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Income taxes (Tables) | 9 Months Ended
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Sep. 30, 2018
Income Taxes [abstract] |
Schedule of Components of Deferred Tax Liabilities | The Company’s net deferred tax liability relates to the Mexican mining royalty and arises principally from the following:
|  | September 30, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Property, plant and equipment |  | $ | 837 |  |  | $ | 900 |
Other |  |  | 25 |  |  |  | - |
Total deferred tax liabilities |  |  | 862 |  |  |  | 900 |
Alternative minimum tax credits |  |  | 626 |  |  |  | 626 |
Other |  |  | - |  |  |  | 28 |
Total deferred tax assets |  |  | 626 |  |  |  | 654 |
Net deferred tax liabilities |  | $ | 236 |  |  | $ | 246 |

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- Definition The disclosure of types of temporary differences, unused tax losses and unused tax credits. [Refer: Unused tax credits [member]; Unused tax losses [member]; Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_g&doctype=Standard -URIDate 2018-03-16 + Details
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