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Net Loss Per Share
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Net Loss Per Share
NET LOSS PER SHARE
Net loss per share was computed by dividing net loss by the weighted average number of common shares outstanding for the years ended December 31, 2018, 2017, and 2016:
 
Year Ended December 31,
 
2018
 
2017
 
2016
Net loss
$
(120,011
)
 
$
(91,248
)
 
$
(69,770
)
Weighted average shares—basic
103,305,911

 
85,115,592

 
72,824,070

Net loss per share—basic
$
(1.16
)
 
$
(1.07
)
 
$
(0.96
)
Weighted average shares—diluted
103,305,911

 
85,115,592

 
72,824,070

Net loss per share—diluted
$
(1.16
)
 
$
(1.07
)
 
$
(0.96
)

The below outstanding securities were excluded from the above calculation of net loss per share because their impact under the "treasury stock method" and "if-converted method" would have been anti-dilutive due to our net loss per share for the years ended December 31, 2018, 2017, and 2016, as summarized below:
 
Year Ended December 31,
 
2018
 
2017
 
2016
Common stock options
4,407,765

 
3,668,662

 
1,294,594

Restricted stock awards
1,802,130

 
1,562,918

 
2,147,157

Restricted stock units
255,214


217,206


—

2018 Convertible Notes
—

 
3,854,959

 
10,454,799

Common stock warrants
—

 
138,277

 
—

Total
6,465,109

 
9,442,022

 
13,896,550