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Key management personnel (Tables)
 12 Months Ended
Jun. 30, 2021
Disclosure of transactions between related parties [abstract]  
Summary of Key Management Personnel
Key management personnel compensation comprises:
 
    
2021
      2020      2019  
    
US$
      US$      US$  
Short-term employee benefits
   
 
14,081,625
 
      12,564,637        11,557,506  
Post-employment benefits
   
 
744,951
 
      1,172,727        1,490,716  
Share-based payments
   
 
11,601,866
 
      13,514,588        15,821,972  
    
 
 
     
 
 
     
 
 
  
Total
   
 
26,428,442
 
      27,251,952        28,870,194