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Financial assets at amortized cost (Tables)
12 Months Ended
Dec. 31, 2021
Text block [abstract]  
Summary of Financial Assets at Amortized Cost
                                                       
    
December 31,
2020
    
December 31,
2021
 
    
NT$000
    
NT$000
 
Current:
                 
Time deposits
  
 
   206,482
  
  
 
     29,239
  
    
 
 
    
 
 
 
Non-current:
                 
Restricted bank deposits
  
 
48,319
 
  
 
37,539
 
    
 
 
    
 
 
 
  a)
Amounts recognized in profit or loss in relation to financial assets at amortized cost are listed below:
 
    
Year ended December 31,
 
    
2019
    
2020
    
2021
 
    
NT$000
    
NT$000
    
NT$000
 
Interest income
  
 
4,467
 
  
 
2,206
 
  
 
1,187