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Common Stock - Schedule of Common Stock Reserved for Future Issuance (Details) - shares | Dec. 31, 2025 | Dec. 31, 2024
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Class of Stock [Line Items] |  |
Stock options issued and outstanding (in shares) | 17,270,870 | 16,634,775
Total shares of common stock reserved (in shares) | 52,130,509 | 44,927,574
2021 Equity Incentive Plan |  |
Class of Stock [Line Items] |  |
Shares available for grant (in shares) | 29,341,567 | 23,784,439
2021 Employee Stock Purchase Plan |  |
Class of Stock [Line Items] |  |
Shares available for grant (in shares) | 5,518,072 | 4,508,360

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