Inventory (Tables)

3 Months Ended

Mar. 31, 2017

Inventory [Abstract]

Schedule of Inventory, Current [Table Text Block]

	March 31, 2017		December 31, 2016
Finished goods	$	61,724	$	49,888
Raw materials		13,443		17,948
Work-in-process		7,445		5,214
Supplies and consumables		29,450		30,029
Total	$	112,062	$	103,079