INVENTORY (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2018		As of December 31, 2017
	(in thousands)
Raw materials	$	63,494	$	53,875
Work in progress		34,609		27,442
Finished goods		1,272		2,288
Total inventory	$	99,375	$	83,605