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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, 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.

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