans 90 or more days past due and accruing		0	0
Nonaccruals		2,472	2,493
Loans, gross		127,362	129,133
Nonaccruals, no allowance		0
Nonaccruals, with allowance		2,472
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Gross loans		124,882	126,640
Loans, gross		124,882	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]	8	0
Loans, gross	[1]	8	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		247	252
Loans, gross		247	252
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Gross loans		131,952	127,312
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		131,952	127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financial Asset, Not Past Due [Member]
Gross loans		131,952	127,312
Loans, gross		131,952	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		179,529	181,443
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		179,529	181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financial Asset, Not Past Due [Member]
Gross loans		179,529	181,443
Loans, gross		179,529	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		1	0
Loans, gross		1	0
Commercial Non Real Estate Segment [Member]
Gross loans		60,516	57,652
Loans, gross		60,516	57,652
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Gross loans		60,516	57,652
Loans 90 or more days past due and accruing		1	0
Nonaccruals		252	263
Loans, gross		60,516	57,652
Nonaccruals, no allowance		0
Nonaccruals, with allowance		252
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member]
Gross loans		60,201	57,373
Loans, gross		60,201	57,373
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	62	16
Loans, gross	[1]	62	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		0	0
Loans, gross		0	0
Public Sector and IDA Portfolio Segment[Member]
Gross loans		47,359	48,074
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		47,359	48,074
Public Sector and IDA Portfolio Segment[Member] | Financial Asset, Not Past Due [Member]
Gross loans		47,359	48,074
Loans, gross		47,359	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		33,188	33,948
Loans, gross		33,188	33,948
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Gross loans		4,563	4,597
Loans 90 or more days past due and accruing		1	2
Nonaccruals		0	0
Loans, gross		4,563	4,597
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financial Asset, Not Past Due [Member]
Gross loans		4,557	4,592
Loans, gross		4,557	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]	5	3
Loans, gross	[1]	5	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		1	2
Loans, gross		1	2
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Gross loans		10,403	9,935
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		10,403	9,935
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Not Past Due [Member]
Gross loans		10,328	9,833
Loans, gross		10,328	9,833
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	75	102
Loans, gross	[1]	75	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		0	0
Loans, gross		0	0
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Gross loans		18,222	19,416
Loans 90 or more days past due and accruing		4	6
Nonaccruals		0	0
Loans, gross		18,222	19,416
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Gross loans		18,146	19,317
Loans, gross		18,146	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]	72	93
Loans, gross	[1]	72	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		4	6
Loans, gross		$ 4	$ 6

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