Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Share-based Payment Arrangement [Abstract]

Summary of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense recognized for the three months ended March 31, 2022 and 2021 as follows:

	Three Months Ended March 31,
	2022		2021
Research and development	$	2,354	$	1,207
Sales and marketing	2,879		1,838
General and administrative	72,692		7,900
Total stock-based compensation expense	$	77,925	$	10,945

Summary of Stock Option and RSU Activity

Stock option and RSU activity during the three months ended March 31, 2022 is as follows (in thousands, except for share, per share, and contractual term data):

		Options Outstanding						Restricted Stock Units
	Number of Shares Available for Issuance Under the Plan	Number of Shares Outstanding Under the Plan	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value		Number of Plan shares outstanding	Weighted-Average Grant Date Fair Value per share
Balance at December 31, 2021	51,437,898	27,727,088	$	7.79	7.04	$	113,110	7,600,097	$	13.17
Additional shares authorized	20,437,691	—	—
Options and restricted stock units granted	(6,062,088)	—	—					6,062,088	2.86
Options exercised and restricted stock units released	—	(774,983)	0.30					(104,953)	18.65
Options and restricted stock units canceled	868,193	(198,648)	1.26					(669,545)	11.94
Balance at March 31, 2022	66,681,694	26,753,457	$	8.06	6.88	$	40,977	12,887,687	$	8.34
Exercisable at December 31, 2021		13,157,036	$	0.15	5.17	$	95,946
Exercisable at March 31, 2022		12,842,842	0.16		5.09	36,610
Unvested at December 31, 2021		14,570,052	14.69		8.72	17,164
Unvested at March 31, 2022		13,910,615	15.36		8.53	4,367