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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible assets were as follows:
 
   Estimated weighted
average useful
 
life
in years		   
2019
   2018 
Cost
               
Customer relationship intangibles
[note 7]
   9   
$
429
 
  $415 
Computer software
   1   
 
396
 
   291 
Patent and licenses
   11   
 
264
 
   340 
   
 
 
   
 
 
   
 
 
 
        
 
1,089
 
   1,046 
Accumulated depreciation
               
Customer relationship intangibles
[note 7]
       
 
(216
)
 
   (191) 
Computer software
       
 
(310
)
 
   (219) 
Patent and licenses
       
 
(79
)
 
   (76) 
        
 
 
   
 
 
 
        
$
484
 
  $560