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Note 11 - Federal and State Income Taxes (Details) - Income 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
Income Tax Rate Reconciliation [Abstract]                      
Income tax at the statutory federal rate                 $ 3,288 $ 1,222 $ (1,901)
Income tax at the statutory federal rate                 34.00% 34.00% 34.00%
Nondeductible expenses                 127 138 171
Nondeductible expenses                 1.30% 3.80% (3.00%)
New hire credit                     (124)
New hire credit                     2.20%
State income taxes—net of federal benefit                 341 56 (879)
State income taxes—net of federal benefit                 3.60% 1.60% 15.70%
Total income tax expense (benefit) $ 776 $ 1,575 $ 1,733 $ (328) $ (257) $ 601 $ 627 $ 445 $ 3,756 $ 1,416 $ (2,733)
Total income tax expense (benefit)                 38.90% 39.40% 48.90%