Inventory (Tables)

9 Months Ended

Sep. 30, 2016

Inventory [Abstract]

Schedule of Inventory, Current [Table Text Block]

	September 30, 2016		December 31, 2015
Finished goods	$	67,749	$	71,951
Raw materials		16,745		23,418
Work-in-process		4,194		18,203
Supplies and consumables		35,224		35,189
Total	$	123,912	$	148,761