Inventory - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory capitalized in advance of potential regulatory approval	$ 13,800,000	$ 15,300,000	$ 0
Capitalized inventory charged during period	$ 6,300,000