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INVENTORIES
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
INVENTORIES
 
June 30, 2019
 
December 31, 2018
 Concentrates and work-in-progress
$
16,725

 
$
14,746

 Inventory of ore in stockpiles
749

 
883

 Raw materials and consumables
2,872

 
2,693

 
$
20,346

 
$
18,322

Inventories - by duration


 


   Current
$
18,574

 
$
16,550

   Long term - raw materials and consumables
1,772

 
1,772


$
20,346

 
$
18,322

(a)
For the three and six months ended June 30, 2019, the Company recorded an impairment loss of $4.91 million and $6.08 million in the statement of operations related to concentrates and work in progress inventories and iventory of ore in stockpiles (June 30, 2018 - $1.34 million and $2.35 million).