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INVENTORIES
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventories
INVENTORIES
 
June 30, 2020
 
December 31, 2019
 Concentrates and work-in-progress(1)
$
24,771

 
$
20,893

 Inventory of ore in stockpiles
241

 
241

 Raw materials and consumables
2,713

 
2,823

 
$
27,725

 
$
23,957

Inventories - by duration


 


   Current
$
26,576

 
$
22,808

   Long term - raw materials and consumables
1,149

 
1,149


$
27,725

 
$
23,957

(1) For the three and six months ended June 30, 2020, the Company recorded an impairment loss of $0.43 million and $1.51 million in the statement of operations related to concentrates and work in progress inventories (June 30, 2019 - $4.91 million and $6.08 million).