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Inventory (Tables)
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Noncurrent [Table Text Block]
 
 
December 31,
 
 
 
2017
 
2016
 
Water stock
 
$
28,332
 
$
23,905
 
Consumables stock
 
 
150,534
 
 
143,028
 
Spare parts stock
 
 
6,324,552
 
 
6,745,034
 
Total inventory
 
 
6,503,418
 
 
6,911,967
 
Less current portion
 
 
1,744,445
 
 
2,305,879
 
Inventory (non-current)
 
$
4,758,973
 
$
4,606,088