Inventory (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventory

Inventory consisted of the following at September 30, 2018 and December 31, 2017 (in thousands):

	September 30,		December 31,
	2018		2017
Finished goods	$	1,511	$	2,270
Work-in-process		4,955		529
Raw materials and supplies		62,946		66,368
Inventory	$	69,412	$	69,167