Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Real Estate Construction Portfolio Segment[Member]
Loans, Collectively evaluated for impairment		$ 48,569	$ 42,266
Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		196,022	181,588
Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		398,371	389,259
Commercial Non Real Estate Segment [Member]
Loans, Collectively evaluated for impairment		73,206	77,920
Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		31,894	33,108
Pass [Member]
Loans, Collectively evaluated for impairment	[1]	794,538	756,616
Pass [Member] | States Political Subdivisions [Member]
Loans, Collectively evaluated for impairment		52,370	40,983
Special Mention [Member]
Loans, Collectively evaluated for impairment	[1]	5,276	8,035
Classified Excluding Impaired [Member]
Loans, Collectively evaluated for impairment	[1]	618	473
Construction, 1-4 Family Residential [Member] | Pass [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, Collectively evaluated for impairment	[1]	10,213	8,195
Construction, Other [Member] | Pass [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, Collectively evaluated for impairment	[1]	38,356	34,071
Equity Lines [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	13,071	13,903
Closed End First Liens [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		102,692	92,241	[1]
Closed End First Liens [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		64	66	[1]
Closed End First Liens [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		243	284	[1]
Closed End Junior Liens [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment		2,985	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]	76,341	71,450
Investor Owned Residential Real Estate [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	626	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]	104,507	87,455
Multifamily Real Estate [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	258	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]	139,144	146,900
Commercial Real Estate, Owner Occupied [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	542	543
Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	176	140
Commercial Real Estate Other [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	149,958	147,436
Commercial Real Estate Other [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	3,786	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]	73,118	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]	88	28
Credit Card Receivable [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	4,359	4,665
Automobile Loan [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	11,585	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]	15,839	16,398
Other Consumer Loans [Member] | Classified Excluding Impaired [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, Collectively evaluated for impairment	[1]	$ 111	$ 15

[1] Excludes impaired, if any.