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Redeemable Convertible Preferred Stock Warrant Liabilities (Tables) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2025 | Dec. 31, 2024
Temporary Equity Disclosure [Abstract] |  |
Schedule of redeemable convertible preferred stock warrant liabilities | As of September 30, 2025, the Company had the following liability classified warrants to purchase shares of its common stock outstanding (in thousands, except exercise price per share):
|  | Shares Underlying Warrants |  |  | Exercise Price Per Share |  |  | Expiration Date |
PIPE Warrants |  |  | 17,769 |  |  | $ | 12.00 |  |  |  | 9/24/2031 |
NRA Warrants |  |  | 7,607 |  |  | $ | 12.00 |  |  |  | 9/24/2031 |
Total outstanding |  |  | 25,376 |  |  |  |  |  |  |  |  |
| As of December 31, 2024, outstanding warrants to purchase the Company’s redeemable convertible preferred stock were as follows (in thousands, except exercise price per share):
|  | Shares Underlying Warrants |  |  | Series of Redeemable Convertible Preferred Stock |  | Exercise Price Per Share |  |  | Expiration Date
Warrants issued with services agreement |  |  | 486 |  |  | Series A |  | $ | 0.001 |  |  | August 2028
Warrants issued with debt arrangement |  |  | 303 |  |  | Series A |  | $ | 1.482 |  |  | December 2028
Warrants issued with debt arrangement |  |  | 540 |  |  | Series A |  | $ | 1.482 |  |  | June 2031
Warrants issued with 2022 Credit Facility |  |  | 640 |  |  | Series B-2 |  | $ | 2.344 |  |  | September 2032
Total outstanding |  |  | 1,969 |  |  |  |  |  |  |  |  |

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