v3.26.3
Others - Financial instruments, schedule of significant financial assets and liabilities denominated in foreign currencies (Details)
€ in Thousands, ¥ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2026
TWD ($)
Jun. 30, 2026
EUR (€)
Jun. 30, 2026
JPY (¥)
Dec. 31, 2025
TWD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
JPY (¥)
Dec. 31, 2025
CNY (¥)
Financial instruments                  
Currency amount, assets $ 183,691 $ 180,567              
Foreign exchange risk | NTD:USD                  
Financial instruments                  
Currency amount, assets $ 2,683 $ 8,040 $ 85,431     $ 252,844      
Exchange rate 0.0314 0.0318 0.0314 0.0314 0.0314 0.0318 0.0318 0.0318 0.0318
Degree of variation, assets 1.00% 1.00%              
Effect on profit or loss, assets $ 27 $ 80              
Foreign exchange risk | EUR:USD                  
Financial instruments                  
Currency amount, assets 385 473   € 338     € 403    
Currency amount, liabilities $ 254 $ 282   € 223     € 240    
Exchange rate 1.1393 1.1740 1.1393 1.1393 1.1393 1.1740 1.1740 1.1740 1.1740
Degree of variation, assets 1.00% 1.00%              
Degree of variation, liabilities 1.00% 1.00%              
Effect on profit or loss, assets $ 4 $ 5              
Effect on profit or loss, liabilities 3 3              
Foreign exchange risk | JPY:USD                  
Financial instruments                  
Currency amount, assets $ 3,478 $ 2,603     ¥ 561,048     ¥ 406,761  
Exchange rate 0.0062 0.0064 0.0062 0.0062 0.0062 0.0064 0.0064 0.0064 0.0064
Degree of variation, assets 1.00% 1.00%              
Effect on profit or loss, assets $ 35 $ 26              
Foreign exchange risk | USD:RMB                  
Financial instruments                  
Currency amount, assets   $ 327             ¥ 2,286
Exchange rate   6.9907       6.9907 6.9907 6.9907 6.9907
Degree of variation, assets   1.00%              
Effect on profit or loss, assets   $ 3              
Foreign exchange risk | USD:JPY                  
Financial instruments                  
Currency amount, assets 314       ¥ 50,947        
Currency amount, liabilities $ 66 $ 98     ¥ 10,709     ¥ 15,339  
Exchange rate 162.25 156.52 162.25 162.25 162.25 156.52 156.52 156.52 156.52
Degree of variation, assets 1.00%                
Degree of variation, liabilities 1.00% 1.00%              
Effect on profit or loss, assets $ 3                
Effect on profit or loss, liabilities $ 1 $ 1