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Earning (Loss) Per Share
 12 Months Ended
Dec. 31, 2011
Earning (Loss) Per Share [Abstract]  
Earning (Loss) Per Share
NOTE 12:-
EARNING (LOSS) PER SHARE

The following table sets forth the computation of basic and diluted net earnings (loss) per share:

   
Year ended
December 31,
  
   
2009
    
2010
    
2011
  
                   
Numerator for basic and diluted net earnings (loss) per share:
                  
                   
Net income (loss)
   $ (5,936 )   $ 9,634     $ 21,337  
                         
Weighted average shares outstanding, net of treasury stock:
                        
                         
Denominator for basic net  earnings (loss) per share
     18,879,230       19,557,545       20,952,866  
Effect of dilutive securities:
                        
Employee stock options
     *)   -       2,176,093       1,935,198  
                         
Denominator for diluted net earnings (loss) per share
     18,879,230       21,733,638       22,888,064  
                         
Basic net earnings (loss) per share
   $ (0.31 )   $ 0.49     $ 1.02  
                         
Diluted net earnings (loss) per share
   $ (0.31 )   $ 0.44     $ 0.93  

 
*)
Antidilutive.