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Net Loss Per Share | 3 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Net Loss Per Share | Net Loss Per Share The following outstanding potentially dilutive shares have been excluded from the calculation of diluted net loss per share due to their anti-dilutive effect:
| Three Months Ended March 31,
| 2021 |  | 2020
Stock options to purchase common stock | 3,560,541 |  |  | 2,399,195 |
Unvested restricted stock units | — |  |  | 525,177 |
Convertible promissory notes | — |  |  | 2,378,753 |
Total | 3,560,541 |  |  | 5,303,125 |

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