Disaggregated Revenues - Schedule of Disaggregation of Revenue by Nature (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 219,058	$ 165,453	$ 426,763	$ 315,277
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	165,713	157,995	316,466	299,983
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	89,239	77,547	167,082	142,292
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	37,530	36,660	72,770	67,349
ONAPGO
Disaggregation of Revenue [Line Items]
Total revenues	13,546	1,604	21,921	1,604
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	8,411	11,193	17,890	23,994
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	8,782	11,637	16,204	21,835
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	6,323	12,820	14,051	27,796
Other
Disaggregation of Revenue [Line Items]
Total revenues	1,882	6,534	6,548	15,113
Collaboration revenue (ZURZUVAE)
Disaggregation of Revenue [Line Items]
Total revenues	35,350	0	62,993	0
Royalty, licensing, and other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 17,995	$ 7,458	$ 47,304	$ 15,294