Inventory (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of inventory

Inventory consisted of the following:

(in thousands)	September 30, 2018		December 31, 2017
Raw materials	$	11,896	$	10,447
Work in process	7,168		5,509
Finished goods	15,508		10,124
Total inventory	$	34,572	$	26,080