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Contingent consideration - Summary of reconciliation of contingent consideration (Detail) - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure In Tabular Form Of Changes In Contingent Consideration During The Period [Line Items]      
Contingent Consideration $ 8,968 $ 11,094  
Payment of EVT801 milestone   (2,364)  
Interest on unwinding of discount 594 567  
Effect of exchange rates on contingent consideration 697 (329)  
Gain on remeasurement of contingent consideration (3,388) 0 $ 2,570
Contingent Consideration $ 6,871 $ 8,968 $ 11,094