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Note 5 - Investment Securities Available-for-sale and Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Residential Mortgage Backed Securities [Member]
Available-for-Sale, Amortized Cost	$ 128,972	$ 135,104
Available-for-Sale, Gross Unrealized Gains	1,136	998
Available-for-Sale, Gross Unrealized Losses	(172)	(608)
Available-for-Sale, Estimated Fair Value	129,936	135,494
Commercial Mortgage Backed Securities [Member]
Available-for-Sale, Amortized Cost	52,117	45,961
Available-for-Sale, Gross Unrealized Gains	172	164
Available-for-Sale, Gross Unrealized Losses	(549)	(616)
Available-for-Sale, Estimated Fair Value	51,740	45,509
Held-to-Maturity, Amortized Cost	18,205	16,321
Held-to-Maturity, Gross Unrealized Gains	34	33
Held-to-Maturity, Gross Unrealized Losses	(56)	(170)
Held-to-Maturity, Estimated Fair Value	18,183	16,184
US Government Agencies Debt Securities [Member]
Available-for-Sale, Amortized Cost	$ 2,000	$ 1,999
Available-for-Sale, Gross Unrealized Gains
Available-for-Sale, Gross Unrealized Losses	$ (4)	$ (17)
Available-for-Sale, Estimated Fair Value	1,996	1,982
Held-to-Maturity, Amortized Cost	11,556	13,766
Held-to-Maturity, Gross Unrealized Gains	31	19
Held-to-Maturity, Gross Unrealized Losses	(8)	(71)
Held-to-Maturity, Estimated Fair Value	11,579	13,714
US States and Political Subdivisions Debt Securities [Member]
Available-for-Sale, Amortized Cost	14,049	14,071
Available-for-Sale, Gross Unrealized Gains	922	931
Available-for-Sale, Gross Unrealized Losses	(1)	(4)
Available-for-Sale, Estimated Fair Value	14,970	14,998
Held-to-Maturity, Amortized Cost	2,217	2,272
Held-to-Maturity, Gross Unrealized Gains	25	18
Held-to-Maturity, Gross Unrealized Losses	(1)	(4)
Held-to-Maturity, Estimated Fair Value	2,241	2,286
Corporate Debt Securities [Member]
Available-for-Sale, Amortized Cost	$ 774	$ 780
Available-for-Sale, Gross Unrealized Gains
Available-for-Sale, Gross Unrealized Losses	$ (8)
Available-for-Sale, Estimated Fair Value	766	$ 780
US Treasury Securities [Member]
Available-for-Sale, Amortized Cost	$ 80	$ 80
Available-for-Sale, Gross Unrealized Gains
Available-for-Sale, Gross Unrealized Losses
Available-for-Sale, Estimated Fair Value	$ 80	$ 80
Available-for-Sale, Amortized Cost	197,992	197,995
Available-for-Sale, Gross Unrealized Gains	2,230	2,093
Available-for-Sale, Gross Unrealized Losses	(734)	(1,245)
Available-for-Sale, Estimated Fair Value	199,488	198,843
Held-to-Maturity, Amortized Cost	31,978	32,359
Held-to-Maturity, Gross Unrealized Gains	90	70
Held-to-Maturity, Gross Unrealized Losses	(65)	(245)
Held-to-Maturity, Estimated Fair Value	$ 32,003	$ 32,184

X

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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