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Income taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Taxes [abstract] |
Schedule of Components of Income Tax Expense (Recovery) | The components of income tax expense (recovery) are as follows:
|  | Year ended |  |  | Year ended |
|  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Current income tax expense |  | $ | 161 |  |  | $ | - |
Deferred income tax expense (recovery) |  |  | (588 | ) |  |  | 210 |
Income tax expense (recovery) |  | $ | (427 | ) |  | $ | 210 |
Schedule of Reconciliation of Effective Tax Rate | The Company’s effective rate of income tax differs from the statutory rate of 26.5% as follows:
|  | Year ended |  |  | Year ended |
|  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Tax recovery at statutory rates |  | $ | (1,032 | ) |  | $ | (1,330 | )
Mexican mining royalty |  |  | 199 |  |  |  | 210 |
Impact of foreign tax rates |  |  | 18 |  |  |  | 215 |
Non-deductible expenses |  |  | 535 |  |  |  | 1,477 |
Alternative minimum tax credits |  |  | (626 | ) |  |  | - |
Losses not recognized (recognized) |  |  | 479 |  |  |  | (362 | )
Income tax expense (recovery) |  | $ | (427 | ) |  | $ | 210 |
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:
|  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Property, plant and equipment |  | $ | 900 |  |  | $ | 972 |
Total deferred tax liabilities |  |  | 900 |  |  |  | 972 |
Alternative minimum tax credits |  |  | 626 |  |  |  | - |
Other |  |  | 28 |  |  |  | 138 |
Total deferred tax assets |  |  | 654 |  |  |  | 138 |
Net deferred tax liabilities |  | $ | 246 |  |  | $ | 834 |
Schedule of Components of Deferred Income Taxes not Recognized in Repect to Deductible Temporary Differences | Deferred income taxes have not been recognized in respect of the following deductible temporary differences, as management does not consider their utilization to be probable if the foreseeable future:
|  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Property, plant and equipment |  | $ | 4,890 |  |  | $ | 3,272 |
Mexican tax losses (expiring in 2018 - 2027) |  |  | 42,843 |  |  |  | 52,702 |
Canadian tax losses (expiring in 2029 - 2037) |  |  | 35,173 |  |  |  | 30,268 |
U.S. tax losses (expiring in 2020 - 2037) |  |  | 32,070 |  |  |  | 29,764 |
Provisions and other |  |  | 24,956 |  |  |  | 24,718 |
Deferred Mexican mining royalty |  |  | 872 |  |  |  | 834 |
|  | $ | 140,804 |  |  | $ | 141,558 |

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