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Property, plant and equipment | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [abstract] |
Property, plant and equipment | 8. Property, plant and equipment
|  | Mining |  |  | Non-producing |  |  | Plant and |  |  | Corporate office |  |  |  |
|  | interests |  |  | properties |  |  | equipment |  |  | equipment |  |  | Total |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2016 |  | $ | 63,954 |  |  | $ | 75,746 |  |  | $ | 38,196 |  |  | $ | 161 |  |  | $ | 178,057 |
Assets additions |  |  | 4,569 |  |  |  | 1,583 |  |  |  | 1,817 |  |  |  | 3 |  |  |  | 7,972 |
Change in decommissioning provision |  |  | (952 | ) |  |  | 61 |  |  |  | - |  |  |  | - |  |  |  | (891 | )
Disposals |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (83 | ) |  |  | (83 | )
Balance at December 31, 2016 |  |  | 67,571 |  |  |  | 77,390 |  |  |  | 40,013 |  |  |  | 81 |  |  |  | 185,055 |
Assets 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 |
Accumulated depreciation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
and depletion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2016 |  | $ | 28,298 |  |  | $ | 50,502 |  |  | $ | 18,305 |  |  | $ | 77 |  |  | $ | 97,182 |
Depreciation/depletion for the year |  |  | 3,112 |  |  |  | - |  |  |  | 4,261 |  |  |  | 15 |  |  |  | 7,388 |
Disposals |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (63 | ) |  |  | (63 | )
Balance at December 31, 2016 |  |  | 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 |
Carrying value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
at December 31, 2016 |  | $ | 36,161 |  |  | $ | 26,888 |  |  | $ | 17,447 |  |  | $ | 52 |  |  | $ | 80,548 |
at December 31, 2017 |  | $ | 69,514 |  |  | $ | 7,965 |  |  | $ | 22,777 |  |  | $ | 45 |  |  | $ | 100,301 |
On March 2, 2017, the Company entered into an option acquisition agreement with Impulsora Minera Santacruz S.A. de C.V., a wholly-owned subsidiary of Santacruz Silver Mining Ltd. (“Santacruz”), to acquire an existing option with Minera Hochschild Mexico S.A. de C.V. (“Hochschild”) for the right to acquire a 100% interest of the San Felipe property located in Sonora, Mexico for total consideration of $15 million in cash, payable in two installments. The purchase of the option of $5 million to Santacruz plus an initial option payment of $2 million to Hochschild, plus applicable VAT, was paid with cash on hand by the Company in March while the final option payment of $8 million, plus applicable VAT, was payable to Hochschild on or before December 15, 2017. On December 1, 2017, the final option payment of $8 million plus applicable VAT was amended to become option payments of $0.5 million payable on January 1, 2018, $0.5 million payable on April 1, 2018, $1.0 million payable on July 1, 2018, with the remaining balance of $6.0 million payable on or before December 31, 2018. Effective December 19, 2017, the San Rafael mine declared commercial production which the Company defined as operating at an average of 80% designed production capacity with saleable concentrate recoveries within 5% of its mining feasibility study over a two week period. The Company transferred $31.6 million in net book value from non-producing properties to mining interests, net of pre-commercial production revenue of $4.0 million and historical carrying value of $25.2 million. Non-current assets are tested for impairment or impairment reversals when events or changes in circumstances suggest that the carrying amount may not be recoverable. A write-down of $0.2 million related to the U.S. operations was recorded for the year ended December 31, 2017 as a result of writing down carrying amounts of equipment to recoverable amounts. No other impairment or impairment reversal indicators were identified for the year ended December 31, 2017. The amount of borrowing costs capitalized as property, plant and equipment was $0.7 million during the year ended December 31, 2017 (2016: nil).

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- Definition The entire disclosure for property, plant and equipment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2017-03-09 + Details
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