Note 3 - Securities (Details) - Securities Available-for-Sale - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 86,578	$ 91,189
Gross Unrealized Gains	1,445	981
Gross Unrealized Losses	(44)	(519)
Estimated Fair Value	87,979	91,651
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 8,009	9,011
Gross Unrealized Gains
Gross Unrealized Losses	$ (15)	(46)
Estimated Fair Value	7,994	8,965
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	78,569	82,178
Gross Unrealized Gains	1,445	981
Gross Unrealized Losses	(29)	(473)
Estimated Fair Value	$ 79,985	$ 82,686

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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

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