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Note 4 - Loans Receivable and Allowance for Loan Losses - Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Loans receivable, gross	$ 724,555	$ 719,647
Allowance for loan losses	(6,485)	(6,297)	$ (5,697)	$ (4,675)
Loans receivable, net	718,070	713,350
Commercial Real Estate Portfolio Segment [Member]
Loans receivable, gross	313,868	299,925
Allowance for loan losses	(2,480)	(2,212)	(2,198)	(1,853)
Residential Portfolio Segment [Member]
Loans receivable, gross	144,633	146,377
Allowance for loan losses	(1,073)	(959)	(1,073)	(534)
Commercial Portfolio Segment [Member]
Loans receivable, gross	129,913	131,161
Allowance for loan losses	(1,759)	(2,023)	(1,049)	(740)
Consumer Portfolio Segment [Member]
Loans receivable, gross	83,185	87,707
Allowance for loan losses	(546)	(568)	(583)	(641)
Construction Portfolio Segment [Member]
Loans receivable, gross	46,348	47,619
Allowance for loan losses	(488)	(481)	(591)	(712)
Construction to Permanent Portfolio Segment [Member]
Loans receivable, gross	6,608	6,858
Allowance for loan losses	$ (61)	$ (54)	$ (77)	$ (69)

X

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance 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 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
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-Topic 310
-SubTopic 10
-Section 50
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X

- 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

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- Definition

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. Includes loans held for sale. 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 942
-SubTopic 210
-Section S99
-Paragraph 1
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