Net Loss per Common Share (Tables)

12 Months Ended

Dec. 31, 2021

Schedule of Reconciliation of Numerators and Denominators Used In Computing Net Loss From Continuing Operations Per Share

A reconciliation of the numerators and denominators used in computing net loss from continuing operations per share is as follows (in thousands, except per share amounts):

	December 31,
	2021			2020			2019
	(in thousands, except share and per share amounts)
Numerator:
Net loss	$	(60,725	)	$	(93,844	)	$	(82,177	)
Denominator:
Weighted average number of shares outstanding—basic and diluted		55,815,873			50,864,889			43,624,807
Net loss per share—basic and diluted	$	(1.09	)	$	(1.84	)	$	(1.88	)

Summary of Potentially Dilutive Securities Excluded from Computation of Diluted Per Share

Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows:

	Year Ended December 31,
	2021		2020		2019
Options to purchase common stock		8,666,955		7,540,472		6,906,898
Early exercised common stock subject to future vesting		33,370		66,741		146,915
RSUs		1,990,937		2,832,077		325,887
PSUs		—		150,000		—
Shares subject to the 2018 ESPP		147,741		111,383		47,597
Total		10,839,003		10,700,673		7,427,297