Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories by Type

Inventories consisted of the following:

	As of March 31, 2019		As of December 31, 2018
	(in thousands)
Raw materials	$	11,649	$	9,677
Work-in-process	80,529		87,944
Finished goods	44,520		26,739
Total	$	136,698	$	124,360