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Financial Assets and Financial Liabilities - Summary of Other Financial Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2018
Financial assets at fair value through other comprehensive income      
Financial assets at fair value through other comprehensive income $ 4,062 $ 2,332 $ 2,747
Other financial assets 4,062 2,332  
Financial liabilities at fair value through profit or loss      
Foreign exchange forward contracts 3 142  
Other financial liabilities $ 3 $ 142