Equity Method Investments - Summary of Unaudited Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Product revenue	$ 65,155	$ 19,590	$ 152,963	$ 45,073
Loss from operations	2,813	(12,807)	(14,854)	(49,797)
Net income (loss)	1,948	$ (12,932)	(22,078)	$ (49,825)
JV Agreement with Genesis MedTech
Schedule Of Equity Method Investments [Line Items]
Loss from operations	758		13,033
Net income (loss)	$ 758		$ 13,033