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Net Loss Per Share | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Net Loss Per Share |
10. | Net Loss Per Share
The following outstanding potentially dilutive shares have been excluded from the calculation of diluted net loss per share for the periods presented due to their anti-dilutive effect:
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Convertible preferred stock |  |  | — |  |  |  | — |  |  |  | 45,374,836 |
Restricted stock subject to future vesting |  |  | 186,425 |  |  |  | 994,838 |  |  |  | 1,917,848 |
Options to purchase common stock |  |  | 12,654,998 |  |  |  | 8,442,824 |  |  |  | 5,063,688 |
Shares committed under ESPP |  |  | 86,677 |  |  |  | 44,464 |  |  |  | — |
Total |  |  | 12,928,100 |  |  |  | 9,482,126 |  |  |  | 52,356,372 |

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