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Intangibles - Additional Information (Detail) - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Jan. 01, 2025
Disclosure of detailed information about intangible assets [line items]        
Amortisation, intangible assets other than goodwill $ 934 $ 1,869 $ 1,869  
Intangible assets other than goodwill 1,087 15,400 17,269 $ 0
Impairment loss recognised in profit or loss, intangible assets other than goodwill 6,440 (13,379)    
EVT801 Licensing Agreement [Member]        
Disclosure of detailed information about intangible assets [line items]        
Intangible assets other than goodwill 0 7,327 8,112  
Impairment loss recognised in profit or loss, intangible assets other than goodwill 6,900 (6,935)    
EVT801 Licensing Agreement [Member] | Carrying Value Amount [Member]        
Disclosure of detailed information about intangible assets [line items]        
Amortisation, intangible assets other than goodwill   7,300    
Paxalisib Licensing Agreement [Member]        
Disclosure of detailed information about intangible assets [line items]        
Amortisation, intangible assets other than goodwill 542 1,084 1,084  
Intangible assets other than goodwill $ 1,087 8,073 $ 9,157  
Impairment loss recognised in profit or loss, intangible assets other than goodwill   (6,444)    
Paxalisib Licensing Agreement [Member] | Carrying Value Amount [Member]        
Disclosure of detailed information about intangible assets [line items]        
Amortisation, intangible assets other than goodwill   $ 8,100