Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities [Line Items]
Investment securities available for sale, amortized cost	$ 203,386	$ 212,832
Investment securities available for sale, gross unrealized gains	1,151	753
Investment securities available for sale, gross unrealized losses	(1,489)	(2,074)
Investment securities available for sale, fair value	203,048	211,511
US Government Agencies Debt Securities [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities [Line Items]
Investment securities available for sale, amortized cost	3,160	3,930
Investment securities available for sale, gross unrealized gains	43	35
Investment securities available for sale, fair value	3,203	3,965
US States and Political Subdivisions Debt Securities [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities [Line Items]
Investment securities available for sale, amortized cost	6,536	6,665
Investment securities available for sale, gross unrealized gains	55	84
Investment securities available for sale, gross unrealized losses	(114)	(17)
Investment securities available for sale, fair value	6,477	6,732
Collateralized Mortgage Obligations (Federal Agencies) [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities [Line Items]
Investment securities available for sale, amortized cost	87,521	89,311
Investment securities available for sale, gross unrealized gains	163	13
Investment securities available for sale, gross unrealized losses	(971)	(1,550)
Investment securities available for sale, fair value	86,713	87,774
Other Mortgage-Backed (Federal Agencies) [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities [Line Items]
Investment securities available for sale, amortized cost	75,645	78,532
Investment securities available for sale, gross unrealized gains	662	411
Investment securities available for sale, gross unrealized losses	(349)	(440)
Investment securities available for sale, fair value	75,958	78,503
SBA Loan-Backed (Federal Agencies) [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Reconciliation of Available-for-sale Securities [Line Items]
Investment securities available for sale, amortized cost	30,524	34,394
Investment securities available for sale, gross unrealized gains	228	210
Investment securities available for sale, gross unrealized losses	(55)	(67)
Investment securities available for sale, fair value	$ 30,697	$ 34,537