Inventory

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventory

5. Inventory

Inventory consisted of the following at June 30, 2019 and December 31, 2018 (in thousands):

	June 30, 2019		December 31, 2018
Finished goods	$	7	$	347
Work-in-process		8,194		6,375
Raw materials and supplies		60,410		58,857
Inventory	$	68,611	$	65,579