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Equity settled share-based payments - Weighted average grant date fair values (Details)
1 Months Ended 6 Months Ended 12 Months Ended
Oct. 31, 2023
shares
Mar. 31, 2023
shares
$ / shares
Oct. 31, 2022
shares
Dec. 31, 2023
shares
$ / shares
Jun. 30, 2023
shares
$ / shares
Jun. 30, 2022
shares
$ / shares
Jun. 30, 2021
$ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Weighted-average exercise price, outstanding at the beginning (in dollars per share)       $ 0 $ 0.036 $ 0.036 $ 0.036
Weighted-average exercise price, forfeited during the year (in dollars per share)         0.036 0.036 0.036
Weighted-average exercise price, outstanding at the end (in dollars per share)       $ 0 $ 0 $ 0.036 $ 0.036
IFRS Restricted Share Units [Member]              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of options, outstanding at the beginning | shares       6,165,460 0    
Number of options, granted | shares 22,472 5,084,800 143,436 125,672 6,561,596    
Number of options, vested | shares       (209,116) (288,336)    
Number of options, forfeited | shares       (123,760) (107,800)    
Number of options, outstanding at the end | shares       5,958,256 6,165,460 0  
Weighted-average exercise price, outstanding at the beginning (in dollars per share)       $ 0.036 $ 0    
Weighted-average exercise price, granted during the year (in dollars per share)       0.030 0.035    
Weighted-average exercise price, vested during the year (in dollars per share)       0.024 0.026    
Weighted-average exercise price, forfeited during the year (in dollars per share)       0.036 0.036    
Weighted-average exercise price, outstanding at the end (in dollars per share)       0.036 0.036 $ 0  
Weighted-average exercise price, outstanding at the beginning (in dollars per share)       4.22 0    
Weighted-average exercise price, granted (in dollars per share)   $ 0.036   5.37 4.12    
Weighted-average exercise price, vested (in dollars per share)       3.55 2.42    
Weighted-average exercise price, forfeited (in dollars per share)       3.16 2.89    
Weighted-average exercise price, outstanding at the end (in dollars per share)       $ 4.32 $ 4.22 $ 0