Disaggregated Revenues - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition
Noncash royalty revenue	$ 9,400	$ 8,500	$ 6,900
Estimated adjustment for product returns related to prior year sales	(1,700)	13,800	400
Revenues	579,775	520,397	392,755
Trokendi XR
Revenue Recognition
Estimated adjustment for product returns related to prior year sales		10,700
Revenues	304,817	319,640	295,214
Net product sales
Revenue Recognition
Revenues	$ 567,504	$ 509,350	$ 383,400
Percentage of Net Product Sales | Product Concentration Risk | Trokendi XR
Revenue Recognition
Concentration risk percentage (more than)	50.00%	60.00%	70.00%