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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Statutory federal income tax rate | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% |
Effective income tax rate | (0.10%) | (0.20%) | (0.10%) | (0.60%) | 1.40% | 0.70% |
Valuation allowance |  |  |  |  | $ 75,826 | $ 60,937 |
Federal operating loss carryforwards |  |  |  |  | 215,500 |  |
Net operating loss carryforwards |  |  |  |  | 149,900 |  |
Tax credit carryforwards |  |  |  |  | 5,678 | 4,989 |
Unrecognized tax benefits |  |  |  |  | 5,000 | 4,283 | $ 3,811
Provision for income taxes | $ 21 | $ 55 | $ 222 | $ 348 | (952) | (598) |
Maximum [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Valuation allowance |  |  |  |  | 14,900 |  |
Provision for income taxes | $ 100 |  |  |  |  |  |
Domestic Tax Jurisdiction [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Valuation allowance |  |  |  |  | 75,800 |  |
Tax credit carryforwards |  |  |  |  | 5,700 |  |
Foreign Tax Jurisdiction [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Valuation allowance |  |  |  |  |  | $ 60,900 |
Foreign tax credits |  |  |  |  | 97,200 |  |
State and Local Jurisdiction [Member] |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |
Tax credit carryforwards |  |  |  |  | $ 4,300 |  |

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