Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2018

Net Loss per Share

Basic and diluted net loss per common share

	Three months ended				Six months ended
	June 30,				June 30,
(in thousands, except per share data)	2018		2017		2018		2017
			(As Revised)				(As Revised)
Numerator:
Net loss, basic and diluted	$	(33,824)	$	(29,066)	$	(66,697)	$	(62,546)
Denominator:
Weighted-average number of shares used in computing net loss per share, basic and diluted		54,551		53,088		54,342		52,924
Net loss per share, basic	$	(0.62)	$	(0.55)	$	(1.23)	$	(1.18)
Net loss per share, diluted	$	(0.62)	$	(0.55)	$	(1.23)	$	(1.18)

Total outstanding potentially dilutive shares not included in the calculation of dilutive EPS

	June 30,
	2018	2017
	(in thousands)
Options to purchase common stock	10,255	9,951
Warrants to purchase common stock	—	377
Restricted stock units	1,025	383
Employee stock purchase plan	70	86
	11,350	10,797