Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories are comprised of the following (in thousands):

	March 31, 2018		December 31, 2017
Raw materials	$	1,668	$	1,526
Work in process		1,585		1,337
Finished goods		755		1,012
Total Inventories, net	$	4,008	$	3,875