Capital and other components of equity (Details) - KRW (₩) |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Entity Information [Line Items] | |||
| Number of authorized shares | 50,000 | 50,000 | 50,000 |
| Value per share | ₩ 1 | ₩ 1 | ₩ 1 |
| Number of shares issued | 50,000 | 50,000 | 50,000 |
| Common shares | ₩ 50,000 | ₩ 50,000 | ₩ 50,000 |
| CubeBio Co., Ltd. [Member] | |||
| Entity Information [Line Items] | |||
| Number of authorized shares | 1,000,000,000 | 1,000,000,000 | 1,000,000,000 |
| Value per share | ₩ 500 | ₩ 500 | ₩ 500 |
| Number of shares issued | 52,815,475 | 52,815,475 | 52,294,475 |
| Common shares | ₩ 26,407,737,500 | ₩ 26,407,737,500 | ₩ 26,147,237,500 |