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MINERAL PROPERTY INTERESTS AND PLANT AND EQUIPMENT (Tables) | 6 Months Ended
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Jun. 30, 2019
MINERAL PROPERTY INTERESTS, PLANT AND EQUIPMENT AND CONSTRUCTION IN PROGRESS |
Schedule of property and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2019 |  | December 31, 2018 |
Mineral property interests |  | $ | 340,945 |  | $ | 326,086 | ​
Land | ​ |  | 8,708 | ​ |  | 8,699 | ​
Construction in progress | ​ | ​ | 3,901 | ​ | ​ | 74,643 | ​
Plant and equipment | ​ | ​ | 130,572 | ​ | ​ | 49,578 | ​
Subtotal | ​ | $ | 484,126 | ​ | $ | 459,006 | ​
Less: accumulated depreciation | ​ |  | (48,006) | ​ | ​ | (35,127) | ​
Net carrying value | ​ | $ | 436,120 | ​ | $ | 423,879 | ​
Schedule of leased assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, 2019 | ​
​ | ​ | Operating lease | ​ | Finance leases | ​
Leased assets, cost | ​ | $ | 1,167 | ​ | $ | 8,048 | ​
Accumulated amortization | ​ | ​ | (413) | ​ | ​ | (515) | ​
Net book value | ​ | $ | 754 | ​ | $ | 7,533 | ​
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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