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Stockholders' Deficit (Shares Reserved for Future Issuance) (Details) - shares | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Stock options outstanding | 5,012,648 | 3,755,965
Shares issuable under the Employee stock purchase plan | 11,890 |
Shares available for future grants under the 2016 Plan | 2,169,950 |
Warrants outstanding | 10,655,047 |
Shares issuable upon the conversion of the Convertible Loan | 24,096,491 |
Total shares reserved | 42,098,526 |
Restricted stock unit |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Unvested restricted stock units | 152,500 |
Equity Incentive Plan 2016 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |
Shares available for future grants under the 2016 Plan | 2,169,950 |

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