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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2022
Disclosure of reconciliation of changes in goodwill [abstract]  
Summary of goodwill
     $  
At January 1, 2021
      3,993,007  
Exchange differences
      (14,942 ) 
    
 
 
  
At December 31, 2021 and January 1, 2022
      3,978,065  
Additions from acquisition (note 33(D))
      33,800,276  
Impairment loss (note 8(c))
      (3,272,253 ) 
Exchange differences
      (705,812 ) 
    
 
 
  
At December 31, 2022
      33,800,276  
 
 
 
 
 
Summary of goodwill balance allocated to the CGUs
 
    
2022
    
2021
 
     $      $  
Prevention EMEA within the Prevention segment
      —          855,284  
Diagnostics EMEA within the Diagnostics segment
      —          3,122,781  
Cancer genetic testing services within the Diagnostics segment
      30,639,976        —    
Sales of medical diagnostics products within the Diagnostics segment
      3,160,300        —    
    
 
 
     
 
 
  
       33,800,276        3,978,065  
 
 
 
 
 
 
 
 
 
    
2022
  
CGU of cancer genetic testing services
         
Pre-tax discount rate
      17.7 % 
Terminal value growth rate
      3.0 % 
Average revenue growth rate
      31.1 % 
CGU of sales of medical diagnostics products
         
Pre-tax discount rate
      15.9 % 
Terminal value growth rate
      3.0 % 
Average revenue growth rate
      18.3 %