Note 3 - Loans and Allowance for Loan Losses - Recorded Investments in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Principal loan balance	$ 505,181	$ 470,418
Accrued interest receivable	1,873	1,632
Net deferred loan origination fees and costs	(325)	1,137
Recorded investment in loans	506,729	473,187
Individually evaluated for impairment	3,931	2,747
Collectively evaluated for impairment	502,484	470,116
Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	314	324
Real Estate Mortgage Portfolio Segment [Member] \| Real Estate Loan [Member]
Principal loan balance	128,754	131,959
Accrued interest receivable	510	462
Net deferred loan origination fees and costs	119	118
Recorded investment in loans	129,383	132,539
Individually evaluated for impairment	1,691	1,926
Collectively evaluated for impairment	127,412	130,328
Real Estate Mortgage Portfolio Segment [Member] \| Real Estate Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	280	285
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member]
Principal loan balance	18,228	19,185
Accrued interest receivable	93	114
Net deferred loan origination fees and costs	16	15
Recorded investment in loans	18,337	19,314
Individually evaluated for impairment	82	115
Collectively evaluated for impairment	18,255	19,199
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	29,953	32,559
Accrued interest receivable	77	86
Net deferred loan origination fees and costs	(6)	(1)
Recorded investment in loans	30,024	32,644
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	30,024	32,644
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	129,321	121,563
Accrued interest receivable	550	312
Net deferred loan origination fees and costs	(63)	(62)
Recorded investment in loans	129,808	121,813
Individually evaluated for impairment	1,318	353
Collectively evaluated for impairment	128,456	121,421
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Recorded investment in loans	34	39
Commercial Portfolio Segment [Member]
Principal loan balance	77,515	45,307
Accrued interest receivable	219	142
Net deferred loan origination fees and costs	(1,452)	0
Recorded investment in loans	76,282	45,449
Individually evaluated for impairment	481	249
Collectively evaluated for impairment	75,801	45,200
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	53,243	54,677
Accrued interest receivable	167	244
Net deferred loan origination fees and costs	1,061	1,067
Recorded investment in loans	54,471	55,988
Individually evaluated for impairment	352	56
Collectively evaluated for impairment	54,119	55,932
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] \| All Other Consumer Excluding Home Equity and Second Mortgage [Member]
Principal loan balance	68,167	65,168
Accrued interest receivable	257	272
Net deferred loan origination fees and costs	0	0
Recorded investment in loans	68,424	65,440
Individually evaluated for impairment	7	48
Collectively evaluated for impairment	68,417	65,392
Consumer Portfolio Segment [Member] \| All Other Consumer Excluding Home Equity and Second Mortgage [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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- Definition

Represents the loans and leases receivable principal balance.

+ References

No definition available.

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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)
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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 http://asc.fasb.org/extlink&oid=121593590&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 http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

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