Net Loss per Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Net Loss per Share

11. Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows for the three and six months ended June 30, 2018 and 2017:

	For the three months ended June 30,						For the six months ended June 30,
(In thousands)	2018			2017			2018			2017
Numerator:
Net loss	$	(43,875	)	$	(28,880	)	$	(85,444	)	$	(52,764	)
Net loss:	$	(43,875	)	$	(28,880	)	$	(85,444	)	$	(52,764	)
Denominator:
Weighted average common shares    outstanding, basic and diluted		37,697			31,826			37,659			31,765
Net loss per share, basic and diluted	$	(1.16	)	$	(0.91	)	$	(2.27	)	$	(1.66	)

The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated as including them would have an anti-dilutive effect:

	For the three months ended June 30,				For the six months ended June 30,
	2018		2017		2018		2017
Shares issuable upon conversion of the    2024 Convertible Notes		7,515		4,927		7,515		2,464
Stock options		4,467		3,479		4,366		3,413
Restricted stock units		291		189		255		189
Total		12,273		8,595		12,136		6,066