Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 32,044	$ 36,956
Finished goods	17,960	21,598
Inventories, net	50,004	58,554
Service and sales demonstration inventory, net	$ 33,181	$ 33,349