Note 3 - Securities (Details) - Securities Available-for-Sale (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 88,064	$ 83,781
Gross Unrealized Gains	1,978	1,695
Gross Unrealized Losses	(68)	(240)
Estimated Fair Value	89,974us-gaap_AvailableForSaleSecurities	85,236us-gaap_AvailableForSaleSecurities
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,017	9,019
Gross Unrealized Gains	34	2
Gross Unrealized Losses	(23)	(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	79,047	74,761
Gross Unrealized Gains	1,975	1,693
Gross Unrealized Losses	(45)	(136)
Estimated Fair Value	$ 80,976	$ 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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