Inventory

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Inventory

8. Inventory

Inventories are stated at the lower of cost or net realizable value on a first-in, first-out basis and are comprised of the following (in thousands):

	March 31, 2018		December 31, 2017
Raw materials	$	11,655	$	8,963
Work-in-process		4,756		4,208
	$	16,411	$	13,171