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Financial Risk Management Objectives - Summary of Maturity Profile of Financial Liabilities Based on Contractual Undiscounted Payment Obligations (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Interest-bearing loans and borrowings $ 11,484 $ 25,151
Trade and other payables 16,879 21,127
Foreign exchange forward contracts 3 142
Lease liability 3,192 94
Financial liabilities 34,842 49,511
Within one year [Member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Interest-bearing loans and borrowings 11,484 25,151
Trade and other payables 16,879 21,127
Foreign exchange forward contracts 3 142
Lease liability 656 47
Financial liabilities 32,306 49,464
2 to 3 years [Member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Lease liability 910 36
Financial liabilities 910 36
4 to 5 years [Member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Lease liability 444 11
Financial liabilities 444 11
More than five years [Member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Lease liability 1,182  
Financial liabilities 1,182  
All other related parties [Member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Due to related parties 3,284 2,997
All other related parties [Member] | Within one year [Member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Due to related parties $ 3,284 $ 2,997