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CASH AND CASH EQUIVALENTS
12 Months Ended
Dec. 31, 2017
Cash and cash equivalents [abstract]  
CASH AND CASH EQUIVALENTS
CASH AND CASH EQUIVALENTS
       
 
December 31, 2017

December 31, 2016

 
$

$

Cash
131,589

181,421

Short-term investments
328,275

145,706

 
459,864

327,127