Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories were as follows (in thousands):

	June 30, 2018		December 31, 2017
Raw materials	$	32,854	$	27,400
Work-in-process		3,513		3,596
Finished goods		5,386		5,503
Net balance	$	41,753	$	36,499