Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 32,659	$ 36,956
Finished goods	22,385	21,598
Inventories, net	55,044	58,554
Service and sales demonstration inventory, net	$ 34,355	$ 33,349