Net Loss per Share (Tables)

3 Months Ended

Mar. 31, 2019

Net Loss per Share

Basic and diluted net loss per share

	Three Months Ended
	March 31,
	2019		2018
Numerator:
Net loss	$	(37,565)	$	(30,229)
Denominator:
Weighted average shares of common stock outstanding		41,248,663		30,885,928
Net loss per share, basic and diluted	$	(0.91)	$	(0.98)

Potential common shares excluded from the calculation of diluted net loss per share attributable to common stockholders

	March 31,
	2019	2018
Options to purchase common stock	4,182,584	4,346,910
Restricted stock unit awards	1,968,023	595,263
Total potential shares of common stock	6,150,607	4,942,173