Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consist of the following:

	September 30,		December 31,
(in thousands)	2018		2017
Raw materials	$	389	$	298
Work-in-process		454		721
Finished goods		111		229
Total inventories	$	954	$	1,248