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OPERATING COSTS BY NATURE (Tables) | 12 Months Ended
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Dec. 31, 2018
Analysis of income and expense [abstract] |
Disclosure of cost of sales | Cost of sales
Years ended December 31 | 2018 |  | 2017 |
| $ |  | $ |
Cost of inventory | 245,111 |  | 242,998 |
Depletion, depreciation and amortization | 98,719 |  | 102,416 |
Moratorium (settlement) (note 13) | — |  | (4,303 | )
(Recovery) of inventory provision (note 7) | — |  | (5,710 | )
Restructuring costs | — |  | 109 |
| 343,830 |  | 335,510 |
Disclosure of general and administrative expense | General and administrative expenses
Years ended December 31 | 2018 |  | 2017 |
| $ |  | $ |
Salaries and benefits | 12,157 |  | 9,029 |
Share-based compensation | 13,371 |  | 4,225 |
Consulting and professional fees | 3,036 |  | 2,288 |
Travel expense | 1,044 |  | 562 |
Rent expense | 842 |  | 703 |
Insurance expense | 676 |  | 569 |
Computer expenses | 668 |  | 789 |
Depreciation and amortization | 194 |  | 202 |
Shareholder and investor relations | 99 |  | 323 |
Listing and filing fees | 249 |  | 251 |
Directors fees and expenses | 347 |  | 227 |
Other expenses | 258 |  | 1,139 |
| 32,941 |  | 20,307 |

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