Disaggregated Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 175,689	$ 153,880	$ 487,658	$ 443,207
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	170,302	149,004	471,301	417,915
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	62,359	37,081	166,857	93,840
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	35,657	32,889	93,922	87,650
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	29,805	29,644	86,265	82,359
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	19,867	21,510	53,811	56,324
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	15,318	20,625	48,393	74,734
Other
Disaggregation of Revenue [Line Items]
Total revenues	7,296	7,255	22,053	23,008
Royalty, licensing and other revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 5,387	$ 4,876	$ 16,357	$ 25,292