Inventory (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Inventory

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

	2019		2018
Finished goods	$	105	$	347
Work-in-process		1,229		6,375
Raw materials and supplies		35,023		58,857
Inventory	$	36,357	$	65,579