Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Components of Inventory

Inventories consist of the following (in thousands):

	March 31, 2018		December 31, 2017
Raw materials	$	772	$	572
Work-in-process		2,519		1,273
Finished goods		600		812
Total inventory	$	3,891	$	2,657