Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2018

Table Text Blocks

Schedule of basic and diluted net loss per share attributable to common stockholders

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Numerator:
Net loss	$	(25,281)	$	(12,335)	$	(45,875)	$	(24,774)
Accretion of preferred stock to redemption value		(159,453)		3,323		(199,492)		(8,324)
Net loss attributable to common stockholders	$	(184,734)	$	(9,012)	$	(245,367)	$	(33,098)
Denominator:
Weighted-average number of common shares outstanding—basic and diluted		44,759,435		10,255,078		28,104,372		10,116,021
Net loss per share attributable to common stockholders—basic and diluted	$	(4.13)	$	(0.88)	$	(8.73)	$	(3.27)

Schedule of potential common shares excluded from computation of diluted net loss per share

	As of June30,
	2018	2017
Options to purchase common stock	18,452,393	13,566,354
Unvested restricted stock units	412,521	—
Options to purchase SeriesE-1 preferred stock (as converted to common stock)	—	837,835
Warrants to purchase common stock	—	106,250
Warrants to purchase redeemable convertible preferred stock (as converted to common stock)	—	167,500
Redeemable convertible preferred stock (as converted to common stock)	—	44,370,560
	18,864,914	59,048,499