Inventories (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Schedule of Inventories by Type

Inventories consisted of the following:

	As of March 31, 2015		As of December 31, 2014
	(in thousands)
Raw materials	$	7,833	$	8,506
Work-in-process	22,564		20,508
Finished goods	3,692		1,834
Total	$	34,089	$	30,848