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Key Management Personnel Disclosures - Summary of Number of Shares Held in Company (Detail)
 12 Months Ended
Jun. 30, 2023
shares
Jun. 30, 2022
shares
Jun. 30, 2021
shares
American Depository Receipts [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 17,106 45 45
Received during the fiscal year on the exercise of performance rights 0 17,061  
Received during the fiscal year on the exercise of options 0 0  
Other changes during the fiscal year 0 [1] 0  
Balance at end of the end fiscal year Number 17,106 17,106 45
Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 25,927,035 22,917,519 19,907,228
Received during the fiscal year on the exercise of performance rights 4,606,173 2,700,000 3,650,291
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year (3,477,092) [1] 309,516 [1] (640,000) [2]
Balance at end of the end fiscal year Number 27,056,116 25,927,035 22,917,519
Dr Russell Howard [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 1,000,000 750,000 500,000
Received during the fiscal year on the exercise of performance rights 113,207 250,000 250,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year   0 [1] 0 [2]
Balance at end of the end fiscal year Number 1,113,207 1,000,000 750,000
Mr Pete Meyers [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 2,274,395 1,774,395 1,500,758
Received during the fiscal year on the exercise of performance rights 500,000 500,000 273,637
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year   0 [1] 0 [2]
Balance at end of the end fiscal year Number 2,774,395 2,274,395 1,774,395
Mr Marc Voigt [member] | American Depository Receipts [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 45 45 45
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 0 [1] 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 end of the end fiscal year Number 8,847,445 8,847,445 7,647,445
Received during the fiscal year on the exercise of performance rights 2,400,000 0 1,200,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year   0 [1] 0 [2]
Balance at end of the end fiscal year Number 11,247,445 8,847,445 8,847,445
Mr Grant Chamberlain [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 0 1,728,023 1,301,369
Received during the fiscal year on the exercise of performance rights   450,000 426,654
Received during the fiscal year on the exercise of options   0 0
Other changes during the fiscal year   (2,178,023) [1],[3] 0 [2]
Balance at end of the end fiscal year Number   0 1,728,023
Ms Lucy Turnbull A O [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 3,284,126 0  
Received during the fiscal year on the exercise of performance rights 92,966 0  
Received during the fiscal year on the exercise of options 0 0  
Other changes during the fiscal year [1] (3,377,092) [3] 3,284,126 [4]  
Balance at end of the end fiscal year Number 0 3,284,126 0
Ms Lis Boyce [Member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Received during the fiscal year on the exercise of performance rights 0    
Received during the fiscal year on the exercise of options 0    
Balance at end of the end fiscal year Number 0    
Ms Deanne Miller [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 2,767,305 2,963,892 3,003,892
Received during the fiscal year on the exercise of performance rights 600,000 600,000 600,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year (100,000) [1] (796,587) [1] (640,000) [2]
Balance at end of the end fiscal year Number 3,267,305 2,767,305 2,963,892
Dr Frederic Triebel [member] | American Depository Receipts [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 17,061 0  
Received during the fiscal year on the exercise of performance rights 0 17,061  
Received during the fiscal year on the exercise of options 0 0  
Other changes during the fiscal year 0 0  
Balance at end of the end fiscal year Number 17,061 17,061 0
Dr Frederic Triebel [member] | Ordinary Shares [member]      
Changes In Number Of Shares Outstanding [line items]      
Balance at end of the end fiscal year Number 7,753,764 6,853,764 5,953,764
Received during the fiscal year on the exercise of performance rights 900,000 900,000 900,000
Received during the fiscal year on the exercise of options 0 0 0
Other changes during the fiscal year   0 [1] 0 [2]
Balance at end of the end fiscal year Number 8,653,764 7,753,764 6,853,764
[1] Other changes during the year includes on market acquisitions and/or disposals
[2] Other changes during the year include the shares acquired via the Entitlements Offer, on market acquisition and disposals.
[3] This change during the year represents derecognition due to the cessation of the director’s position
[4] This change during the year represents Ms Lucy Turnbull’s shareholding before she became director on February 25, 2022. The shareholding includes 2,981,626 shares held directly and 302,500 shares held indirectly.