Disaggregated Revenues - Summary of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 170,051	$ 141,329	$ 322,557	$ 272,261
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	165,459	138,628	312,923	267,009
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	71,602	78,777	134,434	150,596
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	29,958	25,022	57,479	52,392
GOCOVRI
Disaggregation of Revenue [Line Items]
Total revenues	24,700	0	47,301	0
APOKYN
Disaggregation of Revenue [Line Items]
Total revenues	20,447	26,981	38,895	48,711
Qelbree
Disaggregation of Revenue [Line Items]
Total revenues	11,099	315	19,382	315
Other
Disaggregation of Revenue [Line Items]
Total revenues	7,653	7,533	15,432	14,995
Royalty revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,592	$ 2,701	$ 9,634	$ 5,252