Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Finished goods	$ 29,597	$ 60,766
Contract assets	41,164	37,843
Work-in-process	9,767	5,143
Raw materials	28,367	12,708
Inventories - net	$ 108,895	$ 116,460