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v3.25.3

License and Acquired Intangibles, Net - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Amortization of intangible assets |  |  | $ 28,033,000 | $ 28,033,000 |
Impairment charges recognized on definite-lived intangibles | $ 0 | $ 0 | $ 0 | 0 |
Finite-Lived Intangible Assets, Remaining Amortization Period | 4 years 8 months 12 days |  | 4 years 8 months 12 days |  | 5 years 4 months 24 days
License and Acquired Intangibles for RUZURGI [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life | 14 years 6 months |  | 14 years 6 months |  |
Amortization of intangible assets | $ 500,000 | 500,000 | $ 1,700,000 | 1,700,000 |
License and Acquired Intangibles for FYCOMPA [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life | 5 years |  | 5 years |  |
Amortization of intangible assets | $ 7,900,000 | 7,900,000 | $ 23,700,000 | 23,700,000 |
Licensed And Acquired Intangibles For AGAMREE [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life | 10 years 6 months |  | 10 years 6 months |  |
Amortization of intangible assets | $ 900,000 | $ 900,000 | $ 2,600,000 | $ 2,600,000 |

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