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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 | 8. Net Loss Per Share Attributable to Common Stockholders The following table shows the computation of basic and diluted net loss per share (in thousands, except share and per share data):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Net loss |  | $ | (9,615 | ) |  | $ | (2,258 | ) |  | $ | (36,935 | ) |  | $ | (5,805 | )
Accretion of redeemable convertible preferred stock to redemption value and cumulative preferred stock dividends |  |  | (1,322 | ) |  |  | (461 | ) |  |  | (4,548 | ) |  |  | (1,352 | )
Net loss attributable to common stockholders |  |  | (10,937 | ) |  |  | (2,719 | ) |  |  | (41,483 | ) |  |  | (7,157 | )
Weighted-average common shares used in computed net loss per share attributable to common stockholders, basic and diluted |  |  | 15,585,611 |  |  |  | 1,863,860 |  |  |  | 7,554,300 |  |  |  | 1,859,713 |
Net loss per share attributable to common stockholders, basic and diluted |  | $ | (0.70 | ) |  | $ | (1.46 | ) |  | $ | (5.49 | ) |  | $ | (3.85 | )
All outstanding shares of redeemable convertible preferred stock were converted on a 1-for-1 basis to shares of common stock on August 12, 2021, the date of the Company's IPO (see Note 1). The cumulative preferred stock dividend was therefore eliminated upon conversion of the redeemable convertible preferred stock. The following outstanding shares of potentially dilutive securities were excluded from the computation of the diluted net loss per share attributable to common stockholders for the periods presented because their effect would have been anti-dilutive:
|  | Three and Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |
Common stock options |  |  | 2,737,315 |  |  |  | 366,501 |
Unvested restricted stock awards |  |  | 348,639 |  |  |  | 117,556 |
Redeemable convertible preferred stock |  |  | — |  |  |  | 3,999,133 |
Total potentially dilutive shares |  |  | 3,085,954 |  |  |  | 4,483,190 |

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