Note 3 - Securities (Details) - Securities Available-for-Sale - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 86,642	$ 83,781
Gross Unrealized Gains	1,465	1,695
Gross Unrealized Losses	(216)	(240)
Estimated Fair Value	87,891	85,236
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,013	9,019
Gross Unrealized Gains	2	2
Gross Unrealized Losses	(17)	(104)
Estimated Fair Value	8,998	8,917
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	77,629	74,762
Gross Unrealized Gains	1,463	1,693
Gross Unrealized Losses	(199)	(136)
Estimated Fair Value	$ 78,893	$ 76,319

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

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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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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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