Trade and other receivables (Details) - KRW (₩) ₩ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Trade And Other Receivables | ||
| Accounts receivable — Trade | ₩ 5,112,044 | ₩ 9,945,757 |
| Allowance for doubtful accounts (Accounts receivable) | (731,158) | (735,316) |
| Accounts receivable — trade, net | 4,380,886 | 9,210,441 |
| Accrued income | 138,591 | 74,233 |
| Allowance for doubtful accounts (Accrued income) | (39,151) | (44,104) |
| Non-trade receivables | 936,694 | 600,352 |
| Allowance for doubtful accounts (Non-trade receivables) | (500,000) | (500,000) |
| Accounts receivable — other, net | ₩ 536,134 | ₩ 130,482 |