Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories at September 30, 2017 and December 31, 2016 consisted of the following:

(in thousands)	September 30, 2017		December 31, 2016
Raw material	$	1,143	$	1,649
Work-in-process	6,323		7,963
Finished goods	8,694		5,132
Supplies	792		723
Total inventories	$	16,952	$	15,467