v3.26.1
License and Acquired Intangibles, Net - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 9,703,000 $ 9,345,000  
Impairment charges recognized on definite-lived intangibles $ 0 0  
Finite-Lived Intangible Assets, Remaining Amortization Period 4 years 4 months 24 days   4 years 8 months 12 days
License and Acquired Intangibles for RUZURGI [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 14 years 6 months    
Amortization of intangible assets $ 600,000 600,000  
License and Acquired Intangibles for FYCOMPA [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 5 years    
Amortization of intangible assets $ 7,900,000 7,900,000  
Licensed And Acquired Intangibles For AGAMREE [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 10 years 6 months    
Amortization of intangible assets $ 1,200,000 $ 900,000