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Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

Intangible assets were as follows:

 

     Estimated weighted
average useful
life in years
     2017      2016  

Cost

        

Customer relationship intangibles [note 6]

     10      $ 438      $ 392  

Computer software

     3        348        316  

Patent and licenses

     13        342        278  
     

 

 

    

 

 

 
        1,128        986  

Accumulated depreciation

        

Customer relationship intangibles [note 6]

        (162      (96

Computer software

        (263      (242

Patent and licenses

        (53      (27
     

 

 

    

 

 

 
      $ 650      $ 621