Inventory (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Components of Inventory

The components of inventory are as follows:

	March 31,		December 31,
(in thousands)	2018		2017
Raw materials	$	11,779	$	11,326
Work in process and semi-finished goods	13,549		6,039
Finished goods	10,023		12,205
	$	35,351	$	29,570