Inventories - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Capitalized direct labor expense included in work in process	$ 1.7	$ 1.2
Rental depreciation expense under short-term leases with purchase options	$ 3.0	$ 3.4