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Trade and other receivables
12 Months Ended
Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]  
Trade and other receivables
 
 
December 31, 2018

 
December 31, 2017

Trade accounts receivable
 
$
21,724

 
$
20,439

Other receivables
 
7,706

 
1,637

Contract assets
 
9,094

 
1,004

 
 
$
38,524

 
$
23,080

Trade and other receivables:
 
 
December 31, 2018

 
December 31, 2017

Trade accounts receivable
 
$
21,724

 
$
20,439

Other receivables
 
7,706

 
1,637

Contract assets
 
9,094

 
1,004

 
 
$
38,524

 
$
23,080


Contract assets primarily relate to the Corporation's rights to consideration for work completed but not billed as at December 31, 2018 for engineering services and technology transfer services.
Contract assets
December 31, 2018

At January 1, 2018
$
1,004

Additions to contract assets
9,030

Invoiced during the year
(940
)
At December 31, 2018
$
9,094