Employee benefits (Details 4) - KRW (₩) ₩ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Notes and other explanatory information [abstract] | ||
| Discount rate Increased by 1% | ₩ (119,694) | ₩ (55,066) |
| Discount rate Decreased by 1% | 138,208 | 66,463 |
| Future salary growth Increased by 1% | 137,766 | 66,204 |
| Future salary growth Decreased by 1% | ₩ (121,689) | ₩ (55,864) |