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Intangibles - Summary of reconciliations of intangibles (Detail) - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Disclosure of detailed information about intangible assets [line items]    
Beginning balance $ 15,400 $ 17,269
Impairment of assets 6,440 (13,379)
Amortisation expense (934) (1,869)
Ending balance 1,087 15,400
Paxalisib licensing agreement [member]    
Disclosure of detailed information about intangible assets [line items]    
Beginning balance 8,073 9,157
Impairment of assets   (6,444)
Amortisation expense (542) (1,084)
Ending balance 1,087 8,073
EVT801 licensing agreement [Member]    
Disclosure of detailed information about intangible assets [line items]    
Beginning balance 7,327 8,112
Impairment of assets 6,900 (6,935)
Amortisation expense (392) (785)
Ending balance $ 0 $ 7,327