Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Real Estate Construction Portfolio Segment[Member]
Loans, Collectively evaluated for impairment		$ 50,883	$ 42,266
Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		204,688	181,588
Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		398,257	389,259
Commercial Non Real Estate Segment [Member]
Loans, Collectively evaluated for impairment		58,774	77,920
Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		31,575	33,108
Pass [Member]
Loans, Collectively evaluated for impairment	[1]	787,654	756,616
Pass [Member] | States Political Subdivisions [Member]
Loans, Collectively evaluated for impairment		48,345	40,983
Special Mention [Member]
Loans, Collectively evaluated for impairment	[1]	4,376	8,035
Classified Excluding Impaired [Member]
Loans, Collectively evaluated for impairment	[1]	492	473
Construction, 1-4 Family Residential [Member] | Pass [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, Collectively evaluated for impairment	[1]	10,498	8,195
Construction, Other [Member] | Pass [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, Collectively evaluated for impairment	[1]	40,385	34,071
Equity Lines [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	13,962	13,903
Closed End First Liens [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		106,806	92,241	[1]
Closed End First Liens [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		0	66	[1]
Closed End First Liens [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		284	284	[1]
Closed End Junior Liens [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		2,773	3,003	[1]
Closed End Junior Liens [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		0	0	[1]
Closed End Junior Liens [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		0	0	[1]
Investor Owned Residential Real Estate [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	80,244	71,450
Investor Owned Residential Real Estate [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	619	641
Investor Owned Residential Real Estate [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]		0
Multifamily Real Estate [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	106,368	87,455
Multifamily Real Estate [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	0	265
Multifamily Real Estate [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]		0
Commercial Real Estate, Owner Occupied [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	137,965	146,900
Commercial Real Estate, Owner Occupied [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	0	543
Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	36	140
Commercial Real Estate Other [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	150,131	147,436
Commercial Real Estate Other [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	3,757	6,520
Commercial Real Estate Other [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]		0
Commercial and Industrial [Member] | Pass [Member] | Commercial Non Real Estate Segment [Member]
Loans, Collectively evaluated for impairment	[1]	58,726	77,892
Commercial and Industrial [Member] | Special Mention [Member] | Commercial Non Real Estate Segment [Member]
Loans, Collectively evaluated for impairment	[1]		0
Commercial and Industrial [Member] | Classified Excluding Impaired [Member] | Commercial Non Real Estate Segment [Member]
Loans, Collectively evaluated for impairment	[1]	48	28
Credit Card Receivable [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	4,270	4,665
Automobile Loan [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	11,653	12,024
Automobile Loan [Member] | Classified Excluding Impaired [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	0	6
Other Consumer Loans [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	15,528	16,398
Other Consumer Loans [Member] | Classified Excluding Impaired [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	$ 124	$ 15

[1] Excludes impaired, if any.