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Note 12 - Income Taxes (Details) - Tax Rate Reconciliation (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Tax Rate Reconciliation [Abstract]                      
Provision at statutory rate (in Dollars)                 $ 3,062 $ 2,700 $ 1,606
Provision at statutory rate                 34.00% 34.00% 34.00%
Tax-free income (in Dollars)                 (1,138) (1,095) (1,071)
Tax-free income                 (12.60%) (13.80%) (22.70%)
Nondeductible interest expense (in Dollars)                 45 48 61
Nondeductible interest expense                 0.50% 0.60% 1.30%
Other (in Dollars)                 10 9  
Other                 0.10% 0.10%  
Actual tax expense and effective rate (in Dollars) $ 500 $ 521 $ 476 $ 482 $ 270 $ 494 $ 463 $ 435 $ 1,979 $ 1,662 $ 596
Actual tax expense and effective rate                 22.00% 20.90% 12.60%