Stock Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2023

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedule of Non-vested Restricted Stock Units Activity

The table below summarizes the restricted stock unit ("RSU") activity for the nine months ended September 30, 2023:

				Weighted-
				Average
	Shares			Fair Value
Unvested RSUs—December 31, 2022		31,288,688		$	10.34
Granted		12,357,201			8.95
Vested		(5,489,562	)		10.61
Forfeited		(1,409,181	)		9.92
Unvested RSUs—September 30, 2023		36,747,146			9.83

Summary of Share-based Compensation Arrangements by Share-based Payment Award

The table below summarizes the stock option activity for the nine months ended September 30, 2023:

						Weighted-
						Average
				Weighted-		Remaining		Aggregate
				Average		Contractual		Intrinsic
				Exercise		Life		Value
	Shares			Price		(in years)		(in thousands)
Options outstanding—December 31, 2022		45,249,260		$	2.99		4.9	$	258,470
Exercised		(8,122,930	)		2.86
Forfeited and canceled		(493,652	)		6.96
Options outstanding—September 30, 2023		36,632,678		$	2.96		4.3	$	380,524
Options exercisable—September 30, 2023		34,638,157		$	2.79		4.1	$	365,947
Options vested and expected to vest—September 30, 2023		36,547,087		$	2.95		4.3	$	379,910

Summary of Share-based Payment Arrangement, Expensed and Capitalized, Amount

Stock-Based Compensation—Stock-based compensation expense has been recorded in the accompanying condensed consolidated statements of operations and comprehensive (loss) income as follows for the three and nine months ended September 30, 2023 and 2022 (in thousands):

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Cost of revenues	$	2,396	$	1,657	$	6,595	$	4,167
Research and development		6,359		5,373		18,833		14,433
Sales and marketing		9,257		6,890		25,264		18,331
General and administrative		21,739		14,802		53,779		43,838
Total stock-based compensation expense	$	39,751	$	28,722	$	104,471	$	80,769

2021 Employee Stock Purchase Plan [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of the ESPP purchase rights sold during the nine months ended September 30, 2023 was estimated using the Black-Scholes option pricing model with the following assumptions:

Expected term (in years)	0.5
Expected volatility	30%—51%
Expected dividend yield	0%
Risk-free interest rate	2.5%—4.7%