v3.26.1
Leases - Right-of-use assets (Details) - USD ($)
$ in Thousands
 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period $ 595  
Charge (378) $ (148)
Right of use assets at end of period 1,771 595
Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period 1,179  
Additions 1,556  
Modifications 21  
Foreign exchange on translation (2)  
Right of use assets at end of period 2,754  
Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period (584)  
Charge (378)  
Foreign exchange on translation (21)  
Right of use assets at end of period (983)  
Land & buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at end of period 1,755 542
Land & buildings | Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period 1,100  
Additions 1,556  
Modifications 21  
Foreign exchange on translation (2)  
Right of use assets at end of period 2,675  
Land & buildings | Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period (558)  
Charge (361)  
Foreign exchange on translation (1)  
Right of use assets at end of period (920)  
IT equipment    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at end of period 16 $ 53
IT equipment | Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period 79  
Right of use assets at end of period 79  
IT equipment | Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets at beginning of period (26)  
Charge (17)  
Foreign exchange on translation (20)  
Right of use assets at end of period $ (63)