Stock-Based Compensation Expense and Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2022

Schedule of Employee and Non-Employee Stock-Based Compensation Expense

The following table summarizes the components of stock-based compensation expense in the condensed consolidated statements of operations (in thousands):


	Three Months Ended March 31,
	2022		2021

Cost of revenue	$	3,860	$	2,999
Research and development	7,082		4,908
Sales and marketing	4,775		4,085
General and administrative	10,591		5,218
	$	26,308	$	17,210

Schedule of Stock Option and RSU Activity

The following table summarizes the stock option activity under our stock plans during the reporting period:


	Outstanding Options
	Number of Shares	Weighted Average Exercise Price		Remaining Contractual Life (Years)	Aggregate Intrinsic Value

					(in thousands)












Balances at December 31, 2021	10,737,295	$	21.23	5.2	$	60,304

Exercised	(149,662)
Cancelled	(188,289)
Balances at March 31, 2022	10,399,344	21.31		5.0	67,413
Vested and expected to vest at March 31, 2022	10,322,713	21.40		5.0	66,271
Exercisable at March 31, 2022	8,841,572	23.30		4.7	45,009

The following table presents the stock activity for the three months ended March 31, 2022 and the total number of shares available for grant under our stock plans as of March 31, 2022:


						Plan Shares Available for Grant


Balances at December 31, 2021						24,146,784
Added to plan						8,384,460
Granted						(3,972,652)

Cancelled						261,572
Expired						(161,292)
Balances at March 31, 2022						28,658,872

Schedule of RSU Activity and Related Information

A summary of our stock awards activity and related information is as follows:


	Number of Awards Outstanding	Weighted Average Grant Date Fair Value













Unvested Balance at December 31, 2021	8,367,664	$	20.52
Granted	3,841,604	19.82
Vested	(964,937)	15.95
Forfeited	(89,251)	18.53
Unvested Balance at March 31, 2022	11,155,080	20.07