Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Summary of determination cost of inventories

Inventories consist of the following:

	March 31,		December 31,
	2018		2017
Finished and in-process products	$	32,200	$	31,307
Raw materials and supplies		15,640		15,859
	$	47,840	$	47,166