Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories consist of the following: 

	As of March 31, 2019		As of December 31, 2018
Raw materials	$	43,406	$	39,859
Finished goods	31,180		25,585
Inventories, net	$	74,586	$	65,444
Service and sales demonstration inventory, net	$	38,351	$	39,563