v3.26.1
Share-based payment arrangements (Details 2) - Share appreciation rights (cash-settled) [Member]
₩ / shares in Units, ₩ in Thousands
12 Months Ended
Dec. 31, 2025
KRW (₩)
₩ / shares
Dec. 31, 2025
KRW (₩)
$ / shares
Dec. 31, 2024
KRW (₩)
₩ / shares
Dec. 31, 2024
KRW (₩)
$ / shares
IfrsStatementLineItems [Line Items]        
Fair value of option ₩ 7,540 ₩ 7,540 ₩ 54,230 ₩ 54,230
Share price | (per share) ₩ 410,136 ₩ 0.41 ₩ 643,735
Exercise price ₩ 1,100,000   ₩ 1,100,000  
Risk- free interest rate (based on government bonds) 2.98%   2.71%  
Volatility [1] 35.50%   30.00%  
[1] Volatility has been based on an evaluation of the historical volatility of other companies’ share price, which are listed in KOSDAQ, particularly over the historical period commensurate with prior one year.