v3.26.1
Financial instruments - fair values and risk management - Exposure to credit risk and ECL for Trade receivables (Details) - Trade receivables - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Accumulated impairment    
Exposure to credit risk and ECL for Trade receivables    
Financial assets $ 1,462,000  
Credit risk | Cost    
Exposure to credit risk and ECL for Trade receivables    
Financial assets 32,090,000 $ 34,650,000
Credit risk | Accumulated impairment    
Exposure to credit risk and ECL for Trade receivables    
Financial assets $ (1,455,000) $ (1,462,000)
Credit risk | Baa3 To A3    
Exposure to credit risk and ECL for Trade receivables    
Weighted average loss rate 0.03% 0.05%
Credit risk | Baa3 To A3 | Cost    
Exposure to credit risk and ECL for Trade receivables    
Financial assets $ 30,643,000 $ 33,203,000
Credit risk | Baa3 To A3 | Accumulated impairment    
Exposure to credit risk and ECL for Trade receivables    
Financial assets $ (8,000) $ (15,000)
Credit risk | Ca-C To Aa2    
Exposure to credit risk and ECL for Trade receivables    
Weighted average loss rate 100.00% 100.00%
Credit risk | Ca-C To Aa2 | Cost    
Exposure to credit risk and ECL for Trade receivables    
Financial assets $ 1,447,000 $ 1,447,000
Credit risk | Ca-C To Aa2 | Accumulated impairment    
Exposure to credit risk and ECL for Trade receivables    
Financial assets $ (1,447,000) $ (1,447,000)