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Equity Method Investments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
IFRS Statement [Line Items]    
Carrying amount $ 3,746 $ 4,064
Holding 100.00%  
Ganzin Technology Corp. [Member]    
IFRS Statement [Line Items]    
Principal Activities Eye tracking chip and module  
Place of Incorporation and operation Taipei, Taiwan  
Carrying amount $ 1,156 $ 1,473
Holding 49.35% 49.32%
Iris Optronics Co Ltd. [Member]    
IFRS Statement [Line Items]    
Principal Activities E-paper manufacturing and sales  
Place of Incorporation and operation Tainan, Taiwan  
Carrying amount $ 41 $ 44
Holding 1.25% 1.55%
Kneron Inc. [Member]    
IFRS Statement [Line Items]    
Principal Activities Artificial intelligence chip design  
Place of Incorporation and operation California, USA  
Carrying amount $ 0 $ 0
Holding 0.00% 0.00%
ViewsilMicroelectronics (Kunshan) Limited [Member]    
IFRS Statement [Line Items]    
Principal Activities IC design and sales  
Place of Incorporation and operation Kunshan, China  
Carrying amount $ 2,549 $ 2,547
Holding 49.00% 49.00%