Inventories (Tables)

9 Months Ended

Sep. 30, 2019

Inventories

Schedule of inventories

	As of September 30,		As of December 31,
(in thousands)	2019		2018
Raw materials	$	20,908	$	19,632
Work in process		14,287		9,278
Finished goods		40,498		38,780
Total inventories	$	75,693	$	67,690