Note 4 - Investment Securities Available-for-sale (Details) - Investment Securities Pledged as Collateral (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Note 4 - Investment Securities Available-for-sale (Details) - Investment Securities Pledged as Collateral [Line Items]
Investment securities available for sale pledged	$ 126,222	$ 119,591
Municpal and Other Secured Deposit [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Investment Securities Pledged as Collateral [Line Items]
Investment securities available for sale pledged	83,272	75,718
Retail Purchase Agreements [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Investment Securities Pledged as Collateral [Line Items]
Investment securities available for sale pledged	24,440	25,626
Federal Reserve Line of Credit [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Investment Securities Pledged as Collateral [Line Items]
Investment securities available for sale pledged	1,350	1,459
Correspondent Banks Line of Credit [Member]
Note 4 - Investment Securities Available-for-sale (Details) - Investment Securities Pledged as Collateral [Line Items]
Investment securities available for sale pledged	$ 17,160	$ 16,788