v3.26.3
Key Management Personnel Disclosures - Summary of Number of Shares Held in Company (Detail)
 12 Months Ended
Jun. 30, 2026
shares
Jun. 30, 2025
shares
Jun. 30, 2024
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 35,243,278 29,196,831 27,056,116
Received during the fiscal year on the exercise of performance rights 4,115,157 6,816,947 500,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] (200,000) (770,500) (1,200,000)
Balance at end of the end fiscal year Number 39,158,435 35,243,278 29,196,831
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 1,417,977 1,113,207 1,113,207
Received during the fiscal year on the exercise of performance rights 300,000 304,770 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 1,717,977 1,417,977 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 3,663,284 3,274,395 2,774,395
Received during the fiscal year on the exercise of performance rights 388,889 388,889 500,000
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 4,052,173 3,663,284 3,274,395
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 13,676,945 11,247,445 11,247,445
Received during the fiscal year on the exercise of performance rights 1,200,000 2,400,000 0
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] 0 29,500 0
Balance at end of the end fiscal year Number 14,876,945 13,676,945 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 10,453,764 8,653,764 8,653,764
Received during the fiscal year on the exercise of performance rights 900,000 1,800,000 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 11,353,764 10,453,764 8,653,764
Ms Lis Boyce [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 256,621 0 0
Received during the fiscal year on the exercise of performance rights 166,667 256,621 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 423,288 256,621 0
Ms Deanne Miller [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 2,467,305 2,067,305 3,267,305
Received during the fiscal year on the exercise of performance rights 600,000 1,200,000 0
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year [1] (200,000) (800,000) (1,200,000)
Balance at end of the end fiscal year Number 2,867,305 2,467,305 2,067,305
Mr Christian Mueller [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 3,307,382 2,840,715 [2]  
Received during the fiscal year on the exercise of performance rights 466,666 466,667 [2]  
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 3,774,048 3,307,382 2,840,715 [2]
Dr Stephan Winckels [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 92,935    
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 92,935 0  
Ms A Anderson [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 0 0 0
Received during the fiscal year on the exercise of performance rights   0 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   0 0
Dr F Vogl [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at start of the fiscal year Number 0 0 0
Received during the fiscal year on the exercise of performance rights   0 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   0 0
[1] Other changes during the year include on market acquisitions and/or disposals.
[2] Shares held before being appointed as key management personnel.