v3.26.1
Income taxes (Details 1) - KRW (₩)
₩ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Taxes      
Remeasurements of defined benefit liability Before tax ₩ 309,013 ₩ 44,085 ₩ 109,558
Remeasurements of defined benefit liability Tax (expense) benefit (794)
Remeasurements of defined benefit liability Net of tax ₩ 308,219 ₩ 44,085 ₩ 109,558