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v3.25.3

Fair Value Measurements - Schedule of Changes in the Estimated Fair Values (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning balance | $ 60,920 | $ 12,045 | $ 12,045 | $ 1,451
Issuance of SAFE |  |  | 45,192 | 10,000
Fair value remeasurement |  |  | 3,683 | (126)
Correction of an immaterial |  |  |  | 720
Ending balance |  |  | 60,920 | 12,045
Secured Debt [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Issuance of second lien loans | 43,865 |  |  |
Exchange of SAFE for second lien loan | 10,000 |  |  |
Fair value remeasurement | 23,938 |  |  |
Settlement via conversion or exercise | (67,380) |  |  |
Ending balance | 10,423 |  |  |
Simple Agreements For Future Equity [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning balance | 59,301 | 10,000 | 10,000 |
Issuance of SAFE | 23,660 | 44,054 | 45,192 | 10,000
Exchange of SAFE for second lien loan | (10,000) |  |  |
Fair value remeasurement | 190,075 |  | 4,109 |
Settlement via conversion or exercise | (263,036) |  |  |
Ending balance | 0 | 54,054 | 59,301 | 10,000
Redeemable Convertible Preferred Stock Warrants [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Beginning balance | 1,619 | 2,045 | 2,045 | 1,451
Fair value remeasurement | 7,272 | (321) | (426) | (126)
Correction of an immaterial |  |  |  | 720
Reclassification of Assumed Kodiak Warrants | (3,842) |  |  |
Settlement via conversion or exercise | (5,049) |  |  |
Ending balance | $ 0 | $ 1,724 | $ 1,619 | $ 2,045

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