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Financial instruments - Summary of foreign currency risk (Detail) - Foreign currency risk [member] - AUD ($)
$ in Thousands
Jun. 30, 2023
Jun. 30, 2022
Disclosure of detailed information about financial instruments [line items]    
Assets $ 2,326 $ 7,276
Liabilities 3,846 3,276
US dollars [member]    
Disclosure of detailed information about financial instruments [line items]    
Assets 2,326 7,276
Liabilities 1,135 3,071
Euros [member]    
Disclosure of detailed information about financial instruments [line items]    
Liabilities 2,710 $ 205
Singapore, Dollars    
Disclosure of detailed information about financial instruments [line items]    
Liabilities $ 1