Stock Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2024

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, 2024:

				Weighted-
				Average
	Shares			Fair Value
Unvested RSUs—December 31, 2023		36,329,881		$	10.56
Granted		10,371,334			11.85
Vested		(14,007,032	)		10.77
Forfeited		(1,146,672	)		10.57
Unvested RSUs—September 30, 2024		31,547,511			10.89

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, 2024:

						Weighted-
						Average
				Weighted-		Remaining		Aggregate
				Average		Contractual		Intrinsic
				Exercise		Life		Value
	Shares			Price		(in years)		(in thousands)
Options outstanding—December 31, 2023		35,788,469		$	2.96		4.0	$	301,563
Exercised		(8,743,936	)		2.74
Forfeited and canceled		(11,920	)		3.40
Options outstanding—September 30, 2024		27,032,613		$	3.04		3.4	$	216,631
Options exercisable—September 30, 2024		26,171,215		$	2.91		3.3	$	212,962
Options vested and expected to vest—September 30, 2024		27,008,353		$	3.03		3.3	$	216,537

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 income (loss) as follows for the three and nine months ended September 30, 2024 and 2023 (in thousands):

	For the Three Months Ended				For the Nine Months Ended
	September 30,				September 30,
	2024		2023		2024		2023
Cost of revenues	$	2,297	$	2,396	$	7,051	$	6,595
Research and development		12,164		6,359		34,750		18,833
Sales and marketing		6,637		9,257		19,150		25,264
General and administrative		21,027		21,739		66,270		53,779
Total stock-based compensation expense	$	42,125	$	39,751	$	127,221	$	104,471

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, 2024 was estimated using the Black-Scholes option pricing model with the following assumptions:

Expected term (in years)	0.5
Expected volatility	25%-29%
Expected dividend yield	0%
Risk-free interest rate	5.2%-5.5%