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Net Income (Loss) Per Share (Tables)
6 Months Ended
Jun. 30, 2012
Net Income (Loss) Per Share [Abstract]  
Summaries of weighted average number of shares outstanding
                                 
    Three Months ended     Six Months ended  
    June 30     June 30  
    2012     2011     2012     2011  

Weighted average number of shares outstanding:

                               

Common stock

    20,026,354       19,840,116       20,008,358       19,806,034  

Common stock equivalents-stock options, grants

    61,278       64,628       75,372       48,495  
   

 

 

   

 

 

   

 

 

   

 

 

 

Diluted shares outstanding

    20,087,632       19,904,744       20,083,730       19,854,529  
   

 

 

   

 

 

   

 

 

   

 

 

 

For the three months ended June 30, 2011 diluted net loss per share is calculated based on the weighted average number of shares of common stock outstanding and not diluted shares outstanding because of the antidilutive impact of common stock equivalents.