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New Standards And Interpretations - Schedule of Significant Effects of Adopting IFRS 16 (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Assets      
Prepayments   $ 1,081 $ 1,140
Lease assets   0 66
Right-of-use assets $ 3,735 3,801 0
Prepaid land lease payments   0 978
Total affected assets   4,882 2,184
Liabilities      
Financial lease liabilities - current   406 44
Financial lease liabilities - non-current   2,382 46
Total affected liabilities   2,788 $ 90
Effect of Adoption of New Standards [Member]      
Assets      
Prepayments   (59)  
Lease assets   (66)  
Right-of-use assets   3,801  
Prepaid land lease payments   (978)  
Total affected assets   2,698  
Liabilities      
Financial lease liabilities - current   362  
Financial lease liabilities - non-current   2,336  
Total affected liabilities   $ 2,698