Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Schedule of major classes of inventories

Our major classes of inventories were as follows as of December 31, 2018 and 2017 (in thousands):

	December 31,
	2018		2017
Raw materials	$	9,388	$	9,505
Work in process	5,932		4,146
Finished goods	11,371		20,792
Total inventories	$	26,691	$	34,443