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Other income
 3 Months Ended
Mar. 31, 2017
Other Income and Expenses [Abstract]  
Other income

6. Other income

 

     THREE MONTHS ENDED
MARCH 31,		  
     2017      2016  

Change in fair value of derivative liability

    $ —        $ 50  

Foreign exchange losses

      (8 )       (26 ) 

Interest income

      234        121  

Miscellaneous expenses

      (20 )       (22 ) 
  

 

 

     

 

 

  
   $ 206      $ 123