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Segment disclosures (Tables)
 12 Months Ended
Dec. 31, 2017
Segment disclosures [Abstract]  
Disclosure of segment geographic information
The following geographic information reflects revenue based on customer location.

2017
$

 
2016
$

Revenue

 

United States
300

 
—

China
118

 
118

Switzerland
2

 
—

Canada
—

 
55


420

 
173