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Fair value measurement - Summary of movements in level 3 assets and liabilities (Detail) - At fair value [member] - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Disclosure of detailed information about movements in level 3 assets and liabilities [Line Items]    
Balance Beginning $ 13,483 $ 6,871
Gain (loss) recognized in profit or loss (4,527) (1,123)
Issuance of warrants 3,034 8,599
Exercise of warrants (8,840) (864)
Balance Ending 3,150 13,483
Level 3 [member]    
Disclosure of detailed information about movements in level 3 assets and liabilities [Line Items]    
Balance Beginning 13,483 6,871
Gain (loss) recognized in profit or loss (4,527) (1,123)
Issuance of warrants 3,034 8,599
Exercise of warrants (8,840) (864)
Balance Ending $ 3,150 $ 13,483