Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Summary of determination cost of inventories

Inventories consist of the following:

	June 30,		December 31,
	2018		2017
Finished and in-process products	$	32,765	$	31,307
Raw materials and supplies		16,597		15,859
	$	49,362	$	47,166