Inventory (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventory

Inventory consisted of the following at March 31, 2019 and December 31, 2018 (in thousands):

	March 31,		December 31,
	2019		2018
Finished goods	$	602	$	347
Work-in-process		6,088		6,375
Raw materials and supplies		59,181		58,857
Inventory	$	65,871	$	65,579