Note 2 - Loans and Allowance for Credit Losses - Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Loans, gross		$ 864,091	$ 857,175
Loans 90 or more days past due and accruing		162	188
Nonaccruals		2,591	2,629
Nonaccruals, no allowance		2,156	2,177
Nonaccruals, with allowance		435	452
Financial Asset, Not Past Due [Member]
Loans, gross		860,149	852,712
Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	1,189	1,646
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		387	419
Real Estate Construction Portfolio Segment[Member]
Loans, gross		61,486	55,379
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Loans, gross		11,603	13,442
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		11,603	13,442
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
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]
Loans, gross		0	0
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Loans, gross		49,883	41,937
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		49,883	41,916
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	0	21
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Real Estate Construction Portfolio Segment[Member] | Equity Lines [Member]
Loans, gross		17,516	17,282
Commercial Real Estate Portfolio Segment [Member]
Loans, gross		414,615	419,130
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Loans, gross		114,830	117,221
Loans 90 or more days past due and accruing		0	0
Nonaccruals		2,381	2,408
Nonaccruals, no allowance		2,156	2,177
Nonaccruals, with allowance		225	231
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		112,302	114,477
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	147	336
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		225	231
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Loans, gross		118,309	119,247
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		118,309	119,052
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross		0	195
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Loans, gross		181,476	182,662
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		181,476	182,662
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
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]
Loans, gross		0	0
Commercial Non Real Estate Segment [Member]
Loans, gross		41,835	41,555
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Loans, gross		41,835	41,555
Loans 90 or more days past due and accruing		39	28
Nonaccruals		210	221
Nonaccruals, no allowance		0	0
Nonaccruals, with allowance		210	221
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		41,564	41,249
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	22	57
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		39	28
Consumer Real Estate Portfolio Segment [Member]
Loans, gross		244,946	241,564
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Loans, gross		17,516	17,282
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		17,404	17,178
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross		112	104
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Loans, gross		129,805	125,679
Loans 90 or more days past due and accruing		121	131
Nonaccruals		0	0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		129,086	124,886
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	598	662
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		121	131
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Loans, gross		4,943	5,039
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		4,932	5,027
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross		11	12
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Loans, gross		92,682	93,564
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		92,605	93,564
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	77	0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Public Sector and IDA Portfolio Segment[Member]
Loans, gross		59,742	60,551
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Public Sector and IDA Portfolio Segment[Member] | Financial Asset, Not Past Due [Member]
Loans, gross		59,742	60,551
Public Sector and IDA Portfolio Segment[Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross		0	0
Public Sector and IDA Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Consumer Non Real Estate Portfolio Segment [Member]
Loans, gross		41,467	38,996
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans, gross		4,666	4,668
Loans 90 or more days past due and accruing		1	3
Nonaccruals		0	0
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		4,664	4,648
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	1	17
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		1	3
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Loans, gross		12,921	12,261
Loans 90 or more days past due and accruing		0	0
Nonaccruals		0	0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		12,817	12,126
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	104	135
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		0	0
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans, gross		23,880	22,067
Loans 90 or more days past due and accruing		1	26
Nonaccruals		0	0
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Loans, gross		23,762	21,934
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, gross	[1]	117	107
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		$ 1	$ 26

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