Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories

	December 31,
	2018		2017
	(in thousands)
Raw materials	$	1,719	$	1,526
Work in process		1,807		1,337
Finished goods		940		1,012
Total Inventories, net	$	4,466	$	3,875