Note 3 - Loans and Allowance for Loan Losses - Recorded Investments in Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Principal loan balance	$ 511,039	$ 488,246
Accrued interest receivable	1,473	1,460
Net deferred loan origination fees and costs	1,156	1,124
Recorded investment in loans	513,668	490,830
Individually evaluated for impairment	1,979	2,315
Collectively evaluated for impairment	511,412	488,234
Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	277	281
Commercial Portfolio Segment [Member]
Principal loan balance	58,031	51,787
Accrued interest receivable	163	180
Net deferred loan origination fees and costs	(21)	(46)
Recorded investment in loans	58,173	51,921
Individually evaluated for impairment	167	174
Collectively evaluated for impairment	58,006	51,747
Commercial Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	137,762	130,603
Accrued interest receivable	468	442
Net deferred loan origination fees and costs	99	107
Recorded investment in loans	138,329	131,152
Individually evaluated for impairment	824	1,034
Collectively evaluated for impairment	137,236	129,848
Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	269	270
Land Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	19,489	19,478
Accrued interest receivable	103	103
Net deferred loan origination fees and costs	13	13
Recorded investment in loans	19,605	19,594
Individually evaluated for impairment	102	102
Collectively evaluated for impairment	19,503	19,492
Land Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Construction Loans [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	31,702	33,439
Accrued interest receivable	74	67
Net deferred loan origination fees and costs	(11)	(15)
Recorded investment in loans	31,765	33,491
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	31,765	33,491
Construction Loans [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Commercial Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member]
Principal loan balance	148,492	137,915
Accrued interest receivable	300	290
Net deferred loan origination fees and costs	(72)	(64)
Recorded investment in loans	148,720	138,141
Individually evaluated for impairment	599	702
Collectively evaluated for impairment	148,113	137,428
Commercial Real Estate Loan [Member] \| Real Estate Mortgage Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	8	11
Home Equity and Second Mortgage [Member] \| Consumer Portfolio Segment [Member]
Principal loan balance	55,893	54,453
Accrued interest receivable	166	160
Net deferred loan origination fees and costs	1,148	1,129
Recorded investment in loans	57,207	55,742
Individually evaluated for impairment	287	303
Collectively evaluated for impairment	56,920	55,439
Home Equity and Second Mortgage [Member] \| Consumer Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Other Consumer Loan [Member] \| Consumer Portfolio Segment [Member]
Principal loan balance	59,670	60,571
Accrued interest receivable	199	218
Net deferred loan origination fees and costs	0	0
Recorded investment in loans	59,869	60,789
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	59,869	60,789
Other Consumer Loan [Member] \| Consumer Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	$ 0	$ 0

Represents loans and leases receivable accrued interest.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Represents the loans and leases receivable principal balance.

+ References

No definition available.

+ Details

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- Definition

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 https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

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+ References

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- Definition

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

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- Definition

Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

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