Disaggregated Revenues - Summary of Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 667,238	$ 579,775	$ 520,397
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	649,432	567,504	509,350
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	261,221	304,817	319,640
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	115,345	110,708	98,725
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	104,421	9,778	0
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	75,305	99,233	74,296
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	61,322	9,879	0
Other
Disaggregation of Revenue [Line Items]
Total revenues	31,818	33,089	16,689
Royalty revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 17,806	$ 12,271	$ 11,047