Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 35,219	$ 29,955
Finished goods	20,288	17,436
Inventories, net	55,507	47,391
Service and sales demonstration inventory, net	$ 31,025	$ 31,831