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OPERATING SEGMENTS (Tables) | 12 Months Ended
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Dec. 31, 2017
Operating Segments [Abstract] |
Disclosure of Segment Reporting Information, by Segment | Following the formation of the Puna Operations joint venture (note 3), the Pirquitas property was combined with the Chinchillas project into the Puna Operations operating segment and the segment has been amended accordingly. The following is a summary of the reported amounts of income or loss, and the carrying amounts of assets and liabilities by operating segment:
Year ended and at December 31, 2017 | Marigold mine |  | Seabee Gold Operation |  | Puna Operations (i) |  | Exploration and evaluation properties |  | Other reconciling items (ii) |  | Total |
| $ |  |  | $ |  | $ |  | $ |  | $ |
Revenue | 250,825 |  | 108,334 |  | 89,614 |  | — |  | — |  | 448,773 |
Cost of inventory | (129,176 | ) | (51,683 | ) | (62,139 | ) | — |  | — |  | (242,998 | )
Depletion, depreciation and amortization | (54,983 | ) | (40,375 | ) | (7,058 | ) | — |  | — |  | (102,416 | )
Export duties reversal (note 13) | — |  | — |  | 4,303 |  | — |  | — |  | 4,303 |
Restructuring costs (note 17) | — |  | — |  | (109 | ) | — |  | — |  | (109 | )
Inventory (provision) reversal (note 7) | — |  | (632 | ) | 6,342 |  | — |  | — |  | 5,710 |
Cost of sales | (184,159 | ) | (92,690 | ) | (58,661 | ) | — |  | — |  | (335,510 | )
Income from mine operations | 66,666 |  | 15,644 |  | 30,953 |  | — |  | — |  | 113,263 |
Exploration, evaluation and reclamation expenses | (1,875 | ) | (5,050 | ) | (324 | ) | (8,357 | ) | (375 | ) | (15,981 | )
Impairment reversal (note 9) | — |  | — |  | 24,357 |  | — |  | — |  | 24,357 |
Operating income (loss) | 64,935 |  | 10,594 |  | 52,788 |  | (8,360 | ) | (18,625 | ) | 101,332 |
Income (loss) before income tax | 63,959 |  | 10,126 |  | 46,379 |  | (14,840 | ) | (31,037 | ) | 74,587 |
Total assets | 436,815 |  | 418,210 |  | 200,590 |  | 72,825 |  | 409,014 |  | 1,537,454 |
Non-current assets | 222,800 |  | 346,647 |  | 77,112 |  | 71,782 |  | 798 |  | 719,139 |
Total liabilities | (73,526 | ) | (92,050 | ) | (77,850 | ) | (6,496 | ) | (263,604 | ) | (513,526 | )
21. | OPERATING SEGMENTS (Continued)
Year ended and at December 31, 2016 | Marigold mine |  | Seabee Gold Operation |  | Puna Operations |  | Exploration and evaluation properties |  | Other reconciling items (ii) |  | Total |
| $ |  |  | $ |  | $ |  | $ |  | $ |
Revenue | 256,817 |  | 64,826 |  | 169,343 |  | — |  | — |  | 490,986 |
Cost of inventory | (131,821 | ) | (40,178 | ) | (78,507 | ) | — |  | — |  | (250,506 | )
Depletion, depreciation and amortization | (44,324 | ) | (16,442 | ) | (14,803 | ) | — |  | — |  | (75,569 | )
Export duties | — |  | — |  | (1,512 | ) | — |  | — |  | (1,512 | )
Write-down of stockpiles | — |  | — |  | (3,701 | ) | — |  | — |  | (3,701 | )
Restructuring costs | — |  | — |  | (5,692 | ) | — |  | — |  | (5,692 | )
Cost of sales | (176,145 | ) | (56,620 | ) | (104,215 | ) | — |  | — |  | (336,980 | )
Income from mine operations | 80,672 |  | 8,206 |  | 65,128 |  | — |  | — |  | 154,006 |
Exploration, evaluation and reclamation expenses | (1,339 | ) | (1,040 | ) | 1,817 |  | (13,649 | ) | (342 | ) | (14,553 | )
Operating income (loss) | 79,384 |  | 6,763 |  | 65,768 |  | (13,708 | ) | (25,602 | ) | 112,605 |
Income (loss) before income tax | 73,705 |  | 7,302 |  | 52,104 |  | (19,295 | ) | (32,831 | ) | 80,985 |
Total assets | 394,963 |  | 420,796 |  | 94,876 |  | 84,184 |  | 443,869 |  | 1,438,688 |
Non-current assets | 253,373 |  | 370,141 |  | 26,007 |  | 71,441 |  | 994 |  | 721,956 |
Total liabilities | (75,101 | ) | (91,627 | ) | (117,091 | ) | (7,146 | ) | (245,844 | ) | (536,809 | )
(1) | We consolidate Puna Operations which includes non-controlling interest portion of revenues, and income from mine operations for the year ended December 31, 2017 of $12,361,000 and $4,039,000, respectively, (2016: $nil and $nil)
(2) | Other reconciling items refer to items that are not reported as part of segment performance as they are managed on a corporate basis.
Disclosure of Revenue by Product | Revenue by product Our Marigold mine and Seabee Gold Operation produce gold in doré form. This is unrefined gold bullion bars usually consisting of in excess of 90% gold that is refined to pure gold bullion prior to sale to our customers, which are typically bullion banks. Puna Operations produces silver concentrate, which is sold to smelters or traders for further refining. During 2017, one concentrate customer accounted for 7% (2016 - 15%) of our total revenue.
Years ended December 31 | 2017 | 2016
| % | %
Gold | 80 | 65
Silver | 20 | 35
Disclosure of Long-lived Assets by Geographic Areas | Non-current assets by location
| December 31, 2017 |  | December 31, 2016 |
| $ |  | $ |
Canada | 348,455 |  | 372,389 |
United States | 224,612 |  | 256,184 |
Argentina | 79,250 |  | 26,008 |
Mexico | 66,131 |  | 66,561 |
Other | 691 |  | 814 |
Total | 719,139 |  | 721,956 |

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