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Share-based payments - Summary of share-based payments (Detail) | 12 Months Ended
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Jun. 30, 2024 shares $ / shares | Jun. 30, 2023 $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Balance at the start of the year, share options | 14,780,000 | 8,655,500
Granted, share options | 2,850,000 | 7,930,000
Expired / lapsed on termination of employment | (4,600,000) | (1,805,500)
Balance at the end of the year, share options | 10,180,000 | 14,780,000
Balance at the start of the year, Weighted average exercise price | $ 0.6292 | $ 1.2826
Granted, Weighted average exercise price | 0 | 0.1785
Exercised, Weighted average exercise price | 0 | 0
Expired, Weighted average exercise price | 0.4349 | 1.8977
Balance at the end of the year, Weighted average exercise price | $ 0.7207 | $ 0.6292
Ordinary shares [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Balance at the start of the year, share options | 14,780,000 | 8,655,500
Granted, share options |  | 7,930,000
Forfeited, share options | (3,400,000) | (1,550,000)
Expired / lapsed on termination of employment | (1,200,000) | (255,500)
Balance at the end of the year, share options | 10,180,000 | 14,780,000
Exercisable at the end of the financial year, share option | 7,290,000 | 6,483,333
Balance at the start of the year, Weighted average exercise price | $ 0.63 | $ 1.28
Granted, Weighted average exercise price |  | 0.18
Forfeited, Weighted average exercise price | 0.42 | 1.9
Expired, Weighted average exercise price | 0.49 | 1.9
Balance at the end of the year, Weighted average exercise price | 0.72 | 0.63
Exercisable at the end of the financial year, Weighted average exercise price | $ 0.84 | $ 0.96
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 | 0 | 0
Granted, share options | 2,850,000 | 0
Forfeited, share options | (250,000) |
Expired / lapsed on termination of employment | (250,000) |
Balance at the end of the year, share options | 2,600,000 | 0
Exercisable at the end of the financial year, share option | 0 | 0
Balance at the start of the year, Weighted average exercise price | $ 0 | $ 0
Granted, Weighted average exercise price | 0.56 | 0
Forfeited, Weighted average exercise price | 0.576 |
Expired, Weighted average exercise price | 0.576 |
Balance at the end of the year, Weighted average exercise price | 0.558 | 0
Exercisable at the end of the financial year, Weighted average exercise price | $ 0 | $ 0
Tranche 1 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date |  | 07/08/2017
Expiry date |  | Aug. 07, 2022
Exercise price |  | $ 0.67
Balance at the start of the year, share options |  | 15,500
Expired / lapsed on termination of employment |  | (15,500)
Tranche 2 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date |  | 05/02/2018
Expiry date |  | Feb. 05, 2023
Exercise price |  | $ 0.7802
Balance at the start of the year, share options |  | 240,000
Expired / lapsed on termination of employment |  | (240,000)
Tranche 3 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 13/11/2019 | 13/11/2019
Expiry date | Jan. 04, 2024 | Jan. 04, 2024
Exercise price | $ 0.4925 | $ 0.4925
Balance at the start of the year, share options | 1,200,000 | 1,200,000
Expired / lapsed on termination of employment | (1,200,000) |
Balance at the end of the year, share options |  | 1,200,000
Tranche 4 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 13/01/2020 | 13/01/2020
Expiry date | Jan. 13, 2025 | Jan. 13, 2025
Exercise price | $ 0.8812 | $ 0.8812
Balance at the start of the year, share options | 187,500 | 200,000
Expired / lapsed on termination of employment | (50,000) | (12,500)
Balance at the end of the year, share options | 137,500 | 187,500
Tranche 5 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 09/11/2020 | 09/11/2020
Expiry date | Nov. 09, 2024 | Nov. 09, 2024
Exercise price | $ 1.132 | $ 1.132
Balance at the start of the year, share options | 1,200,000 | 1,200,000
Balance at the end of the year, share options | 1,200,000 | 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
Expiry date | Jan. 13, 2025 | Jan. 13, 2025
Exercise price | $ 0.8812 | $ 0.8812
Balance at the start of the year, share options | 600,000 | 800,000
Expired / lapsed on termination of employment |  | (200,000)
Balance at the end of the year, share options | 600,000 | 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
Expiry date | Jan. 04, 2025 | Jan. 04, 2025
Exercise price | $ 1.69 | $ 1.69
Balance at the start of the year, share options | 187,500 | 200,000
Expired / lapsed on termination of employment | (50,000) | (12,500)
Balance at the end of the year, share options | 137,500 | 187,500
Tranche 8 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 09/09/2021 | 09/09/2021
Expiry date | Jun. 26, 2026 | Jun. 26, 2026
Exercise price | $ 1.365 | $ 1.365
Balance at the start of the year, share options | 100,000 | 100,000
Balance at the end of the year, share options | 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
Expiry date | Nov. 16, 2025 | Nov. 16, 2025
Exercise price | $ 1.69 | $ 1.69
Balance at the start of the year, share options | 750,000 | 1,000,000
Expired / lapsed on termination of employment |  | (250,000)
Balance at the end of the year, share options | 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
Expiry date | Nov. 16, 2025 | Nov. 16, 2025
Exercise price | $ 2.24 | $ 2.24
Balance at the start of the year, share options | 500,000 | 1,500,000
Expired / lapsed on termination of employment |  | (1,000,000)
Balance at the end of the year, share options | 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
Expiry date | 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
Balance at the end of the year, share options | 800,000 | 800,000
Tranche 12 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 01/02/2022 | 01/02/2022
Expiry date | Feb. 01, 2027 | Feb. 01, 2027
Exercise price | $ 0.94 | $ 0.94
Balance at the start of the year, share options | 800,000 | 800,000
Expired / lapsed on termination of employment | (800,000) |
Balance at the end of the year, share options |  | 800,000
Tranche 13 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 01/02/2022 | 01/02/2022
Expiry date | Feb. 01, 2027 | Feb. 01, 2027
Exercise price | $ 0.94 | $ 0.94
Balance at the start of the year, share options | 425,000 | 500,000
Expired / lapsed on termination of employment | (100,000) | (75,000)
Balance at the end of the year, share options | 325,000 | 425,000
Tranche 14 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 24/05/2022 | 24/05/2022
Expiry date | 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
Balance at the end of the year, share options | 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
Expiry date | Mar. 03, 2027 | Mar. 03, 2027
Exercise price | $ 0.15 | $ 0.15
Balance at the start of the year, share options | 3,930,000 |
Granted, share options |  | 3,930,000
Expired / lapsed on termination of employment | (1,400,000) |
Balance at the end of the year, share options | 2,530,000 | 3,930,000
Tranche 16 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 03/05/2023 | 05/03/2023
Expiry date | May 03, 2027 | May 03, 2027
Exercise price | $ 0.187 | $ 0.187
Balance at the start of the year, share options | 4,000,000 |
Granted, share options |  | 4,000,000
Expired / lapsed on termination of employment | (1,000,000) |
Balance at the end of the year, share options | 3,000,000 | 4,000,000
Tranche 17 [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 | $ 0.78 |
Tranche 17 [member] | American Depository Shares [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 22/04/2024 |
Expiry date | Apr. 22, 2029 |
Exercise price | $ 0.586 |
Granted, share options | 1,500,000 |
Balance at the end of the year, share options | 1,500,000 |
Tranche 18 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 17/06/2024 |
Expiry date | Jun. 17, 2029 |
Exercise price | $ 0.5757 |
Tranche 18 [member] | American Depository Shares [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 17/06/2024 |
Expiry date | Jun. 17, 2029 |
Exercise price | $ 0.513 |
Granted, share options | 1,100,000 |
Expired / lapsed on termination of employment | (250,000) |
Balance at the end of the year, share options | 850,000 |
Tranche 19 [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 24/05/2022 |
Expiry date | May 24, 2027 |
Exercise price | $ 0.15 |
Tranche 19 [member] | American Depository Shares [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Grant date | 27/06/2024 |
Expiry date | Jun. 27, 2030 |
Exercise price | $ 0.297 |
Granted, share options | 250,000 |
Balance at the end of the year, share options | 250,000 |

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