Note 8 - Loans and Allowance for Loan Losses - Activity In the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Balance, beginning of period	$ 9,748	$ 9,507	$ 9,783	$ 9,344
Provision for loan losses	127	(499)	(134)	81
Recoveries	294	423	682	500
Loans charged off	(168)	(209)	(330)	(703)
Balance, end of period	10,001	9,222	10,001	9,222
Real Estate Portfolio Segment [Member]
Balance, beginning of period	8,601	8,184	8,509	8,205
Provision for loan losses	(148)	(546)	(339)	(150)
Recoveries	264	398	605	415
Loans charged off	(88)	(75)	(146)	(509)
Balance, end of period	8,629	7,961	8,629	7,961
Commercial Portfolio Segment [Member]
Balance, beginning of period	836	864	951	854
Provision for loan losses	296	135	249	128
Recoveries	17	17	37	66
Loans charged off	(65)	(116)	(153)	(148)
Balance, end of period	1,084	900	1,084	900
Consumer Portfolio Segment [Member]
Balance, beginning of period	311	459	323	285
Provision for loan losses	(21)	(88)	(44)	103
Recoveries	13	8	40	19
Loans charged off	(15)	(18)	(31)	(46)
Balance, end of period	$ 288	$ 361	$ 288	$ 361

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ 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 (c)(3)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: 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))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

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

+ References

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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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