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Related-party Transactions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IFRS Statement [Line Items]      
Sales of goods $ 125 $ 0 $ 0
Purchase of raw materials 3,532 689  
Accounts payable 265 1,568  
Revenue from miscellaneous service 66    
Miscellaneous fee 795 84  
Other receivable 17    
Other payable 1,641 2,572  
Current receivables due from related parties 1,217 1,200  
Cheng Mei Materials Technology Corporation [Member]      
IFRS Statement [Line Items]      
Purchase of raw materials 3,469 663  
Accounts payable 233 1,530  
Miscellaneous fee 791 84  
Associates [member]      
IFRS Statement [Line Items]      
Revenue from miscellaneous service 63    
Miscellaneous fee 4    
Other receivable 14    
ViewsilMicroelectronics (Kunshan) Limited [Member]      
IFRS Statement [Line Items]      
Technical service fee 1,400 1,400 $ 1,800
Other payable 1,400 2,480  
Other related parties [member]      
IFRS Statement [Line Items]      
Sales of goods 125    
Accounts receivable 71    
Purchase of raw materials 63 26  
Accounts payable 32 38  
Revenue from miscellaneous service 3    
Other receivable 3    
Other payable 241 92  
VST [Member]      
IFRS Statement [Line Items]      
Current receivables due from related parties $ 1,200 $ 1,200