Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss per Share

The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2018			2017			2018			2017
Numerator
Net loss (in thousands)	$	(30,835	)	$	(12,308	)	$	(54,963	)	$	(30,993	)
Denominator
Weighted-average number of common    shares used in net loss per share – basic		28,704,853			24,845,364			27,022,269			23,196,293
Dilutive potential common    shares		—			—			—			—
Weighted-average number of common    shares used in net loss per share – diluted		28,704,853			24,845,364			27,022,269			23,196,293
Net loss per share – basic	$	(1.07	)	$	(0.50	)	$	(2.03	)	$	(1.34	)
Net loss per share – diluted	$	(1.07	)	$	(0.50	)	$	(2.03	)	$	(1.34	)