Shareholders' equity - Narrative (Details) - ₩ / shares |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Share Capital, Reserves And Other Equity Interest [Abstract] | ||||
| Number of shares authorized (in shares) | 200,000,000 | 200,000,000 | ||
| Number of shares issued (in shares) | 2,477,672 | 2,477,672 | ||
| Number of shares outstanding (in shares) | 2,477,672 | 2,477,672 | 2,477,672 | 2,477,672 |
| Par value per share (in KRW per share) | ₩ 10,000 | ₩ 10,000 |
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- Definition Share Capital, Reserves And Other Equity Interest [Abstract] No definition available.
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- Definition The number of shares authorised. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The number of shares issued by the entity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The nominal value per share. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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