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MARKETABLE SECURITIES (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure Of Detailed Information About Marketable Securities [Abstract]  
Disclosure of the movement in marketable securities
 
December 31, 2018

December 31, 2017

 
$

$

Balance, beginning of year
114,001

148,944

Additions
22,674

5,295

Disposals
(63,445
)
(72,132
)
Fair value adjustments
(43,688
)
31,894

Balance, end of year
29,542

114,001