Note 3 - Loans and Allowance for Loan Losses - Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Loans	$ 494,116	$ 493,499
Less undisbursed portion of loans in process	(24,638)	(23,081)
Principal loan balance	469,478	470,418
Deferred loan origination fees, net	1,121	1,137
Allowance for loan losses	(5,307)	(5,061)	$ (4,339)	$ (4,065)
Loans, net	465,292	466,494
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member]
Loans	128,039	131,959
Allowance for loan losses	(929)	(867)	(727)	(693)
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member]
Loans	18,861	19,185
Principal loan balance	18,861	19,185
Deferred loan origination fees, net	14	15
Allowance for loan losses	(163)	(163)	(164)	(162)
Real Estate Mortgage Portfolio Segment [Member] \| Residential Construction [Member]
Loans	42,760	35,554
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Loans	129,180	121,563
Principal loan balance	129,180	121,563
Deferred loan origination fees, net	(68)	(62)
Allowance for loan losses	(1,735)	(1,623)	(1,391)	(1,401)
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Construction [Member]
Loans	12,620	20,086
Commercial Portfolio Segment [Member]
Loans	44,811	45,307
Principal loan balance	44,811	45,307
Deferred loan origination fees, net
Allowance for loan losses	(620)	(595)	(541)	(459)
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Loans	54,655	54,677
Principal loan balance	54,655	54,677
Deferred loan origination fees, net	1,065	1,067
Allowance for loan losses	(550)	(515)	(450)	(443)
Consumer Portfolio Segment [Member] \| Automobile Loan [Member]
Loans	45,304	46,443
Consumer Portfolio Segment [Member] \| Loans Secured by Deposits [Member]
Loans	1,318	1,372
Consumer Portfolio Segment [Member] \| Unsecured Loan [Member]
Loans	3,434	3,653
Consumer Portfolio Segment [Member] \| Other Consumer Loan [Member]
Loans	13,134	13,700
Allowance for loan losses	$ (957)	$ (948)	$ (775)	$ (683)

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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- Definition

Amount of undisbursed portion of the loan receivable balance (loans in process). Excludes loans and leases covered under loss sharing agreements.

+ References

No definition available.

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

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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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.

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