Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories at December 31, 2017 and December 31, 2016, consisted of the following:

(in thousands)	December 31, 2017		December 31, 2016
Raw material	$	2,148	$	1,649
Work-in-process	6,585		7,963
Finished goods	14,647		5,132
Supplies	729		723
Total inventories	$	24,109	$	15,467