Inventory (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of inventory

Inventory consisted of the following at September 30, 2018 and December 31, 2017 (in thousands):

	September 30, 2018		December 31, 2017
Raw materials	$	4,257	$	3,852
Work in process	636		313
Finished goods	653		201
Total inventories	$	5,546	$	4,366