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Commitments and Contingent Liabilities - Additional Information (Details) ₩ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 KRW (₩) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 KRW (₩)
Disclosure of contingent liabilities [line items] |  |  |
Purchase obligations | ₩ 2,335 |  | ₩ 3,310
Kookmin Bank |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Amount of payment guarantee | $ |  | $ 818,000 |
Seoul Guarantee Insurance Co. Ltd. |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Amount of payment guarantee | ₩ 1,818 |  |
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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Namespace Prefix: | grvy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Percentage of commitments. + References No definition available. + Details
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Balance Type: | na
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- Definition Purchase obligations. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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