Inventory (Tables)

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Schedule of inventory

Inventory consisted of the following:

(in thousands)	September 30, 2019		December 31, 2018
Raw materials	$	12,168	$	11,100
Work in process	8,658		4,261
Finished goods	9,770		17,658
Total inventory	$	30,596	$	33,019