XML 99 R68.htm IDEA: XBRL DOCUMENT v3.19.1
Financial Instruments - Financial Assets Recorded at FVTPL (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial assets [line items]    
Unrealized net losses on short-term investments, equity securities $ (2,481) $ (910)
Realized net losses on short-term investments, equity securities 2,449 (304)
Gains (losses) on financial assets at fair value through profit or loss 4,930 606
Equity securities [member]    
Disclosure of financial assets [line items]    
Unrealized net losses on short-term investments, equity securities 3,298 0
Realized net losses on short-term investments, equity securities (49) 0
Gains (losses) on financial assets at fair value through profit or loss $ (3,347) $ 0