Disaggregated Revenues - Schedule of Disaggregation of Revenue by Nature (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 226,771	$ 192,103	$ 653,534	$ 507,380
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	178,576	168,542	495,042	468,525
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	90,824	81,416	257,906	223,708
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	42,650	40,849	115,420	108,198
ONAPGO
Disaggregation of Revenue [Line Items]
Total revenues	17,075	6,806	38,996	8,410
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	10,213	10,043	28,103	34,037
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	7,957	12,016	24,161	33,851
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	6,490	10,387	20,541	38,183
Other
Disaggregation of Revenue [Line Items]
Total revenues	3,367	7,025	9,915	22,138
Collaboration revenue (ZURZUVAE)
Disaggregation of Revenue [Line Items]
Total revenues	41,697	20,164	104,690	20,164
Royalty, licensing, and other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 6,498	$ 3,397	$ 53,802	$ 18,691