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v3.19.1

Inventory, net (Details 1) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) lb | Dec. 31, 2017 USD ($) lb
Disclosure of inventory net [Line Items] |  |
Mineral deposits inventory gross | $ 37,803 | $ 19,435
Impairment of mineral deposits | (1,467) | (1,467)
Mineral deposits invenory, net | 36,336 | 17,968
Mineral deposits inventory, current | 33,383 | 14,730
Mineral deposits inventory, noncurrent | $ 2,953 | $ 3,238
Inventory units in dry metric tonne | lb | 2,160,419 | 1,329,469
Mineral in stock piles [Member] |  |
Disclosure of inventory net [Line Items] |  |
Mineral deposits inventory gross | $ 5,297 | $ 7,173
Inventory units in dry metric tonne | lb | 342,411 | 463,746
Fresh mineral in plant [Member] |  |
Disclosure of inventory net [Line Items] |  |
Mineral deposits inventory gross | $ 32,506 | $ 11,983
Inventory units in dry metric tonne | lb | 1,818,008 | 835,613
Tail Mineral [Member] |  |
Disclosure of inventory net [Line Items] |  |
Mineral deposits inventory gross | $ 0 | $ 279
Inventory units in dry metric tonne | lb | 0 | 30,110

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