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Equity Incentive Plans and Stock-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022 | Sep. 30, 2021 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 29, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares of common stock reserved for issuance (in shares) | 67,319,230 | 67,319,230 |  |  | 59,504,320 | 66,830,878
Aggregate intrinsic value of options outstanding | $ 62.2 | $ 62.2 |  |  | $ 153.2 |
Aggregate intrinsic value of options exercised |  | 10.5 | $ 0.5 |  |  |
Weighted-average grant date fair value of options granted (in dollars per share) |  |  | $ 3.58 |  |  |
Grant date fair value of options vested |  | $ 1.5 | $ 0.9 |  |  |
Granted (in shares) |  | 0 | 1,024,000 |  |  |
Earnout period | 5 years |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation cost | $ 30.3 | $ 30.3 |  |  |  |
Unrecognized compensation cost, period for recognition | 3 years 1 month 6 days |  |  |  |  |
Unvested RSUs | 6,198,000 | 6,198,000 |  |  | 4,041,000 |
Stock options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation cost | $ 1.5 | $ 1.5 |  |  |  |
Unvested options (in shares) | 7,600,000 | 7,600,000 |  |  |  |
Unrecognized compensation cost, period for recognition |  | 1 year 7 months 6 days |  |  |  |
ESPP |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of shares of common stock reserved for issuance (in shares) | 5,495,601 | 5,495,601 |  | 1,832,324 | 3,663,277 |
2021 Equity Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award expiration period |  | 10 years |  |  |  |
Award vesting period |  | 4 years |  |  |  |
Number of shares of common stock reserved for issuance (in shares) | 51,927,667 | 51,927,667 |  | 9,161,624 | 42,766,043 |
2021 Equity Incentive Plan | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Exercise price of stock options as percentage of fair value |  | 110.00% |  |  |  |
2014 Stock Option Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Award expiration period |  | 10 years |  |  |  |
Award vesting period |  | 4 years |  |  |  |
2014 Stock Option Plan | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Exercise price of stock options as percentage of fair value |  | 110.00% |  |  |  |

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