v3.26.3
RESERVES - Terms and Conditions of Performance Rights (Details)
 12 Months Ended
Jun. 30, 2026
shares
$ / shares
Jun. 30, 2025
shares
$ / shares
Jun. 30, 2024
shares
$ / shares
Terms and conditions of performance rights [Abstract]      
Vesting hurdle (30-day VWAP) (weighted average) | $ / shares $ 18.00 $ 6.02 $ 3.93
Performance Rights      
Terms and conditions of performance rights [Abstract]      
Number of shares converted upon vesting (in shares) 1    
Number of shares vest upon achieving service based condition (in shares) 595,000 24,273,335 5,147,665
Employee Performance Rights, Expiring December 21, 2028 And December 31, 2027      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 2,885,000    
Vesting hurdle (30-day VWAP) (weighted average) | $ / shares $ 4.00    
Employee Performance Rights, Expiring December 21, 2028      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 2,440,000    
Employee Performance Rights, Expiring December 31, 2027      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 445,000    
Director And Employee Performance Rights, Expiring April 2, 2031      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 660,077    
Vesting hurdle (30-day VWAP) (weighted average) | $ / shares $ 18.00    
Performance Rights, Expiring April 10, 2031, VWAP $6.00      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 1,157,803    
Vesting hurdle (30-day VWAP) (weighted average) | $ / shares $ 6.00    
Performance Rights, Expiring April 10, 2031, VWAP $7.00      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 1,157,803    
Vesting hurdle (30-day VWAP) (weighted average) | $ / shares $ 7.00    
Performance Rights, Expiring April 10, 2031, VWAP $8.00      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 1,157,803    
Vesting hurdle (30-day VWAP) (weighted average) | $ / shares $ 8.00    
Employee Performance Rights, Performance Vesting Condition, Expiring December 31, 2026      
Terms and conditions of performance rights [Abstract]      
Number of shares vest upon achieving service based condition (in shares) 30,000