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Share-based payments - Summary of share-based payments (Detail) | 12 Months Ended
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Oct. 27, 2025 | Jun. 30, 2025 Shares $ / shares | Jun. 30, 2025 Shares $ / shares $ / shares | Jun. 30, 2024 $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Balance at the start of the year, share options |  | 10,180,000 | 10,180,000 |
Granted, share options | Shares |  | 6,000 | 6,000 |
Expired / lapsed on termination of employment |  | (2,100,000) | (2,100,000) | (4,600,000)
Balance at the end of the year, share options |  | 8,080,000 | 8,080,000 | 10,180,000
Balance at the start of the year, Weighted average exercise price |  | $ 0.72 |  | $ 0.63
Granted, Weighted average exercise price |  | 0 |  | 0
Exercised, Weighted average exercise price |  | 0 |  | 0
Expired, Weighted average exercise price |  | 1.07 |  | 0.43
Balance at the end of the year, Weighted average exercise price |  | $ 0.63 |  | $ 0.72
Ordinary shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Balance at the start of the year, share options |  | 10,180,000 | 10,180,000 | 14,780,000
Forfeited, share options |  | (25,000) | (25,000) | (3,400,000)
Expired / lapsed on termination of employment |  | (2,075,000) | (2,075,000) | (1,200,000)
Balance at the end of the year, share options |  | 8,080,000 | 8,080,000 | 10,180,000
Exercisable at the end of the financial year, share option |  | 7,805,000 | 7,805,000 | 7,290,000
Balance at the start of the year, Weighted average exercise price |  | $ 0.72 |  | $ 0.63
Forfeited, Weighted average exercise price |  | 0.94 |  | 0.42
Expired, Weighted average exercise price |  | 1.08 |  | 0.49
Balance at the end of the year, Weighted average exercise price |  | 0.63 |  | 0.72
Exercisable at the end of the financial year, Weighted average exercise price |  | $ 0.65 | $ 0.65 | $ 0.84
American Depository Shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Balance at the start of the year, share options |  | 52,000 | 52,000 | 0
Granted, share options |  | 33,467 | 33,467 | 57,000
Forfeited, share options |  | 0 | 0 | (5,000)
Balance at the end of the year, share options |  | 85,467 | 85,467 | 52,000
Exercisable at the end of the financial year, share option |  | 50,217 | 50,217 | 0
Balance at the start of the year, Weighted average exercise price |  | $ 27.9 |  | $ 0
Granted, Weighted average exercise price |  | 37.35 |  | 28
Forfeited, Weighted average exercise price |  | 0 |  | 28.8
Expired, Weighted average exercise price |  | 0 |  |
Balance at the end of the year, Weighted average exercise price |  | 30.08 |  | 27.9
Exercisable at the end of the financial year, Weighted average exercise price |  | $ 31.83 | $ 31.83 | $ 0
Tranche 3 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  |  |  | 13/11/2019
Expiry date |  |  |  | Jan. 04, 2024
Exercise price |  |  |  | $ 0.49
Balance at the start of the year, share options |  | 0 | 0 | 1,200,000
Expired / lapsed on termination of employment |  |  |  | (1,200,000)
Balance at the end of the year, share options |  |  |  | 0
Tranche 4 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 13/01/2020 | 13/01/2020 | 13/01/2020
Expiry date |  | Jan. 13, 2025 | Jan. 13, 2025 | Jan. 13, 2025
Exercise price |  | $ 0.88 |  | $ 0.88
Balance at the start of the year, share options |  | 137,500 | 137,500 | 187,500
Expired / lapsed on termination of employment |  | (137,500) | (137,500) | (50,000)
Balance at the end of the year, share options |  | 0 | 0 | 137,500
Tranche 5 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 09/11/2020 | 09/11/2020 | 09/11/2020
Expiry date |  | Nov. 09, 2024 | Nov. 09, 2024 | Nov. 09, 2024
Exercise price |  | $ 1.13 |  | $ 1.13
Balance at the start of the year, share options |  | 1,200,000 | 1,200,000 | 1,200,000
Expired / lapsed on termination of employment |  | (1,200,000) | (1,200,000) |
Balance at the end of the year, share options |  | 0 | 0 | 1,200,000
Tranche 6 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 09/11/2020 | 09/11/2020 | 09/11/2020
Expiry date |  | Jan. 13, 2025 | Jan. 13, 2025 | Jan. 13, 2025
Exercise price |  | $ 0.88 |  | $ 0.88
Balance at the start of the year, share options |  | 600,000 | 600,000 | 600,000
Expired / lapsed on termination of employment |  | (600,000) | (600,000) |
Balance at the end of the year, share options |  | 0 | 0 | 600,000
Tranche 7 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 04/01/2021 | 04/01/2021 | 04/01/2021
Expiry date |  | Jan. 04, 2025 | Jan. 04, 2025 | Jan. 04, 2025
Exercise price |  | $ 1.69 |  | $ 1.69
Balance at the start of the year, share options |  | 137,500 | 137,500 | 187,500
Expired / lapsed on termination of employment |  | (137,500) | (137,500) | (50,000)
Balance at the end of the year, share options |  | 0 | 0 | 137,500
Tranche 8 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 09/09/2021 | 09/09/2021 | 09/09/2021
Expiry date |  | Jun. 26, 2026 | Jun. 26, 2026 | Jun. 26, 2026
Exercise price |  | $ 1.37 |  | $ 1.37
Balance at the start of the year, share options |  | 100,000 | 100,000 | 100,000
Balance at the end of the year, share options |  | 100,000 | 100,000 | 100,000
Tranche 9 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 16/11/2021 | 16/11/2021 | 16/11/2021
Expiry date |  | Nov. 16, 2025 | Nov. 16, 2025 | Nov. 16, 2025
Exercise price |  | $ 1.69 |  | $ 1.69
Balance at the start of the year, share options |  | 750,000 | 750,000 | 750,000
Balance at the end of the year, share options |  | 750,000 | 750,000 | 750,000
Tranche 10 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 16/11/2021 | 16/11/2021 | 16/11/2021
Expiry date |  | Nov. 16, 2025 | Nov. 16, 2025 | Nov. 16, 2025
Exercise price |  | $ 2.24 |  | $ 2.24
Balance at the start of the year, share options |  | 500,000 | 500,000 | 500,000
Balance at the end of the year, share options |  | 500,000 | 500,000 | 500,000
Tranche 11 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 16/11/2021 | 16/11/2021 | 16/11/2021
Expiry date |  | Nov. 16, 2025 | Nov. 16, 2025 | Nov. 16, 2025
Exercise price |  | $ 1.56 |  | $ 1.56
Balance at the start of the year, share options |  | 800,000 | 800,000 | 800,000
Balance at the end of the year, share options |  | 800,000 | 800,000 | 800,000
Tranche 12 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  |  |  | 01/02/2022
Expiry date |  |  |  | Feb. 01, 2027
Exercise price |  |  |  | $ 0.94
Balance at the start of the year, share options |  | 0 | 0 | 800,000
Expired / lapsed on termination of employment |  |  |  | (800,000)
Balance at the end of the year, share options |  |  |  | 0
Tranche 13 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 01/02/2022 | 01/02/2022 | 01/02/2022
Expiry date |  | Feb. 01, 2027 | Feb. 01, 2027 | Feb. 01, 2027
Exercise price |  | $ 0.94 |  | $ 0.94
Balance at the start of the year, share options |  | 325,000 | 325,000 | 425,000
Forfeited, share options | (25,000) |  |  |
Expired / lapsed on termination of employment |  | (25,000) | (25,000) | (100,000)
Balance at the end of the year, share options |  | 300,000 | 300,000 | 325,000
Tranche 14 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 24/05/2022 | 24/05/2022 | 24/05/2022
Expiry date |  | May 24, 2027 | May 24, 2027 | May 24, 2027
Exercise price |  | $ 0.78 |  | $ 0.78
Balance at the start of the year, share options |  | 100,000 | 100,000 | 100,000
Balance at the end of the year, share options |  | 100,000 | 100,000 | 100,000
Tranche 15 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 03/03/2023 | 03/03/2023 | 03/03/2023
Expiry date |  | Mar. 03, 2027 | Mar. 03, 2027 | Mar. 03, 2027
Exercise price |  | $ 0.15 |  | $ 0.15
Balance at the start of the year, share options |  | 2,530,000 | 2,530,000 | 3,930,000
Granted, share options |  |  |  | 0
Expired / lapsed on termination of employment |  | 0 | 0 | (1,400,000)
Balance at the end of the year, share options |  | 2,530,000 | 2,530,000 | 2,530,000
Tranche 16 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 03/05/2023 | 03/05/2023 | 05/03/2023
Expiry date |  | May 03, 2027 | May 03, 2027 | May 03, 2027
Exercise price |  | $ 0.19 |  | $ 0.19
Balance at the start of the year, share options |  | 3,000,000 | 3,000,000 | 4,000,000
Granted, share options |  |  |  | 0
Expired / lapsed on termination of employment |  | 0 | 0 | (1,000,000)
Balance at the end of the year, share options |  | 3,000,000 | 3,000,000 | 3,000,000
Tranche 17 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 22/04/2024 | 22/04/2024 |
Expiry date |  | Apr. 22, 2029 | Apr. 22, 2029 |
Exercise price |  | $ 0.59 |  |
Balance at the start of the year, share options |  |  |  | 14,780,000
Tranche 17 [member] | American Depository Shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 22/04/2024 | 22/04/2024 |
Expiry date |  | Apr. 22, 2029 | Apr. 22, 2029 |
Exercise price |  | $ 29.3 |  |
Balance at the start of the year, share options |  | 30,000 | 30,000 |
Granted, share options |  | 0 | 0 |
Balance at the end of the year, share options |  | 30,000 | 30,000 | 30,000
Tranche 18 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 17/06/2024 | 17/06/2024 |
Expiry date |  | Jun. 17, 2029 | Jun. 17, 2029 |
Exercise price |  | $ 0.58 |  |
Tranche 18 [member] | American Depository Shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 17/06/2024 | 17/06/2024 |
Expiry date |  | Jun. 17, 2029 | Jun. 17, 2029 |
Exercise price |  | $ 25.65 |  |
Balance at the start of the year, share options |  | 17,000 | 17,000 |
Granted, share options |  | 0 | 0 |
Expired / lapsed on termination of employment |  | 0 | 0 |
Balance at the end of the year, share options |  | 17,000 | 17,000 | 17,000
Tranche 19 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 27/06/2024 | 27/06/2024 |
Expiry date |  | Jun. 27, 2030 | Jun. 27, 2030 |
Exercise price |  | $ 0.33 |  |
Tranche 19 [member] | American Depository Shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 27/06/2024 | 27/06/2024 |
Expiry date |  | Jun. 27, 2030 | Jun. 27, 2030 |
Exercise price |  | $ 14.85 |  |
Balance at the start of the year, share options |  | 5,000 | 5,000 |
Granted, share options |  | 0 | 0 |
Balance at the end of the year, share options |  | 5,000 | 5,000 | 5,000
Tranche 20 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 11/09/2024 | 11/09/2024 |
Expiry date |  | Sep. 11, 2029 | Sep. 11, 2029 |
Exercise price |  | $ 0.5 |  |
Tranche 20 [member] | American Depository Shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 11/09/2024 | 11/09/2024 |
Expiry date |  | Sep. 11, 2029 | Sep. 11, 2029 |
Exercise price |  |  | $ 24.8 |
Granted, share options |  | 6,000 | 6,000 |
Balance at the end of the year, share options |  | 6,000 | 6,000 |
Tranche 21-22 [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 14/01/2025 | 14/01/2025 |
Expiry date |  | Jul. 14, 2030 | Jul. 14, 2030 |
Exercise price |  | $ 1.5 |  |
Tranche 21-22 [member] | American Depository Shares [member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Grant date |  | 14/01/2025 | 14/01/2025 |
Expiry date |  | Jul. 14, 2030 | Jul. 14, 2030 |
Exercise price |  |  | $ 7.5 |
Granted, share options |  | 27,467 | 27,467 |
Balance at the end of the year, share options |  | 27,467 | 27,467 |

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