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Note 5 - Investment Securities Available-for-sale and Held-to-maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Residential Mortgage Backed Securities [Member]
Available-for-Sale, Amortized Cost	$ 110,687	$ 135,104
Available-for-Sale, Gross Unrealized Gains	1,849	998
Available-for-Sale, Gross Unrealized Losses	(20)	(608)
Available-for-Sale, Estimated Fair Value	112,516	135,494
Commercial Mortgage Backed Securities [Member]
Available-for-Sale, Amortized Cost	53,472	45,961
Available-for-Sale, Gross Unrealized Gains	295	164
Available-for-Sale, Gross Unrealized Losses	(456)	(616)
Available-for-Sale, Estimated Fair Value	53,311	45,509
Held-to-Maturity, Amortized Cost	17,396	16,321
Held-to-Maturity, Gross Unrealized Gains	105	33
Held-to-Maturity, Gross Unrealized Losses		(170)
Held-to-Maturity, Estimated Fair Value	17,501	16,184
US Government Agencies Debt Securities [Member]
Available-for-Sale, Amortized Cost	2,000	1,999
Available-for-Sale, Gross Unrealized Gains	8
Available-for-Sale, Gross Unrealized Losses		(17)
Available-for-Sale, Estimated Fair Value	2,008	1,982
Held-to-Maturity, Amortized Cost	13,972	13,766
Held-to-Maturity, Gross Unrealized Gains	77	19
Held-to-Maturity, Gross Unrealized Losses	(2)	(71)
Held-to-Maturity, Estimated Fair Value	14,047	13,714
US States and Political Subdivisions Debt Securities [Member]
Available-for-Sale, Amortized Cost	10,267	14,071
Available-for-Sale, Gross Unrealized Gains	662	931
Available-for-Sale, Gross Unrealized Losses		(4)
Available-for-Sale, Estimated Fair Value	10,929	14,998
Held-to-Maturity, Amortized Cost	2,184	2,272
Held-to-Maturity, Gross Unrealized Gains	40	18
Held-to-Maturity, Gross Unrealized Losses	(3)	(4)
Held-to-Maturity, Estimated Fair Value	2,221	2,286
Corporate Debt Securities [Member]
Available-for-Sale, Amortized Cost	767	780
Available-for-Sale, Gross Unrealized Gains	2
Available-for-Sale, Gross Unrealized Losses
Available-for-Sale, Estimated Fair Value	769	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	177,273	197,995
Available-for-Sale, Gross Unrealized Gains	2,816	2,093
Available-for-Sale, Gross Unrealized Losses	(476)	(1,245)
Available-for-Sale, Estimated Fair Value	179,613	198,843
Held-to-Maturity, Amortized Cost	33,552	32,359
Held-to-Maturity, Gross Unrealized Gains	222	70
Held-to-Maturity, Gross Unrealized Losses	(5)	(245)
Held-to-Maturity, Estimated Fair Value	$ 33,769	$ 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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- Definition

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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-Publisher FASB
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- Definition

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+ 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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Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity.

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Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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