Stock Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Summary of Activity Relating to the Company's Options to Purchase Common Stock

The following table summarizes the activity relating to the Company’s options to purchase common stock for the nine months ended September 30, 2021:

	Number of Options	Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
					(in thousands)
Outstanding at December 31, 2020	4,176,518	$	40.24	5.28	$	18,415
Granted	757,992	$	28.06
Forfeited or expired	(1,001,831)	$	48.92
Exercised	(228,741)	$	14.04
Outstanding at September 30, 2021	3,703,938	$	37.02	4.22	$	2,708

Summary of Information About the Company's Stock Option Plan

The following table summarizes information about the Company’s stock option plan as of September 30, 2021:

	Number of Options	Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
					(in thousands)
Vested and expected to vest at September 30, 2021	3,703,938	$	37.02	4.22	$	2,708
Exercisable at September 30, 2021	2,947,780	$	37.21	3.11	$	2,708

Summary of Activity Relating to the Company's RSUs

The following table summarizes the activity relating to the Company’s RSUs for the nine months ended September 30, 2021:

	Number of RSUs	Weighted-Average Fair Value Per Share
Outstanding and unvested December 31, 2020	401,234	$	46.92
Granted	827,466	$	26.47
Forfeited	(190,166)	$	38.43
Vested	(159,185)	$	44.14
Outstanding and unvested September 30, 2021	879,349	$	30.02

Summary of Activity Relating to the Company's PBRSU's

The following table summarizes the activity relating to the Company's PBRSUs for the nine months ended September 30, 2021:

	Number of PBRSUs	Weighted-average fair value per share
Outstanding December 31, 2020	—	$	—
Granted	64,200	$	22.52
Forfeited	(18,900)	$	22.52
Outstanding and unvested September 30, 2021	45,300	$	22.52