Description of Business, Basis of Presentation, and Operating Segment (Details) $ in Millions		9 Months Ended
	Mar. 01, 2019 USD ($) product	Sep. 30, 2020 Segment product
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of late stage development products | product		3
Segment Reporting Information [Line Items]
Number of reportable operating segment | Segment		1
Sale | Commercial Product Portfolio
Segment Reporting Information [Line Items]
Number of products | product	7
Consideration	$ 158.8
Consideration held in escrow	4.0
Aggregate amount receivable based on achievement of milestones	140.0
Payments receivable based on achievement of regulatory milestones	40.0
Potential payments based on achievement of sales milestones	$ 100.0