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Property and equipment, net (Tables)
12 Months Ended
Jun. 30, 2025
Property, Plant and Equipment, Net [Abstract]  
Summary of property and equipment net
(US$’000)
  
June 30,
2025
 
  
June 30,
2024
 
Software
   $ 6      $ 6  
Lab equipment
     1,533        1,521  
Computer hardware
     32        32  
Furniture and fixtures
     6        —   
Leasehold improvements
     24        24  
  
 
 
    
 
 
 
Total property and equipment, gross
     1,601        1,583  
  
 
 
    
 
 
 
Accumulated depreciation and amortization
     (1,470      (1,404
  
 
 
    
 
 
 
Total property and equipment, net
   $ 131      $ 179