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Property, plant and equipment (Tables) | 9 Months Ended
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Sep. 30, 2018
Disclosure of detailed information about property, plant and equipment [abstract] |
Schedule of Property, Plant and Equipment |
|  | Mining |  |  | Non-producing |  |  | Plant and |  |  | Corporate office |  |  |  |
|  | interests |  |  | properties |  |  | equipment |  |  | equipment |  |  | Total |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2017 |  | $ | 67,571 |  |  | $ | 77,390 |  |  | $ | 40,013 |  |  | $ | 81 |  |  | $ | 185,055 |
Asset additions |  |  | 5,233 |  |  |  | 5,526 |  |  |  | 8,795 |  |  |  | 3 |  |  |  | 19,557 |
Property purchase option acquired |  |  | - |  |  |  | 7,108 |  |  |  | - |  |  |  | - |  |  |  | 7,108 |
Change in decommissioning provision |  |  | (37 | ) |  |  | 38 |  |  |  | - |  |  |  | - |  |  |  | 1 |
Reclassification |  |  | 31,595 |  |  |  | (31,595 | ) |  |  | - |  |  |  | - |  |  |  | - |
Balance at December 31, 2017 |  |  | 104,362 |  |  |  | 58,467 |  |  |  | 48,808 |  |  |  | 84 |  |  |  | 211,721 |
Asset additions |  |  | 6,489 |  |  |  | - |  |  |  | 4,467 |  |  |  | 10 |  |  |  | 10,966 |
Property purchase option acquired |  |  | - |  |  |  | 2,000 |  |  |  | - |  |  |  | - |  |  |  | 2,000 |
Change in decommissioning provision |  |  | (110 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (110 | )
Balance at September 30, 2018 |  | $ | 110,741 |  |  | $ | 60,467 |  |  | $ | 53,275 |  |  | $ | 94 |  |  | $ | 224,577 |
Accumulated depreciation and depletion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2017 |  | $ | 31,410 |  |  | $ | 50,502 |  |  | $ | 22,566 |  |  | $ | 29 |  |  | $ | 104,507 |
Depreciation/depletion for the year |  |  | 3,438 |  |  |  | - |  |  |  | 3,261 |  |  |  | 10 |  |  |  | 6,709 |
Write-down of equipment |  |  | - |  |  |  | - |  |  |  | 204 |  |  |  | - |  |  |  | 204 |
Balance at December 31, 2017 |  |  | 34,848 |  |  |  | 50,502 |  |  |  | 26,031 |  |  |  | 39 |  |  |  | 111,420 |
Depreciation/depletion for the period |  |  | 4,439 |  |  |  | - |  |  |  | 2,599 |  |  |  | 6 |  |  |  | 7,044 |
Write-down of equipment |  |  | - |  |  |  | - |  |  |  | 65 |  |  |  | - |  |  |  | 65 |
Balance at September 30, 2018 |  | $ | 39,287 |  |  | $ | 50,502 |  |  | $ | 28,695 |  |  | $ | 45 |  |  | $ | 118,529 |
Carrying value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
at December 31, 2017 |  | $ | 69,514 |  |  | $ | 7,965 |  |  | $ | 22,777 |  |  | $ | 45 |  |  | $ | 100,301 |
at September 30, 2018 |  | $ | 71,454 |  |  | $ | 9,965 |  |  | $ | 24,580 |  |  | $ | 49 |  |  | $ | 106,048 |

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- Definition The disclosure of detailed information about property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2018-01-01 -Paragraph 73 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73&doctype=Standard -URIDate 2018-03-16 + Details
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