Stock-Based Compensation and Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2023

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,
		2023		2022

Cost of revenue		$	4,161	$	3,860
Research and development		8,410		7,082
Sales and marketing		5,817		4,775
General and administrative		11,165		10,591
		$	29,553	$	26,308

Schedule of Stock Option 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, 2022	8,748,309	$	20.70	4.6	40,532

Exercised	(114,526)	6.71

Expired	(156,405)	30.45
Balances at March 31, 2023	8,477,378	20.71		4.4	42,208
Vested and expected to vest at March 31, 2023	8,474,492	20.71		4.4	42,171
Exercisable at March 31, 2023	8,417,352	$	20.81	4.4	41,425

The following table presents the stock activity and the total number of shares available for grant under our stock plans:


						Plan Shares Available for Grant

Balances at December 31, 2022						28,340,641
Added to plan						8,948,255
Granted						(3,851,435)

Cancelled/Forfeited						223,447
Expired						(138,839)
Balances at March 31, 2023						33,522,069

Schedule of Stock Award Activity

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, 2022	9,549,035	$	19.99
Granted	4,115,300	18.99
Vested	(2,104,904)	17.81
Forfeited	(126,807)	28.80
Unvested Balance at March 31, 2023	11,432,624	$	19.93