Note 3 - Securities (Details) - Amortized Cost and Estimated Fair Value of Available-for-Sale Securities (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 84,029	$ 83,689
Gross Unrealized Gains	1,843	1,261
Gross Unrealized Losses	(302)	(882)
Estimated Fair Value	85,570	84,068
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,023	9,028
Gross Unrealized Gains	4	4
Gross Unrealized Losses	(113)	(180)
Estimated Fair Value	8,914	8,852
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	75,006	74,661
Gross Unrealized Gains	1,839	1,257
Gross Unrealized Losses	(189)	(702)
Estimated Fair Value	$ 76,656	$ 75,216