Registration statement for securities of certain foreign private issuers

Financial Instruments (Details)

v3.19.3.a.u2
Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Long-term investment [Member]    
Statement Line Items [Line Items]    
Financial assets at fair value through profit or loss (classified as Level 2 in the fair value hierarchy) $ 917
Short-term investment [Member]    
Statement Line Items [Line Items]    
Financial assets at fair value through profit or loss (classified as Level 2 in the fair value hierarchy) $ 273