v3.26.1
Financial instruments - fair values and risk management - Credit risk (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
debtor
Dec. 31, 2025
USD ($)
debtor
Trade and other receivables | Accumulated impairment    
Maximum exposure to credit risk    
Financial assets $ 1,455,000 $ 1,462,000
Trade and other receivables | Credit risk | Accumulated impairment    
Maximum exposure to credit risk    
Financial assets $ (1,455,000)  
Trade and other receivables | Credit risk | Customer concentration risk | Largest debtor    
Maximum exposure to credit risk    
Risk concentration 25.00% 25.00%
Trade and other receivables | Credit risk | Customer concentration risk | 3 largest debtors    
Maximum exposure to credit risk    
Risk concentration 55.00% 57.00%
Number of largest debtors | debtor 3 3
Loans receivables    
Maximum exposure to credit risk    
Maximum exposure to credit risk $ 510,000 $ 1,490,000
Loans receivables | Credit risk | Accumulated impairment    
Maximum exposure to credit risk    
Financial assets (35,776,000) (35,776,000)
Trade receivables    
Maximum exposure to credit risk    
Maximum exposure to credit risk 30,226,000 31,743,000
Trade receivables | Accumulated impairment    
Maximum exposure to credit risk    
Financial assets 1,462,000  
Trade receivables | Credit risk | Accumulated impairment    
Maximum exposure to credit risk    
Financial assets (1,455,000) (1,462,000)
Cash    
Maximum exposure to credit risk    
Maximum exposure to credit risk 78,242,000 62,908,000
Other investments - current    
Maximum exposure to credit risk    
Maximum exposure to credit risk 43,249,000 45,408,000
Other investments - non-current    
Maximum exposure to credit risk    
Maximum exposure to credit risk $ 19,013,000 $ 16,415,000