Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Schedule of basic and diluted net loss per share

Basic and diluted net loss per share is calculated as follows (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2017			2016
Numerator:
Net loss	$	(56,939	)	$	(40,463	)
Loss attributable to common stockholders - basic and diluted	$	(56,939	)	$	(40,463	)
Denominator:
Weighted-average number of common shares used in loss per share - basic and diluted	43,185,952			43,012,924
Loss per share - basic and diluted	$	(1.32	)	$	(0.94	)

Schedule of potentially dilutive securities excluded from the computation of diluted weighted-average shares outstanding

The following potentially dilutive securities, prior to the use of the treasury stock method, have been excluded from the computation of diluted weighted-average shares outstanding, as they would be anti-dilutive. For the three months ended March 31, 2017 and 2016, all of the Company’s options to purchase common stock, warrants, and restricted stock units outstanding were assumed to be anti-dilutive as earnings attributable to common stockholders was in a loss position. 

	Three Months Ended March 31,
	2017	2016
Options to purchase common stock	6,968,155	4,973,694
Warrants	605,415	631,588
Restricted stock units	76,215	—