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Net Income (Loss) Per Share
 9 Months Ended
Sep. 30, 2015
Net Income (Loss) Per Share [Abstract]  
Net Income (Loss) Per Share
7. Net Income (Loss) Per Share

Basic income (loss) per common share is determined by dividing income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted income (loss) per share is computed by dividing the income (loss) attributable to common stockholders by the weighted-average number of common stock equivalents outstanding for the period. The treasury stock method is used to determine the dilutive effect of the Company's stock option grants. 1,916,156 and 2,264,749 stock options (common stock equivalents) were excluded from the calculation of diluted loss per share for the three months ended September 30, 2015 and 2014, respectively, because their inclusion would have been anti-dilutive. 911,304 and  2,274,734 stock options were excluded from the calculation of diluted loss per share for the nine months ended September 30, 2015 and 2014, respectively, because their inclusion would have been anti-dilutive.

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,
 
  
2015
  
2014
  
2015
  
2014
 
Numerator:
        
Net income (loss) used for calculation of basic and diluted EPS
 
$
(15,442
)
 
$
(3,928
)
 
$
8,311
  
$
(19,295
)
                 
Denominator:
                
Weighted average shares outstanding, basic
  
33,339,163
   
27,751,437
   
30,952,458
   
27,227,151
 
Effect of dilutive securities:
                
Stock options and restricted stock units
  
-
   
-
   
2,007,775
   
-
 
Weighted average shares outstanding, diluted
  
33,339,163
   
27,751,437
   
32,960,233
   
27,227,151
 
                 
Net income (loss) per share, basic
 
$ 
(0.46
)
 
$ 
(0.14
)
 
$
0.27
  
$ 
(0.71
)
Net income (loss) per share, diluted
 
$ 
(0.46
)
 
$ 
(0.14
)
 
$
0.25
  
$ 
(0.71
)