INVENTORY (Tables)

3 Months Ended

Mar. 31, 2019

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, 2019		As of December 31, 2018
	(in thousands)
Raw materials	$	70,271	$	71,313
Work in progress		66,884		47,279
Finished goods		3,312		6,853
Total inventory	$	140,467	$	125,445