INVENTORY (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Summary of Components of Inventory

The following table summarizes the components of the Company’s inventory for the period indicated:

	As of June 30, 2018		As of December 31, 2017
	(in thousands)
Raw materials	$	64,525	$	53,875
Work in progress		37,107		27,442
Finished goods		2,494		2,288
Total inventory	$	104,126	$	83,605