v3.26.3
Business Combinations, Merger transaction costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Merger transaction costs [abstract]      
Non-recurring merger transaction and integration costs, external services $ 8,200 $ 8,000 $ 0
Non-recurring merger transaction and integration costs, administration and corporate overheads 400 100 0
Non-recurring merger transaction and integration costs, Employee benefits expense 100 0 0
Merger transaction and integration costs [1] 8,738 8,102 0
Piedmont Lithium Inc and Sayona Mining Limited [Member]      
Merger transaction costs [abstract]      
Non-recurring merger transaction and integration costs, external services 8,200    
Non-recurring merger transaction and integration costs, administration and corporate overheads 400    
Non-recurring merger transaction and integration costs, Employee benefits expense 100    
Merger transaction and integration costs 8,700 $ 8,100 $ 0
Acquisition related merger and integration transaction costs recognized to date $ 16,800    
[1] Adjustment to profit/(loss) which is reported as part of ‘Group / unallocated items and eliminations’. Refer to Note 7 for further details.