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Inventories (Tables)
 9 Months Ended
Sep. 30, 2017
Inventory, Net [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist primarily of production from the Company’s operation, in varying stages of the production process and supplies and spare parts, all of which are presented at the lower of cost or net realizable value. Inventories of the Company are comprised of:
 
 
 
September 30,
2017
 
December 31, 2016
 
Stockpile inventory
 
$
50
 
$
318
 
In-process inventory
 
 
9,425
 
 
9,491
 
Dore inventory
 
 
414
 
 
76
 
Supplies and spare parts
 
 
2,063
 
 
1,056
 
 
 
$
11,952
 
$
10,941