Sale of Future Revenue - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended	2 Months Ended	3 Months Ended	12 Months Ended		14 Months Ended
	Nov. 03, 2020	Nov. 30, 2020	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Proceeds from sale of future revenue					$ 0	$ 50,000
Payments of financing costs	$ 2,909				0	2,909
Revenues					$ 50,832	$ 45,849
License Agreement with Sunovion Pharmaceuticals, Inc.
Disaggregation of Revenue [Line Items]
Minimum royalty receivable				$ 1,000
Period of guaranteed royalty				8 years
Monetization Agreement
Disaggregation of Revenue [Line Items]
Effective annual interest rate					24.90%		24.90%
Monetization Agreement | Marathon Pangolin Royalty LLC
Disaggregation of Revenue [Line Items]
Proceeds from sale of future revenue	40,000		$ 10,000				$ 50,000
Proceeds from debt, contingent on additional milestones		$ 75,000
Royalty
Disaggregation of Revenue [Line Items]
Revenues					$ (1,102)
Royalty | License Agreement with Sunovion Pharmaceuticals, Inc.
Disaggregation of Revenue [Line Items]
Revenues				$ 8,000
Maximum | Marathon Pangolin Royalty LLC
Disaggregation of Revenue [Line Items]
Proceeds from sale of future revenue	$ 125,000