INVENTORIES, NET (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 17,752	$ 18,465
Work in process	3,942	4,296
Finished goods	10,166	11,465
Allowance for excess or obsolete inventory	(1,559)	(1,630)
Total inventory, net	$ 30,301	$ 32,596