Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventories

Schedule of inventories

	As of June 30,		As of December 31,
(in thousands)	2019		2018
Raw materials	$	20,574	$	19,632
Work in process		13,136		9,278
Finished goods		37,400		38,780
Total inventories	$	71,110	$	67,690