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Net Income (Loss) Per Share (Tables)
 9 Months Ended
Sep. 30, 2016
Net Income (Loss) Per Share [Abstract]  
Computation of Basic and Diluted Income (Loss) Per Common Share
Basic and diluted income (loss) per common share is computed as follows (in thousands except share and per share data):

  
Three Months Ended September 30,
  
Nine Months Ended September 30,
 
  
2016
  
2015
  
2016
  
2015
 
Numerator:
            
Net income (loss) used for calculation of basic and diluted EPS
 
$
(33,846
)
 
$
(15,442
)
 
$
(23,745
)
 
$
8,311
 
                 
Denominator:
                
Weighted average shares outstanding, basic
  
34,766,440
   
33,339,163
   
34,629,330
   
30,952,458
 
Effect of dilutive securities:
                
Stock options and restricted stock units
  
-
   
-
   
-
   
2,007,775
 
Weighted average shares outstanding, diluted
  
34,766,440
   
33,339,163
   
34,629,330
   
32,960,233
 
                 
Net income (loss) per share, basic
 
$
($0.97
)
 
$
($0.46
)
 
$
($0.69
)
 
$
$0.27
 
Net income (loss) per share, diluted
 
$
($0.97
)
 
$
($0.46
)
 
$
($0.69
)
 
$
$0.25