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Note 5 - Income per Common Share
 3 Months Ended
Mar. 31, 2015
Notes to Financial Statements  
Earnings Per Share [Text Block]
5.
income PER COMMON SHARE
 
Basic income per common share is computed using the weighted average number of common shares outstanding. Diluted income per common share for the three month periods ended March 31, 2015 and 2014 is computed using the weighted-average number of common shares outstanding adjusted for the incremental shares attributed to outstanding options to purchase common stock, as well as unvested RSUs. Incremental shares of 169,916 were used in the calculation of diluted income per common share in the three months ended March 31, 2015. Incremental shares of 125,067 were not used in the calculation of diluted income per common share in the three month period ended March 31, 2015, as their exercise price was in excess of the Company’s average stock price for the respective period and, accordingly, these shares are not assumed to be exercised for the diluted earnings per share calculation, as they would be anti-dilutive. Incremental shares of 316,919 were used in the calculation of diluted income per common share in the three months ended March 31, 2014. Incremental shares of 116,292 were not included in the diluted earnings per share calculations for the three month period ended March 31, 2014 as their exercise price was in excess of the Company’s average stock price for the respective period and, accordingly, these shares are not assumed to be exercised for the diluted earnings per share calculation, as they would be anti-dilutive.