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Stockholders' Equity - Early Exercise of Stock Options (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) shares
Common Class B |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares subject to repurchase (in shares) | shares | 90,977
Stock options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Plan modification, number of awards affected (in shares) | shares | 47,882
Plan modification, exercise value of awards affected | $ | $ 0.2
Other long-term liabilities | $ | $ 0.4

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