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OTHER (EXPENSES) INCOME (Tables)
 12 Months Ended
Dec. 31, 2017
Analysis of income and expense [abstract]  
Other income (expenses)
Years ended December 31
2017

2016

 
$

$

Loss on disposal of plant and equipment
(3,068
)
(4,018
)
Write-down of held for sale asset
—

(2,466
)
Write-down of mineral properties
(906
)
—

Royalty income
1,417

604

Other
(510
)
70

 
(3,067
)
(5,810
)