v3.26.1
License and Acquired Intangibles, Net - Schedule of Finite Lived Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 240,212 $ 240,212
Accumulated Amortization 118,241 108,538
Net Carrying Value 121,971 131,674
License and Acquired Intangibles for RUZURGI [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 33,569 33,569
Accumulated Amortization 8,639 8,059
Net Carrying Value 24,930 25,510
License and Acquired Intangibles for FYCOMPA [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 158,143 158,143
Accumulated Amortization 100,838 92,931
Net Carrying Value 57,305 65,212
Licensed And Acquired Intangibles For AGAMREE [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 48,500 48,500
Accumulated Amortization 8,764 7,548
Net Carrying Value $ 39,736 $ 40,952