Stockholders' Equity and Stock Based Compensation - Narrative (Details)		1 Months Ended				12 Months Ended
	Sep. 21, 2021 USD ($)	Sep. 30, 2021 USD ($) target tranche $ / shares shares	Aug. 31, 2021 shares	Jan. 31, 2020 USD ($)	May 31, 2019 shares	Dec. 31, 2021 USD ($) period vote $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, authorized (in shares)						10,000,000	0
Preferred stock, par value (in dollars per share) | $ / shares						$ 0.00001	$ 0.00001
Common stock, par value (in dollars per share) | $ / shares						$ 0.00001	$ 0.00001
Total shares of common stock reserved for issuance (in shares)						91,697,000	199,943,000
Employee contributions withheld | $						$ 4,200,000
Stock-based compensation expense | $							$ 43,280,000	$ 273,000
Contractual term						10 years
Intrinsic value of option exercised | $						$ 14,000,000	9,800,000	$ 9,500,000
Secondary transaction
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $							43,200,000
Secondary transaction | General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $				$ 10,800,000
Secondary Transaction - Repurchase of Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $							32,400,000
Secondary Transaction - Repurchase of Common Stock | Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $							15,900,000
Secondary Transaction - Repurchase of Common Stock | General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $							16,500,000
Share-base compensation expense, excess value | $							$ 10,800,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Offering period						24 months
Number of purchase periods | period						4
Purchase period						6 months
Stock-based compensation expense | $						$ 3,500,000
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						4 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares of common stock reserved for issuance (in shares)						429,000	0
Stock-based compensation expense | $	$ 0					$ 173,443,000
Award vesting period						4 years
Number of shares approved for grant (in shares)						26,808,000
Performance Based Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $						$ 9,000,000
Performance Based Restricted Stock Units (PRSUs) | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $						$ 8,400,000
Number of shares approved for grant (in shares)		6,000,000			166,390
Number of threshold stock price targets | target		5
Number of threshold vesting tranches | tranche		5
Trading day period		60 days
Total grant date fair value | $		$ 131,000,000
Performance Based Restricted Stock Units (PRSUs) | Chief Executive Officer | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold stock price target (in USD per share) | $ / shares		$ 70.00
Performance Based Restricted Stock Units (PRSUs) | Chief Executive Officer | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold stock price target (in USD per share) | $ / shares		$ 200.00
2021 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares of common stock reserved for issuance (in shares)						36,019,000	0
2021 Equity Incentive Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares of common stock reserved for issuance (in shares)			35,000,000			36,018,956
Percent of annual increase in capital shares reserved for future issuance			5.00%
Maximum amount of reduction to reserve (in shares)						51,178,920
2021 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares of common stock reserved for issuance (in shares)						6,500,000	0
2021 Employee Stock Purchase Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)						431,886
Shares cancelled and added to reserve (in shares)						1,439,884
Shares purchased under ESPP (in shares)						0
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, authorized (in shares)						1,000,000,000	0
Common stock, number of votes per share | vote						1
Common stock, par value (in dollars per share) | $ / shares						$ 0.00001	$ 0.00001
Class A Common Stock | 2021 Employee Stock Purchase Plan | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares of common stock reserved for issuance (in shares)			6,500,000
Purchase price of common stock in percent						85.00%
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, authorized (in shares)						350,000,000	0
Common stock, number of votes per share | vote						10
Common stock, par value (in dollars per share) | $ / shares						$ 0.00001	$ 0.00001