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Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Share-based Payment Arrangement [Abstract]

Schedule of Stock-based Awards

The following table summarizes the stock options activity under the 2010 Plan and 2019 Plan for the three months ended March 31, 2022:

			Stock Options Outstanding
			(in thousands, except year and per share data)
			Shares Subject to Options Outstanding						Weighted- Average Exercise Price per Option						Weighted- Average Remaining Contractual Terms (in years)						Aggregate Intrinsic Value
Balances as of December 31, 2021			13,603						$	12.47					6.0						$	1,726,440
Options granted			—						$	—
Options exercised			(857)						$	3.49											$	87,101
Options canceled/forfeited/expired			(3)						$	2.77
Balances as of March 31, 2022			12,743						$	15.13					5.75						$	1,437,112
Vested and expected to vest as of March 31, 2022			12,739						$	4.91					5.75						$	1,436,612
Exercisable as of March 31, 2022			11,793						$	2.62					5.56						$	1,380,741

Schedule of Restricted Stock Units Activity

RSU and restricted stock activity for the three months ended March 31, 2022 was as follows:

			Restricted Stock and RSUs						Weighted-Average Grant Date Fair Value
			(in thousands, except per share data)
Unvested and outstanding as of December 31, 2021			7,456						$	47.36
Granted - RSUs			863						$	102.25
Granted - Restricted stock			52						$	100.29
Vested - RSUs			(709)						$	31.63
Vested - Restricted stock			(655)						$	100.29
Forfeited			(173)						$	48.17
Unvested as of March 31, 2022			6,834						$	55.45
Vested and not yet released			—						$	—
Outstanding as of March 31, 2022			6,834						$	55.45

Schedule of Fair Value Assumptions for Employee Stock Purchase Plan

The weighted-average assumptions used to determine the fair value of the ESPP during the periods presented were as follows:

			Three Months ended March 31,
			2022						2021
Expected term (in years)			0.5						0.5
Risk-free interest rate			0.1		%				0.1		%
Expected volatility			44.0		%				59.7		%
Dividend yield			—		%				—		%

Schedule of Stock-based Compensation Expense

The following table sets forth the total stock-based compensation expense included in the Company’s condensed consolidated statements of operations:

			Three Months Ended March 31,
			2022						2021
			(in thousands)
Cost of revenue			$	1,078					$	414
Sales and marketing			8,919						5,645
Research and development			18,829						8,364
General and administrative			5,139						3,615
Total stock-based compensation expense			$	33,965					$	18,038

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