Note 4 - Loans and Allowance for Loan Losses - Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans	$ 463,905	$ 437,231
Less undisbursed portion of loans in process	(26,675)	(25,020)
Principal loan balance	437,230	412,211
Deferred loan origination fees and costs, net	1,095	1,041
Allowance for loan losses	(4,065)	(3,634)	$ (3,386)	$ (3,415)
Loans, net	434,260	409,618
Real Estate Mortgage Portfolio Segment [Member] \| Residential Loan [Member]
Loans	136,445	136,399
Allowance for loan losses	(693)	(219)	(380)	(527)
Real Estate Mortgage Portfolio Segment [Member] \| Land Loan [Member]
Loans	22,607	18,198
Principal loan balance	22,607	18,198
Deferred loan origination fees and costs, net	18	17
Allowance for loan losses	(162)	(133)	(56)	(157)
Real Estate Mortgage Portfolio Segment [Member] \| Residential Construction [Member]
Loans	31,459	28,854
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Loans	107,445	100,133
Principal loan balance	107,445	100,133
Deferred loan origination fees and costs, net	(38)	(42)
Allowance for loan losses	(1,401)	(1,622)	(1,670)	(1,541)
Real Estate Mortgage Portfolio Segment [Member] \| Commercial Real Estate Construction [Member]
Loans	20,591	17,161
Commercial Portfolio Segment [Member]
Loans	36,297	34,114
Principal loan balance	36,297	34,114
Deferred loan origination fees and costs, net		2
Allowance for loan losses	(459)	(291)	(198)	(261)
Consumer Portfolio Segment [Member] \| Home Equity and Second Mortgage [Member]
Loans	51,731	49,802
Principal loan balance	51,731	49,802
Deferred loan origination fees and costs, net	1,025	987
Allowance for loan losses	(443)	(710)	(683)	(626)
Consumer Portfolio Segment [Member] \| Automobile Loan [Member]
Loans	42,124	38,361
Consumer Portfolio Segment [Member] \| Loans Secured by Deposits [Member]
Loans	1,399	1,751
Consumer Portfolio Segment [Member] \| Unsecured Loan [Member]
Loans	3,638	3,744
Consumer Portfolio Segment [Member] \| Other Consumer Loan [Member]
Loans	10,169	8,714
Principal loan balance	57,330	52,570
Deferred loan origination fees and costs, net
Allowance for loan losses			$ (319)	$ (256)

Represents the loans and leases receivable principal balance.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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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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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
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-Publisher FASB
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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 45
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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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