Net Loss per Share Attributable to Common Stock (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Basic and Diluted Earnings Per Share

The following table sets forth the calculation of basic and diluted net loss per share attributable to common stock during the periods presented:



	Year Ended December 31,
	2019			2018			2017
Numerator:
Net loss	$	(80,805	)	$	(41,978	)	$	(15,002	)
Accretion of preferred stock	—			—			(175,915		)
Net loss attributable to common stock—basic and diluted	$	(80,805	)	$	(41,978	)	$	(190,917	)

Denominator:
Weighted average shares —basic and diluted	91,583,533			85,669,039			42,722,114
Net loss per share attributable to common stock—basic and diluted	$	(0.88	)	$	(0.49	)	$	(4.47	)

Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following outstanding shares of common stock equivalents were excluded from the computation of the diluted net loss per share attributable to common stock for the periods presented because their effect would have been anti-dilutive. For the year ended December 31, 2017, shares of the redeemable convertible preferred stock were anti-dilutive. However, because the preferred stock converted into common stock on a one-for-one basis on August 2, 2017 upon the completion of our IPO, we included the preferred stock in the weighted average shares outstanding for the year ended December 31, 2017.



	Year Ended December 31,
	2019	2018	2017
Stock options outstanding	7,792,181	9,435,349	13,180,950
Restricted stock units outstanding	5,023,412	3,264,702	981,276
Employee stock purchase plan	—	—	—
Total	12,815,593	12,700,051	14,162,226