Net loss per share (Tables)

12 Months Ended

Dec. 31, 2019

Net loss per share

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

Basic and diluted net loss per share attributable to common stockholders was calculated as follows for the years ended December 31, 2019 and 2018 (in thousands, except per share data):

	Year ended
	December 31,
	2019		2018
Numerator:
Net loss attributable to common stockholders	$	(57,410)	$	(53,281)
Denominator:
Weighted-average common shares outstanding—basic and diluted		33,556		20,199
Net loss per share attributable to common stockholders—basic and diluted	$	(1.71)	$	(2.64)

Schedule of anti-dilutive securities excluded from computation of diluted net loss per share

The following common stock equivalents outstanding as of December 31, 2019 and 2018, were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands):

	As of December 31,
	2019	2018
Stock options issued and outstanding	4,798	3,959
Unvested restricted stock	1,032	195
	5,830	4,154