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Current Assets - Prepayments - Summary of Current Assets Prepayments (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Jun. 30, 2024
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Current prepayments [abstract] |  |
Launch Service Agreement | $ 0 | $ 2,700
R&D Contract Research Organization | 0 | 223
Insurance | 608 | 609
Other prepayments | 142 | 365
Total current prepayments | $ 750 | $ 3,897

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