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Net Loss Per Share Attributable to Common Stockholders (Tables) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Earnings Per Share [Abstract] |  |
Schedule of Antidilutive Securities Excluded From Computation of Earnings Per Share |
|  | March 31, |
|  | 2022 |  |  | 2021 |
Redeemable convertible preferred stock |  |  | — |  |  |  | 22,359,669 |
Options to purchase common stock |  |  | 8,113,589 |  |  |  | 2,871,594 |
Unvested shares of restricted common stock from early exercises |  |  | 17,820 |  |  |  | 34,647 |
Restricted stock units |  |  | 702,663 |  |  |  | — |
Restricted stock units—executive officer |  |  | 952,804 |  |  |  | — |
Total |  |  | 9,786,876 |  |  |  | 25,265,910 |
|  | December 31, |
|  | 2021 |  |  | 2020 |
Redeemable convertible preferred stock |  |  | 24,785,564 |  |  |  | 14,388,857 |
Options to purchase common stock |  |  | 5,598,073 |  |  |  | 1,910,310 |
Unvested shares of restricted common stock from early exercises |  |  | 757 |  |  |  | 41,834 |
Restricted stock units |  |  | 952,804 |  |  |  | — |
Total |  |  | 31,337,198 |  |  |  | 16,341,001 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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