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Net Loss Per Share Attributable To Common Stockholders | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Net Loss Per Share Attributable To Common Stockholders | 14. NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS The following outstanding potentially dilutive shares were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented, because including them would have been anti-dilutive (on an as-converted basis).
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Redeemable convertible preferred stock |  |  | — |  |  |  | 1,209,599 |  |  |  | — |  |  |  | 1,209,599 |
Class A common stock options issued and outstanding |  |  | 2,894,671 |  |  |  | 164,588 |  |  |  | 2,894,671 |  |  |  | 164,588 |
Unvested restricted stock awards |  |  | 4,137 |  |  |  | — |  |  |  | 4,137 |  |  |  | — |
Total |  |  | 2,898,808 |  |  |  | 1,374,187 |  |  |  | 2,898,808 |  |  |  | 1,374,187 |

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