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Significant changes in the current reporting period (Details)
$ / shares in Units, $ in Millions, $ in Millions
 6 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2023
AUD ($)
$ / shares
Dec. 31, 2022
$ / shares
Dec. 31, 2021
Mar. 31, 2021
$ / shares
Disclosure Of Significant Changes In Current Reporting Period [Line Items]          
Proceeds from private placement $ 39.7        
Private Placement          
Disclosure Of Significant Changes In Current Reporting Period [Line Items]          
Conversion ratio of warrants   0.25   0.25  
Number of shares issued, value   $ 60.3      
Exercise price (in australian dollars per share) | $ / shares   $ 0.30 $ 0.75   $ 2.30