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Stockholders' Deficit (Shares Reserved for Future Issuance) (Details) - shares | Sep. 30, 2024 | Dec. 31, 2023
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Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Stock options outstanding | 3,934,731 | 3,165,216
Shares issuable under the Employee stock purchase plan | 11,890 |
Shares available for future grants under the 2016 Plan | 3,219,158 |
Warrants outstanding | 19,365,847 |
Shares issuable upon the conversion of convertible debt | 22,495,614 |
Total shares reserved | 49,257,240 |
Restricted stock unit |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Unvested restricted stock units | 230,000 |
Equity Incentive Plan 2016 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Shares available for future grants under the 2016 Plan | 3,219,158 |

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