Employee benefits (Details 6) - KRW (₩) ₩ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Notes and other explanatory information [abstract] | |||
| Cost of revenues | ₩ 7,341,369 | ₩ 7,280,355 | ₩ 9,290,041 |
| Selling, general and administrative expenses | 7,088,603 | 2,268,847 | 2,487,835 |
| Total | ₩ 14,429,972 | ₩ 9,549,202 | ₩ 11,777,876 |