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Key Management Personnel Disclosures - Summary of Number of Shares Held in Company (Detail) | 12 Months Ended
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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.

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