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Financial Assets at Fair Value Through Profit or Loss (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Financial Assets at Fair Value Through Profit or Loss    
Equity securities-unlisted company $ 13,500 $ 9,768
Financial assets at fair value through profit or loss 13,500 9,768
Non-current $ 13,500 $ 9,768