Financial Instruments - Fair values and risk management (Details 8) - KRW (₩) ₩ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Notes and other explanatory information [abstract] | ||
| Interest increased by 100 bp | ₩ 42,750 | ₩ 5,070 |
| Interest decreased by 100 bp | ₩ (42,750) | ₩ (5,070) |