Disaggregated Revenues - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Non-cash royalty revenue	$ 2.3	$ 2.2
Revenue from Contract with Customer Benchmark | Product Concentration Risk | Trokendi XR
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)	25.00%	43.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | AmerisourceBergen Drug Corporation
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)	20.00%		20.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Cardinal Health
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)	20.00%		20.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | McKesson
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)	20.00%		20.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Three Major Customers
Disaggregation of Revenue [Line Items]
Concentration risk percentage (more than)	75.00%		75.00%