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Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans and Allowance for Loan Losses by Evaluation Method (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Allowance for loan losses, Individually evaluated for impairment	$ 0	$ 75
Allowance for loan losses, Collectively evaluated for impairment	8,077	8,406
Allowance for loan losses	8,077	8,481	$ 8,308	$ 6,863
Loans	807,206	770,027
Consumer Real Estate Portfolio Segment [Member]
Allowance for loan losses, Individually evaluated for impairment	0	2
Allowance for loan losses, Collectively evaluated for impairment	2,008	2,163
Allowance for loan losses	2,008	2,165	2,266	1,895
Loans, Individually evaluated for impairment	192	194
Loans, Collectively evaluated for impairment	196,022	181,588
Loans	196,214	181,782
Commercial Non Real Estate Segment [Member]
Allowance for loan losses, Individually evaluated for impairment	0	73
Allowance for loan losses, Collectively evaluated for impairment	867	597
Allowance for loan losses	867	670	666	555
Loans, Individually evaluated for impairment	316	851
Loans, Collectively evaluated for impairment	73,206	77,920
Loans	73,522	78,771
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses, Individually evaluated for impairment		0
Allowance for loan losses, Collectively evaluated for impairment	3,451	3,853
Allowance for loan losses	3,451	3,853	3,376	2,559
Loans, Individually evaluated for impairment	6,265	3,856
Loans, Collectively evaluated for impairment	398,371	389,259
Loans	404,636	393,115
Consumer Non Real Estate Portfolio Segment [Member]
Allowance for loan losses, Individually evaluated for impairment		0
Allowance for loan losses, Collectively evaluated for impairment	517	555
Allowance for loan losses	517	555	657	650
Loans, Individually evaluated for impairment	1	2
Loans, Collectively evaluated for impairment	31,894	33,108
Loans	31,895	33,110
Real Estate Construction Portfolio Segment[Member]
Allowance for loan losses, Collectively evaluated for impairment	485	503
Allowance for loan losses	485	503	385	400
Loans, Individually evaluated for impairment	0	0
Loans, Collectively evaluated for impairment	48,569	42,266
Loans	48,569	42,266
Public Sector and IDA Portfolio Segment[Member]
Allowance for loan losses, Collectively evaluated for impairment	376	339
Allowance for loan losses	376	339	563	478
Loans, Individually evaluated for impairment	0	0
Loans, Collectively evaluated for impairment	52,370	40,983
Loans	52,370	40,983
Unallocated Financing Receivables [Member]
Allowance for loan losses, Collectively evaluated for impairment	373	396
Allowance for loan losses	373	396	$ 395	$ 326
Loans, Individually evaluated for impairment	6,774	4,903
Loans, Collectively evaluated for impairment	800,432	765,124
Loans	$ 807,206	$ 770,027

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

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-Topic 310
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-URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 2
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