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 | |||||||