Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies - Use of Estimates and Purchase of Rights to Future Milestones and Royalties (Details)

v3.20.2
Basis of Presentation and Significant Accounting Policies - Use of Estimates and Purchase of Rights to Future Milestones and Royalties (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Purchase of Rights to Future Milestones and Royalties    
Impairment of long-term royalty receivable $ 0.0 $ 0.0