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INVENTORIES (Tables) | 12 Months Ended
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Dec. 31, 2020
Inventory Disclosure [Abstract] |
Schedule of Inventory, Current |
| December 31, 2020 |  | December 31, 2019
Concentrates and work-in-progress (1) | $ | 25,768 |  |  | $ | 20,893 |
Inventory of ore in stockpiles | 241 |  |  | 241 |
Raw materials and consumables | 2,912 |  |  | 2,823 |
| $ | 28,921 |  |  | $ | 23,957 |
Inventories - by duration |  |  |
Current | $ | 27,575 |  |  | $ | 22,808 |
Long term - raw materials and consumables | $ | 1,346 |  |  | $ | 1,149 |
| $ | 28,921 |  |  | $ | 23,957 |
(1)For the year ended December 31, 2020, the Company recorded an impairment loss of $1.64 million in the Consolidated Statement of Operations related to concentrates and work in progress inventories (December 31, 2019 - $14.35 million).

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