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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Summary of Common Shares Reserved for Future Issuance | The Company had reserved shares of common stock for possible future issuance as of December 31, 2021 and 2020 as follows:
| December 31,
| 2021 |  | 2020
Common stock warrants outstanding | 2,500,000 |  |  | 2,500,000 |
Stock options outstanding | 8,085,793 |  |  | 8,479,979 |
Restricted stock units outstanding | 1,247,723 |  |  | 417,105 |
Shares available for issuance pursuant to Convertible Notes | 14,340,786 |  |  | 15,879,948 |
Shares available for future grants of awards under the 2018 Omnibus Incentive Compensation Plan | 3,311,023 |  |  | 2,849,488 |
Shares available under the 2000 Employee Stock Purchase Plan | 170,811 |  |  | 391,201 |
Total shares of common stock reserved for issuance | 29,656,136 |  |  | 30,517,721 |

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