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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2025
Stockholders Equity Note [Abstract] |
Schedule of Common Stock Reserved for Future Issuance | The Company had reserved shares of common stock for future issuance as shown in the table below:
|  | September 30, 2025 |  |  | December 31, 2024 |
Shares of common stock reserved for future issuance upon exercise of outstanding warrants and pre-funded warrants |  |  | 19,100,800 |  |  |  | 32,915,346 |
Shares of common stock reserved for future issuance under the 2019 Stock Incentive Plan, as amended |  |  | 9,165,995 |  |  |  | 7,555,310 |
Shares of common stock reserved for future issuance under the 2019 Employee Stock Purchase Plan |  |  | 1,116,075 |  |  |  | 1,131,973 |
Shares of common stock reserved for future issuance under the 2012 Stock Incentive Plan |  |  | 278,418 |  |  |  | 288,944 |
|  |  | 29,661,288 |  |  |  | 41,891,573 |
Warrant Activity Including Activity Related To Pre-funded Warrants | Warrants Warrant activity, including activity related to pre-funded warrants, is shown in the table below:
|  | Number of Pre-funded Warrant Shares |  |  | Number of Common Stock Warrant Shares |  |  | Total Number of Warrant Shares |  |  | Weighted Average Exercise Price |
Outstanding as of December 31, 2024 |  |  | 23,211,642 |  |  |  | 9,703,704 |  |  |  | 32,915,346 |  |  | $ | 0.40 |
Exercised |  |  | (5,962,694 | ) |  |  | (7,851,852 | ) |  |  | (13,814,546 | ) |  | $ | 1.37 |
Outstanding as of September 30, 2025 |  |  | 17,248,948 |  |  |  | 1,851,852 |  |  |  | 19,100,800 |  |  | $ | 0.13 |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of the Company’s combined stock option activity for the 2019 Plan and the 2012 Plan is as follows:
|  | Number of Option Shares |  |  | Weighted Average Exercise Price |
Outstanding as of December 31, 2024 |  |  | 7,844,254 |  |  | $ | 3.08 |
Granted |  |  | 2,997,550 |  |  | $ | 4.67 |
Exercised |  |  | (772,857 | ) |  | $ | 2.40 |
Forfeited |  |  | (624,534 | ) |  | $ | 3.35 |
Expired |  |  | — |  |  | $ | — |
Outstanding as of September 30, 2025 |  |  | 9,444,413 |  |  | $ | 3.62 |
Options exercisable as of September 30, 2025 |  |  | 5,016,112 |  |  | $ | 3.38 |
Options unvested as of September 30, 2025 |  |  | 4,428,301 |  |  | $ | 3.88 |
Schedule of Stock-based Compensation Expenses Recognized | The following table summarizes the classifications of stock-based compensation expenses for the 2012 Plan, the 2019 Plan and the 2019 ESPP recognized in the Condensed Consolidated Statements of Comprehensive Loss:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
General and administrative expense |  | $ | 705 |  |  | $ | 526 |  |  | $ | 2,175 |  |  | $ | 1,596 |
Research and development expense |  |  | 538 |  |  |  | 296 |  |  |  | 1,660 |  |  |  | 1,075 |
Total stock-based compensation expenses |  | $ | 1,243 |  |  | $ | 822 |  |  | $ | 3,835 |  |  | $ | 2,671 |

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