Inventories

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventory on hand as of December 31, 2018 and 2017 comprised the following (in thousands):

	December 31,
	2018		2017
Raw materials	$	2,449	$	4,534
Work-in-process	3,349		3,638
Finished goods	4,446		2,777
Total inventory	$	10,244	$	10,949