Disaggregated Revenues - Summary of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 152,506	$ 130,932
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	147,464	128,381
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	62,832	71,819
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	27,521	27,370
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	22,601	0
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	18,448	21,730
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	8,283	0
Other
Disaggregation of Revenue [Line Items]
Total revenues	7,779	7,462
Royalty revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 5,042	$ 2,551