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Note 2 - Income Per Share (Details) - Calculation of Net Income Per Share (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Numerator:        
Net income (in Dollars) $ 1,857 $ 1,973 $ 4,263 $ 1,905
Denominator:        
Denominator for basic earnings per share – weighted-average shares 14,959 14,864 14,935 14,827
Equivalent shares issuable upon conversion of unvested restricted stock 185 179 231 196
Equivalent shares issuable upon conversion of unvested employee stock options 1      
Denominator for diluted earnings per share – adjusted weighted-average shares and assumed conversions 15,145 15,043 15,166 15,023
Basic income per share: (in Dollars per share) $ 0.12 $ 0.13 $ 0.29 $ 0.13
Diluted income per share: (in Dollars per share) $ 0.12 $ 0.13 $ 0.28 $ 0.13