INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2018

INVENTORIES

Schedule of inventories

	As of December 31,
(in thousands)	2018		2017
Raw materials	$	19,632	$	19,929
Work in process		9,278		8,996
Finished goods		38,780		40,213
Total inventories	$	67,690	$	69,138