Common Stock - Schedule of Common Stock Reserved for Future Issuance (Details) - shares |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Class of Stock [Line Items] | ||
| Stock options issued and outstanding (in shares) | 18,816,169 | 17,270,870 |
| Total shares of common stock reserved (in shares) | 58,859,678 | 52,130,509 |
| Shares available for grant under 2021 Equity Incentive Plan | ||
| Class of Stock [Line Items] | ||
| Shares available for grant (in shares) | 33,345,527 | 29,341,567 |
| Shares available for grant under 2021 Employee Stock Purchase Plan | ||
| Class of Stock [Line Items] | ||
| Shares available for grant (in shares) | 6,697,982 | 5,518,072 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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