Inventories

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories

3.    Inventories

Inventories consisted of the following:

	December 31, 2017		December 31, 2016
Raw materials	$	49,351	$	45,507
Work in process		22,914		20,128
Finished goods		73,346		74,205
	$	145,611	$	139,840