Disaggregated Revenues Summary of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 94,976	$ 85,474
Trokendi XR
Disaggregation of Revenue [Line Items]
Total revenues	68,551	63,693
Oxtellar XR
Disaggregation of Revenue [Line Items]
Total revenues	23,939	19,406
Net product sales
Disaggregation of Revenue [Line Items]
Total revenues	92,490	83,099
Royalty revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,486	$ 2,375