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Inventories | 9 Months Ended
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Sep. 30, 2018
Classes of current inventories [abstract] |
Inventories | 6. Inventories
|  | September 30, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Concentrates |  | $ | 1,230 |  |  | $ | 1,391 |
Ore stockpiles |  |  | 1,436 |  |  |  | 2,877 |
Spare parts and supplies |  |  | 5,584 |  |  |  | 5,098 |
|  | $ | 8,250 |  |  | $ | 9,366 |
The amount of inventories recognized as an expense was $12.8 million during the three-month period ended September 30, 2018 (2017: $7.7 million) and $37.9 million during the nine-month period ended September 30, 2018 (2017: $30.4 million). The concentrates and ore stockpiles, and spare parts and supplies write-down (recovery) to net realizable value included in cost of sales were $0.5 million and ($0.2) million, respectively, during the three-month period ended September 30, 2018 (2017: nil and $0.2 million, respectively) and $0.5 million and ($0.2) million, respectively, during the nine-month period ended September 30, 2018 (2017: $0.1 million and $0.2 million, respectively).

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- Definition The entire disclosure for inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2018-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=2&date=2018-03-01&anchor=sect_Disclosure&doctype=Standard -URIDate 2018-03-16 + Details
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