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Net Loss Per Share
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Loss Per Share
Basic loss per common share is determined by dividing loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted loss per share is computed by dividing the 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. 4,743,518 and 4,018,724 stock options (common stock equivalents) were excluded from the calculation of diluted loss per share for the three months ended March 31, 2017 and 2016, respectively, because their inclusion would have been anti-dilutive.
Basic and diluted loss per common share is computed as follows (in thousands except share and per share data):
 
Three Months Ended March 31,
 
2017
 
2016
Numerator:
 
 
 
Net loss used for calculation of basic and diluted EPS
$
(37,655
)
 
$
(30,363
)
 
 
 
 
Denominator:
 
 
 
Weighted average shares outstanding, basic
34,958,228

 
34,503,845

Effect of dilutive securities:
 
 
 
Stock options and restricted stock units
—

 
—

Weighted average shares outstanding, diluted
34,958,228

 
34,503,845

 
 
 
 
Net loss per share, basic and diluted
$
(1.08
)
 
$
(0.88
)