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Share-based payments, Reconciliation of Outstanding Share Options (Details) - Share Options [Member]
12 Months Ended
Jun. 30, 2023
shares
$ / shares
Jun. 30, 2022
shares
$ / shares
Number of Options [Abstract]    
Outstanding at beginning of year (in shares) | shares 9,010,547 4,143,415
Granted during the year (in shares) | shares 0 5,126,484
Forfeited during the year (in shares) | shares (103,708) (259,352)
Exercised during the period (in shares) | shares 0 0
Outstanding at end of year (in shares) | shares 8,906,839 9,010,547
Exercisable at end of year (in shares) | shares 3,485,302 3,351,327
Weighted Average Exercise Price [Abstract]    
Outstanding at beginning of year (in dollars per share) $ 41.67 $ 3.03
Granted during the year (in dollars per share) 0 71.19
Forfeited during the year (in dollars per share) 20.03 8.01
Exercised during the period (in dollars per share) 0 0
Outstanding at end of year (in dollars per share) 41.93 41.67
Exercisable at end of year (in dollars per share) $ 2.97 $ 3.04
Weighted average remaining contractual life 7 years 6 months 25 days 8 years 8 months 8 days
Minimum [Member]    
Weighted Average Exercise Price [Abstract]    
Outstanding at beginning of year (in dollars per share) $ 1.53  
Outstanding at end of year (in dollars per share) 1.53 $ 1.53
Maximum [Member]    
Weighted Average Exercise Price [Abstract]    
Outstanding at beginning of year (in dollars per share) 75  
Outstanding at end of year (in dollars per share) $ 75 $ 75