Disaggregated Revenues - Summary of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 177,353	$ 148,464	$ 499,910	$ 420,725
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	172,724	145,532	485,647	412,541
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	69,599	80,935	204,033	231,531
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	30,528	29,728	88,007	82,120
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	27,878	0	75,179	0
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	18,326	2,370	37,708	2,685
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	18,261	24,627	57,156	73,338
Other
Disaggregation of Revenue [Line Items]
Total revenues	8,132	7,872	23,564	22,867
Royalty revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,629	$ 2,932	$ 14,263	$ 8,184