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Other (Expense) Income (Tables)
12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
Summary of Other Income
 
Year Ended December 31,
 
2019
$
 
2018
$
 
2017
$
Foreign exchange gain
486

 
3,133

 
79

Other income
209

 
49

 
250

Total
695


3,182


329