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Inventories - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Inventory Disclosure [Abstract]          
Capitalized direct labor expense included in work in process $ 1.1   $ 1.1   $ 1.7
Rental depreciation expense $ 1.3 $ 0.9 $ 4.5 $ 2.4