Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following:

	March 31, 2017		December 31, 2016
Raw materials	$	35,225	$	33,185
Finished products	88,178		81,369
Spare parts	13,969		13,741
	$	137,372	$	128,295