Equity Incentive Plans

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Equity Incentive Plans

Equity Incentive Plans

Equity Incentive Plan Activity

A summary of share-based awards available for grant under the 2016 Equity Incentive Plan is as follows:

	Awards Available for Grant
Balance at December 31, 2019	5,528,132
Additional awards authorized	1,333,928
Awards granted	(595,915)
Awards forfeited	156,623
Awards withheld for tax purposes	82,622
Balance at December 31, 2020	6,505,390
Additional awards authorized	1,450,967
Awards granted	(969,249)
Awards forfeited	208,573
Awards withheld for tax purposes	135,886
Balance at September 30, 2021	7,331,567

During the nine months ended September 30, 2021, 791,117 restricted stock units (“RSUs”) were granted, 268,099 RSUs vested, and 109,982 RSUs were forfeited.

The following table summarizes stock option activity under the 2006 and 2016 Equity Incentive Plans:

		Options Outstanding
	Options Outstanding	Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Life (years)	Aggregate Intrinsic Value (in thousands)
Balance at December 31, 2019	1,503,247	$	27.40	6.43	$	62,401
Options exercised	(868,614)	$	17.31
Options forfeited	(24,752)	$	66.89
Balance at December 31, 2020	609,881	$	40.18	6.24	$	120,163
Options exercised	(79,410)	$	29.88
Options forfeited	(11,857)	$	66.93
Balances at September 30, 2021	518,614	$	41.15	5.49	$	10,909
Options exercisable – September 30, 2021	481,133	$	38.81	5.40	$	10,909
Options vested and expected to vest – September 30, 2021	518,016	$	41.11	5.48	$	10,909

The aggregate intrinsic values of options outstanding, exercisable, vested and expected to vest were calculated as the difference between the exercise price of the options and the closing price of the Company’s common stock.

The Company did not grant any options during the nine months ended September 30, 2021, and 2020.