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Key Management Personnel Disclosures - Summary of Number of Shares Held in Company (Detail)
 12 Months Ended
Jun. 30, 2025
shares
Jun. 30, 2024
shares
Jun. 30, 2023
shares
American Depository Receipts [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 17,106 17,106 17,106
Received during the fiscal year on the exercise of performance rights 0 0 0
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0 0 0
Balance at end of the end fiscal year Number 17,106 17,106 17,106
Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 29,196,831 27,056,116 25,927,035
Received during the fiscal year on the exercise of performance rights 6,816,947 500,000 4,606,173
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] (770,500) (1,200,000) (3,477,092)
Balance at end of the end fiscal year Number 35,243,278 29,196,831 27,056,116
Ordinary Shares [member] | Previously Reported [Member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 26,356,116    
Balance at end of the end fiscal year Number   26,356,116  
Dr Russell Howard [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 1,113,207 1,113,207 1,000,000
Received during the fiscal year on the exercise of performance rights 304,770 0 113,207
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0   0
Balance at end of the end fiscal year Number 1,417,977 1,113,207 1,113,207
Mr Pete Meyers [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 3,274,395 2,774,395 2,274,395
Received during the fiscal year on the exercise of performance rights 388,889 500,000 500,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0   0
Balance at end of the end fiscal year Number 3,663,284 3,274,395 2,774,395
Mr Marc Voigt [member] | American Depository Receipts [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 45 45 45
Received during the fiscal year on the exercise of performance rights 0 0 0
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0 0 0
Balance at end of the end fiscal year Number 45 45 45
Mr Marc Voigt [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 11,247,445 11,247,445 8,847,445
Received during the fiscal year on the exercise of performance rights 2,400,000 0 2,400,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 29,500   0
Balance at end of the end fiscal year Number 13,676,945 11,247,445 11,247,445
Dr Frédéric Triebel [member] | American Depository Receipts [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 17,061 17,061 17,061
Received during the fiscal year on the exercise of performance rights 0 0 0
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0 0 0
Balance at end of the end fiscal year Number 17,061 17,061 17,061
Dr Frédéric Triebel [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 8,653,764 8,653,764 7,753,764
Received during the fiscal year on the exercise of performance rights 1,800,000 0 900,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0   0
Balance at end of the end fiscal year Number 10,453,764 8,653,764 8,653,764
Ms Lucy Turnbull A O [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number   0 3,284,126
Received during the fiscal year on the exercise of performance rights     92,966
Received during the fiscal year on the exercise of options     0
Other changes during the fiscal year [1],[2]     (3,377,092)
Balance at end of the end fiscal year Number     0
Mr Christian Mueller [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number [3] 2,840,715    
Received during the fiscal year on the exercise of performance rights [3] 466,667    
Received during the fiscal year on the exercise of options 0    
Other changes during the fiscal year [1] 0    
Balance at end of the end fiscal year Number 3,307,382 2,840,715 [3]  
Ms Lis Boyce [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 0    
Received during the fiscal year on the exercise of performance rights 256,621 0  
Received during the fiscal year on the exercise of options 0 0  
Other changes during the fiscal year [1] 0   0
Balance at end of the end fiscal year Number 256,621 0  
Ms Deanne Miller [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 2,067,305 3,267,305 2,767,305
Received during the fiscal year on the exercise of performance rights 1,200,000 0 600,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] (800,000) (1,200,000) (100,000)
Balance at end of the end fiscal year Number 2,467,305 2,067,305 3,267,305
[1] Other changes during the year includes on market acquisitions and/or disposals.
[2] This change during the year represents derecognition due to the cessation of the director’s position.
[3] Shares held before being appointed as key management personnel.