Note 3 - Securities (Details) - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 79,647	$ 83,689
Gross Unrealized Gains	1,461	1,261
Gross Unrealized Losses	(360)	(882)
Estimated Fair Value	80,748	84,068
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,021	9,028
Gross Unrealized Gains	3	4
Gross Unrealized Losses	(106)	(180)
Estimated Fair Value	8,918	8,852
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	70,626	74,661
Gross Unrealized Gains	1,458	1,257
Gross Unrealized Losses	(254)	(702)
Estimated Fair Value	$ 71,830	$ 75,216