Disaggregated Revenues - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Non-cash royalty revenue	$ 2.5	$ 2.2	$ 4.7	$ 4.4
Revenue from Contract with Customer Benchmark | Product Concentration Risk | Trokendi XR
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)	43.00%	57.00%		56.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Three Major Customers
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)			80.00%	85.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | AmerisourceBergen Drug Corporation
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)			25.00%	25.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Cardinal Health
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)			25.00%	25.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | McKesson
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)			25.00%	25.00%