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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, 2021
Jun. 30, 2020
Disclosure of detailed information about movements in level 3 assets and liabilities [Line Items]    
Balance Beginning $ 1,845 $ 1,370
Losses recognised in profit or loss 2,570 475
Payout of milestone (3,400)  
Balance Ending 1,015 1,845
Available for sale [member]    
Disclosure of detailed information about movements in level 3 assets and liabilities [Line Items]    
Losses recognised in profit or loss   0
Balance Ending 0  
Level 3 [member]    
Disclosure of detailed information about movements in level 3 assets and liabilities [Line Items]    
Balance Beginning 1,845 1,370
Losses recognised in profit or loss 2,570 475
Payout of milestone (3,400)  
Balance Ending $ 1,015 $ 1,845