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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2021

Stockholders' Equity [Abstract]

Summary of Stock Option Activity

		Stock Options Outstanding
							Weighted
		Number					average
		of shares		Exercise price			exercise price
Outstanding at December 31, 2020		14,638		$	1.16 – 20.90		$	5.53
Granted		2,229			23.39 – 46.37			34.68
Exercised		(4,058)			1.16 – 15.98			5.49
Canceled		(474)			2.54 – 46.37			4.68
Outstanding at June 30, 2021		12,335		$	1.16 – 46.37		$	10.84

Summary of Time-Based RSUs Activity

			Weighted average
	Number		grant date
	of shares		fair value
Outstanding at December 31, 2020	5,919		$	5.25
Granted	2,579			39.62
Released	(1,489)			4.39
Forfeited	(189)			12.47
Outstanding at June 30, 2021	6,820		$	18.23

Summary of Performance-Based RSUs Activity

			Weighted average
	Number		grant date
	of shares		fair value
Outstanding at December 31, 2020	94		$	2.63
Granted	—			—
Released	—			—
Forfeited	(94)			2.63
Outstanding at June 30, 2021	—		$	—

Schedule of Stock-Based Compensation Expense

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Cost of revenue	$	1,906		$	452		$	2,898		$	979
Research and development		4,310			1,433			7,357			3,192
Sales, general and administrative		9,589			1,349			15,715			3,095
Total stock-based compensation expense	$	15,805		$	3,234		$	25,970		$	7,266

Schedule of Fair Value of Employee Stock Options

	Three Months Ended June 30,				Six Months Ended June 30,
Stock Option	2021		2020		2021		2020
Expected term in years	4.6		—		4.6		5.1
Expected volatility	70%		—		68% - 70%		57%
Risk-free interest rate	0.74%		—		0.50% - 0.74%		1.20%
Dividend yield	—		—		—		—
Weighted average grant date fair value per share	$14.54		—		$18.86		$1.22

Schedule of Fair Value of Employee Stock Purchase Plan

	Six Months Ended June 30,
ESPP	2021		2020
Expected term in years	0.5 - 2.0		0.5 - 2.0
Expected volatility	68%		57%
Risk-free interest rate	0.07% - 0.13%		0.8% - 1.0%
Dividend yield	—		—
Weighted average fair value per share	$29.26		$1.62

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