Note 2 - Loans and Allowance for Credit Losses - Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Gross loans		$ 846,939	$ 853,193
Loans 90 or more days past due and accruing		21	8
Nonaccruals		3,075	2,847
Loans, gross		846,939	853,193
Nonaccruals, no allowance		0
Nonaccruals, with allowance		3,075
Financial Asset, Not Past Due [Member]
Gross loans		842,634	848,950
Loans, gross		842,634	848,950
Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	1,209	1,388
Loans, gross	[1]	1,209	1,388
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		350	351
Loans, gross		350	351
Real Estate Construction Portfolio Segment[Member]
Gross loans		56,984	54,579
Loans, gross		56,984	54,579
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Gross loans		14,094	12,538
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		14,094	12,538
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financial Asset, Not Past Due [Member]
Gross loans		14,094	12,538
Loans, gross		14,094	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		42,890	42,041
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		42,890	42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financial Asset, Not Past Due [Member]
Gross loans		42,890	42,041
Loans, gross		42,890	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		226,453	221,052
Loans, gross		226,453	221,052
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Gross loans		124,441	122,648
Loans 90 or more days past due and accruing		7	0
Nonaccruals		87	91
Loans, gross		124,441	122,648
Nonaccruals, no allowance		0
Nonaccruals, with allowance		87
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financial Asset, Not Past Due [Member]
Gross loans		123,820	121,807
Loans, gross		123,820	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]	527	750
Loans, gross	[1]	527	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		94	91
Loans, gross		94	91
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Gross loans		15,362	15,026
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		15,362	15,026
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Not Past Due [Member]
Gross loans		15,312	15,010
Loans, gross		15,312	15,010
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans		50	16
Loans, gross		50	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		4,085	2,446
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		4,085	2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financial Asset, Not Past Due [Member]
Gross loans		4,085	2,446
Loans, gross		4,085	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		82,565	80,932
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		82,565	80,932
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financial Asset, Not Past Due [Member]
Gross loans		82,243	80,524
Loans, gross		82,243	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]	322	408
Loans, gross	[1]	322	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		423,396	437,888
Loans, gross		423,396	437,888
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Gross loans		118,344	129,133
Loans 90 or more days past due and accruing		0	0
Nonaccruals		2,446	2,493
Loans, gross		118,344	129,133
Nonaccruals, no allowance		0
Nonaccruals, with allowance		2,446
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Gross loans		115,752	126,640
Loans, gross		115,752	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]	146	0
Loans, gross	[1]	146	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		242	252
Loans, gross		242	252
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Gross loans		131,192	127,312
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		131,192	127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financial Asset, Not Past Due [Member]
Gross loans		131,192	127,312
Loans, gross		131,192	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		173,860	181,443
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		173,860	181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financial Asset, Not Past Due [Member]
Gross loans		173,860	181,443
Loans, gross		173,860	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		56,079	57,652
Loans, gross		56,079	57,652
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Gross loans		56,079	57,652
Loans 90 or more days past due and accruing		1	0
Nonaccruals		542	263
Loans, gross		56,079	57,652
Nonaccruals, no allowance		0
Nonaccruals, with allowance		542
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member]
Gross loans		55,517	57,373
Loans, gross		55,517	57,373
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	19	16
Loans, gross	[1]	19	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		1	0
Loans, gross		1	0
Public Sector and IDA Portfolio Segment[Member]
Gross loans		47,791	48,074
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		47,791	48,074
Public Sector and IDA Portfolio Segment[Member] | Financial Asset, Not Past Due [Member]
Gross loans		47,791	48,074
Loans, gross		47,791	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		36,236	33,948
Loans, gross		36,236	33,948
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Gross loans		4,653	4,597
Loans 90 or more days past due and accruing		10	2
Nonaccruals		0	0
Loans, gross		4,653	4,597
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financial Asset, Not Past Due [Member]
Gross loans		4,637	4,592
Loans, gross		4,637	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]	6	3
Loans, gross	[1]	6	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		10	2
Loans, gross		10	2
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Gross loans		11,573	9,935
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Loans, gross		11,573	9,935
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Not Past Due [Member]
Gross loans		11,539	9,833
Loans, gross		11,539	9,833
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[1]	34	102
Loans, gross	[1]	34	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		20,010	19,416
Loans 90 or more days past due and accruing		3	6
Nonaccruals		0	0
Loans, gross		20,010	19,416
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Gross loans		19,902	19,317
Loans, gross		19,902	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]	105	93
Loans, gross	[1]	105	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		3	6
Loans, gross		$ 3	$ 6

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