Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans and Allowance for Loan Losses by Evaluation Method (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Allowance for loan losses, Individually evaluated for impairment	$ 0	$ 0
Allowance for loan losses, Collectively evaluated for impairment	7,788	7,674
Allowance for loan losses	7,788	7,674	$ 8,536	$ 8,481
Loans	819,774			803,729
Consumer Real Estate Portfolio Segment [Member]
Allowance for loan losses, Individually evaluated for impairment	0	0
Allowance for loan losses, Collectively evaluated for impairment	1,935	1,930
Allowance for loan losses	1,935	1,930	2,366	2,165
Loans, Individually evaluated for impairment	189	191
Non-impaired gross loans	208,883	208,786
Loans	209,072	208,977		208,977
Commercial Non Real Estate Segment [Member]
Allowance for loan losses, Individually evaluated for impairment	0	0
Allowance for loan losses, Collectively evaluated for impairment	944	1,099
Allowance for loan losses	944	1,099	634	670
Loans, Individually evaluated for impairment	287	301
Non-impaired gross loans	52,509	59,963
Loans	52,796	60,264		60,264
Real Estate Construction Portfolio Segment[Member]
Allowance for loan losses, Collectively evaluated for impairment	593	422
Allowance for loan losses	593	422	511	503
Loans, Individually evaluated for impairment	0	0
Non-impaired gross loans	59,741	48,841
Loans	59,741	48,841		48,841
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses, Collectively evaluated for impairment	3,423	3,121
Allowance for loan losses	3,423	3,121	3,862	3,853
Loans, Individually evaluated for impairment	5,358	5,386
Non-impaired gross loans	411,595	400,336
Loans	416,953	405,722		405,722
Public Sector and IDA Portfolio Segment[Member]
Allowance for loan losses, Collectively evaluated for impairment	307	297
Allowance for loan losses	307	297	311	339
Loans, Individually evaluated for impairment	0	0
Non-impaired gross loans	47,156	47,899
Loans	47,156	47,899		47,899
Consumer Non Real Estate Portfolio Segment [Member]
Allowance for loan losses, Collectively evaluated for impairment	415	444
Allowance for loan losses	415	444	496	555
Loans, Individually evaluated for impairment	0	0
Non-impaired gross loans	34,056	32,026
Loans	34,056	32,026		32,026
Unallocated Financing Receivables [Member]
Allowance for loan losses, Collectively evaluated for impairment	171	361
Allowance for loan losses	171	361	$ 356	$ 396
Loans, Individually evaluated for impairment	5,834	5,878
Non-impaired gross loans	813,940	797,851
Loans	$ 819,774	$ 803,729

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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