Details of Significant Accounts - Revenue, schedule of contract liabilities (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Contract assets: | |||
| Unbilled revenue | $ 934 | $ 968 | $ 977 |
| Contract liabilities: | |||
| Advance sales receipts | $ 20,441 | $ 21,902 | $ 17,218 |