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Commitments and Contingent Liabilities - Additional Information (Details) ₩ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 KRW (₩) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 KRW (₩)
Disclosure Of Contingent Liabilities [Line Items] |  |  |
Right to develop and distribute games period | 5 years |  |
Purchase obligations | ₩ | ₩ 3,310 |  | ₩ 868
Kookmin Bank |  |  |
Disclosure Of Contingent Liabilities [Line Items] |  |  |
Payment guarantees receivable | $ |  | $ 912,000 |
Bottom of Range |  |  |
Disclosure Of Contingent Liabilities [Line Items] |  |  |
Percentage of commitments | 20.00% |  |
Top of Range |  |  |
Disclosure Of Contingent Liabilities [Line Items] |  |  |
Percentage of commitments | 40.00% |  |

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- Definition Payment guarantees receivable. + References No definition available. + Details
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- Definition Percentage of commitments. + References No definition available. + Details
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- Definition Purchase obligations. + References No definition available. + Details
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- Details
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