Net Loss Per Common Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss Per Share

Basic net loss per share is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, without consideration for common stock equivalents. Diluted net loss per share is the same as basic net loss per share, since the effects of potentially dilutive securities are antidilutive, given the net loss for each period presented.

The following table sets forth the computation of the basic and diluted net loss per share (in thousands, except for share and per share amounts):

	Year Ended December 31,
	2020			2019			2018
Numerator:
Net loss	$	(105,314	)	$	(94,433	)	$	(64,775	)
Denominator:
Weighted-average common shares outstanding, basic and diluted		37,792,365			33,554,823			8,919,281
Net loss per share, basic and diluted	$	(2.79	)	$	(2.81	)	$	(7.26	)

Computation of Potentially Anti-Dilutive Securities

Since the Company was in a loss position for all periods presented, basic net loss per share is the same as diluted net loss per share for all periods, as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows:

	December 31,
	2020		2019		2018
Options issued and outstanding and ESPP shares issuable and outstanding		4,213,738		3,179,041		2,429,859
Early exercised common stock subject to future vesting		—		30,874		226,967
Total		4,213,738		3,209,915		2,656,826