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Debt - Summary of Debt (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2018
Long-term debt:      
Opening balance $ 38,640 $ 45,534  
IFRS adjustment for deferred financing fees 260    
Proceeds from long-term debt   306  
Repayment of debt (2,738) (7,320)  
Foreign currency translation (43) 120  
Closing balance 35,859 38,640  
Current portion 3,414 2,620  
Non-current portion 32,445 35,760 $ 36,020
Less: Unamortized deferred transaction costs   (260)  
Total long-term debt $ 35,859 $ 38,380