Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Gross loans		$ 853,193	$ 803,729
Nonaccruals	[1],[2]	2,847	2,873
Loans past due 90 days or more and still accruing	[2]	8	90
Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	1,388	987
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans	[2]	351	356
Consumer Real Estate Portfolio Segment [Member]
Gross loans		221,052	208,977
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Nonaccruals	[1],[2]		0
Loans past due 90 days or more and still accruing	[2]		29
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	16	50
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans	[2]	0	29
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Nonaccruals	[1],[2]	91	0
Loans past due 90 days or more and still accruing	[2]		58
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	750	715
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	[2]	91	58
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	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	[2]	0
Real Estate Construction Portfolio Segment[Member]
Gross loans		54,579	48,841
Nonaccruals	[1],[2]		0
Loans past due 90 days or more and still accruing	[2]		0
Real Estate Construction Portfolio Segment[Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]		14
Real Estate Construction Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans	[2]		0
Commercial Real Estate Portfolio Segment [Member]
Gross loans		437,888	405,722
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Nonaccruals	[1],[2]	2,493	2,572
Loans past due 90 days or more and still accruing	[2]		0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	0	12
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	[2]	252	266
Commercial Non Real Estate Segment [Member]
Gross loans		57,652	60,264
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Nonaccruals	[1],[2]	263	301
Loans past due 90 days or more and still accruing	[2]		0
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	16	13
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans	[2]	0	0
Consumer Non Real Estate Portfolio Segment [Member]
Gross loans		33,948	32,026
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Nonaccruals	[1],[2]		0
Loans past due 90 days or more and still accruing	[2]	2	2
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	3	2
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	[2]	2	2
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Nonaccruals	[1],[2]		0
Loans past due 90 days or more and still accruing	[2]		0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	102	93
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans	[2]	0	0
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Nonaccruals	[1],[2]		0
Loans past due 90 days or more and still accruing	[2]	6	1
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Gross loans	[2]	93	88
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	[2]	$ 6	$ 1

[1] Includes current and past due loans in nonaccrual status. Includes impaired loans in nonaccrual status.

[2] Only classes with past due or nonaccrual loans are presented.