Disaggregated Revenues - Schedule of Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total revenues	$ 192,103	$ 175,689	$ 507,380	$ 487,658
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	168,542	170,302	468,525	471,301
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	81,416	62,359	223,708	166,857
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	40,849	35,657	108,198	93,922
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	10,387	19,867	38,183	53,811
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	10,043	15,318	34,037	48,393
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	12,016	29,805	33,851	86,265
ONAPGO
Disaggregation of Revenue [Line Items]
Total revenues	6,806	0	8,410	0
Other
Disaggregation of Revenue [Line Items]
Total revenues	7,025	7,296	22,138	22,053
Collaboration revenue (ZURZUVAE)
Disaggregation of Revenue [Line Items]
Total revenues	20,164	0	20,164	0
Royalty, licensing and other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,397	$ 5,387	$ 18,691	$ 16,357