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Financial Assets and Financial Liabilities - Summary of Other Financial Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Financial assets at fair value through other comprehensive income    
Financial assets at fair value through other comprehensive income $ 2,271 $ 4,062
Other financial assets $ 2,271 4,062
Financial liabilities at fair value through profit or loss    
Foreign exchange forward contracts   3
Other financial liabilities   $ 3