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Unissued equity - Additional Information (Detail) $ / shares in Units, $ in Thousands, $ in Thousands | Dec. 23, 2023 USD ($) | Jun. 30, 2025 $ / shares | Jan. 14, 2025 shares | Jun. 19, 2024 $ / shares shares | Dec. 23, 2023 AUD ($) | Dec. 23, 2023 USD ($) | Dec. 20, 2023 shares | Nov. 30, 2023 shares | Oct. 23, 2023 AUD ($) | Oct. 23, 2023 USD ($)
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Disclosure of unissued equity [Line Items] |  |  |  |  |  |  |  |  |  |
Par value per share | $ / shares |  |  |  |  |  |  |  |  |  |
Unsecured Convertible Promissory Note [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of unissued equity [Line Items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 380,224 | $ 250,000 |  |  | $ 776,670 | $ 500,000
Borrowings, interest rate |  |  |  |  |  |  |  |  | 10.00% | 10.00%
Percentage Of Borrowings That Are Called Up For Equity Instrument | 50.00% |  |  |  |  |  |  |  |  |
Interest expense on borrowings | $ | $ 3,014 |  |  |  |  |  |  |  |  |
Cash Paid | $ |  |  |  |  |  | $ 253,014 |  |  |  |
American Depositary Shares [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of unissued equity [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  | 110,688 |  |  |  |  | 52,400 |  |
American Depositary Shares [Member] | Unsecured Convertible Promissory Note [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of unissued equity [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  |  | 11,834 |  |  | 11,834 |  |  |
Ordinary shares [member] | Unsecured Convertible Promissory Note [Member] |  |  |  |  |  |  |  |  |  |
Disclosure of unissued equity [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  |  | 5,916,970 |  |  |  |  |  |
Par value per share | $ / shares |  |  |  | $ 0.0643 |  |  |  |  |  |

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