Liability Related to the Revenue Interest Purchase Agreement - Summary of Interest Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Liability From Sale Of Future Revenues [Roll Forward]
Revenue interest payments	$ (3,389)	$ (500)	$ 0
Revenue Interest Purchase Agreement (RIPA)
Liability From Sale Of Future Revenues [Roll Forward]
Revenue interest liability, beginning balance	176,604	132,544
Oberland funding	49,917	25,000
Interest expense recognized	33,907	19,560
Revenue interest payments	(3,389)	(500)
Revenue interest liability, ending balance	257,039	$ 176,604	$ 132,544
Issuance costs	$ 83