Commitments and Contingencies - Tradipitant - Additional Information (Details) - Tradipitant - USD ($) $ in Millions	3 Months Ended	120 Months Ended
	Mar. 31, 2022	Mar. 31, 2022
Commitments and Contingencies [Line Items]
Future percentage of royalty payments based net sales	low double digits
Development and milestone obligations paid to third party		$ 3.0
Pre-NDA Approval Milestones
Commitments and Contingencies [Line Items]
Possible future milestone payment	$ 2.0
Regulatory Approval Milestone | U.S.
Commitments and Contingencies [Line Items]
Possible future milestone payment	10.0
Regulatory Approval Milestone | E.U.
Commitments and Contingencies [Line Items]
Possible future milestone payment	5.0
Sales Milestone
Commitments and Contingencies [Line Items]
Possible future milestone payment	$ 80.0