Note 3 - Loans and Allowance for Loan Losses - Recorded Investments in Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Principal loan balance	$ 546,959	$ 488,246
Accrued interest receivable	1,537	1,460
Net deferred loan origination fees and costs	1,200	1,124
Recorded investment in loans	549,696	490,830
Individually evaluated for impairment	1,973	2,315
Collectively evaluated for impairment	547,429	488,234
Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	294	281
Real Estate Mortgage Portfolio Segment [Member] \| Real Estate Loan [Member]
Principal loan balance	153,659	130,603
Accrued interest receivable	453	442
Net deferred loan origination fees and costs	107	107
Recorded investment in loans	154,219	131,152
Individually evaluated for impairment	894	1,034
Collectively evaluated for impairment	153,036	129,848
Real Estate Mortgage Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	289	270
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member]
Principal loan balance	22,377	19,478
Accrued interest receivable	98	103
Net deferred loan origination fees and costs	14	13
Recorded investment in loans	22,489	19,594
Individually evaluated for impairment	51	102
Collectively evaluated for impairment	22,438	19,492
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member]
Principal loan balance	32,196	33,439
Accrued interest receivable	66	67
Net deferred loan origination fees and costs	(9)	(15)
Recorded investment in loans	32,253	33,491
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	32,253	33,491
Real Estate Mortgage Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Principal loan balance	161,296	137,915
Accrued interest receivable	299	290
Net deferred loan origination fees and costs	(92)	(64)
Recorded investment in loans	161,503	138,141
Individually evaluated for impairment	566	702
Collectively evaluated for impairment	160,932	137,428
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	5	11
Commercial Portfolio Segment [Member]
Principal loan balance	54,760	51,787
Accrued interest receivable	129	180
Net deferred loan origination fees and costs	(12)	(46)
Recorded investment in loans	54,877	51,921
Individually evaluated for impairment	147	174
Collectively evaluated for impairment	54,730	51,747
Commercial Portfolio Segment [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Principal loan balance	58,596	54,453
Accrued interest receivable	272	160
Net deferred loan origination fees and costs	1,192	1,129
Recorded investment in loans	60,060	55,742
Individually evaluated for impairment	315	303
Collectively evaluated for impairment	59,745	55,439
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	0	0
Consumer Portfolio Segment [Member] \| Other Consumer Loan [Member]
Principal loan balance	64,075	60,571
Accrued interest receivable	220	218
Net deferred loan origination fees and costs	0	0
Recorded investment in loans	64,295	60,789
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	64,295	60,789
Consumer Portfolio Segment [Member] \| Other Consumer Loan [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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