Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of major classes of inventories

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

	March 31, 2018		December 31, 2017
Raw materials	$	12,578	$	12,418
Work in process	5,417		4,146
Finished goods	13,603		20,792
Total inventories	$	31,598	$	37,356