<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>639</ContextCount>
  <ElementCount>415</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>149</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>15</UnitCount>
  <MyReports>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CONSOLIDATEDSTATEMENTSOFFINANCIALPOSITION</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF FINANCIAL POSITION</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952153 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CONSOLIDATEDSTATEMENTSOFCHANGESINEQUITY</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952154 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952155 - Disclosure - General Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/GeneralInformation</Role>
      <ShortName>General Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952156 - Disclosure - Basis of Accounting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/BasisofAccounting</Role>
      <ShortName>Basis of Accounting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952157 - Disclosure - New Standards and Interpretations Adopted During the Year and Resulting Changes in Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/NewStandardsandInterpretationsAdoptedDuringtheYearandResultingChangesinAccountingPolicies</Role>
      <ShortName>New Standards and Interpretations Adopted During the Year and Resulting Changes in Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - Material Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/MaterialAccountingPolicies</Role>
      <ShortName>Material Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - Cash and Cash Equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CashandCashEquivalents</Role>
      <ShortName>Cash and Cash Equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Financial Instruments by Category</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialInstrumentsbyCategory</Role>
      <ShortName>Financial Instruments by Category</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Accounts and Other Receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/AccountsandOtherReceivables</Role>
      <ShortName>Accounts and Other Receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Property and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/PropertyandEquipment</Role>
      <ShortName>Property and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IntangibleAssets</Role>
      <ShortName>Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Other Non-Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherNonCurrentAssets</Role>
      <ShortName>Other Non-Current Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Employee Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/EmployeeBenefits</Role>
      <ShortName>Employee Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Capital</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/Capital</Role>
      <ShortName>Capital</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Revenue from Contracts with Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomers</Role>
      <ShortName>Revenue from Contracts with Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Classification of Expenses By Nature</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/ClassificationofExpensesByNature</Role>
      <ShortName>Classification of Expenses By Nature</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Selling, General and Administrative Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SellingGeneralandAdministrativeExpenses</Role>
      <ShortName>Selling, General and Administrative Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Other Income and Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherIncomeandExpenses</Role>
      <ShortName>Other Income and Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Finance Income And Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinanceIncomeAndCosts</Role>
      <ShortName>Finance Income And Costs</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Income Tax Expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpense</Role>
      <ShortName>Income Tax Expense</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - Earnings per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/EarningsperShare</Role>
      <ShortName>Earnings per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/StatementsofCashFlows</Role>
      <ShortName>Statements of Cash Flows</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - Lease</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/Lease</Role>
      <ShortName>Lease</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9952177 - Disclosure - Financial Risk Management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagement</Role>
      <ShortName>Financial Risk Management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9952178 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9952179 - Disclosure - Transactions with Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/TransactionswithRelatedParties</Role>
      <ShortName>Transactions with Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Material Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/MaterialAccountingPoliciesPolicies</Role>
      <ShortName>Material Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/BasisofAccounting</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - General Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/GeneralInformationTables</Role>
      <ShortName>General Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/GeneralInformation</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Material Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/MaterialAccountingPoliciesTables</Role>
      <ShortName>Material Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/MaterialAccountingPolicies</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Cash and Cash Equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CashandCashEquivalentsTables</Role>
      <ShortName>Cash and Cash Equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/CashandCashEquivalents</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Financial Instruments by Category (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialInstrumentsbyCategoryTables</Role>
      <ShortName>Financial Instruments by Category (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/FinancialInstrumentsbyCategory</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Accounts and Other Receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/AccountsandOtherReceivablesTables</Role>
      <ShortName>Accounts and Other Receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/AccountsandOtherReceivables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Property and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/PropertyandEquipmentTables</Role>
      <ShortName>Property and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/PropertyandEquipment</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IntangibleAssetsTables</Role>
      <ShortName>Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/IntangibleAssets</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Other Non-Current Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherNonCurrentAssetsTables</Role>
      <ShortName>Other Non-Current Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/OtherNonCurrentAssets</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Capital (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CapitalTables</Role>
      <ShortName>Capital (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/Capital</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersTables</Role>
      <ShortName>Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/RevenuefromContractswithCustomers</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Classification of Expenses By Nature (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/ClassificationofExpensesByNatureTables</Role>
      <ShortName>Classification of Expenses By Nature (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/ClassificationofExpensesByNature</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Selling, General and Administrative Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SellingGeneralandAdministrativeExpensesTables</Role>
      <ShortName>Selling, General and Administrative Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/SellingGeneralandAdministrativeExpenses</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Other Income and Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherIncomeandExpensesTables</Role>
      <ShortName>Other Income and Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/OtherIncomeandExpenses</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Finance Income And Costs (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinanceIncomeAndCostsTables</Role>
      <ShortName>Finance Income And Costs (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/FinanceIncomeAndCosts</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Income Tax Expense (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseTables</Role>
      <ShortName>Income Tax Expense (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/IncomeTaxExpense</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Earnings per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/EarningsperShareTables</Role>
      <ShortName>Earnings per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/EarningsperShare</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Statements of Cash Flows (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/StatementsofCashFlowsTables</Role>
      <ShortName>Statements of Cash Flows (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/StatementsofCashFlows</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Lease (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/LeaseTables</Role>
      <ShortName>Lease (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/Lease</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Financial Risk Management (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementTables</Role>
      <ShortName>Financial Risk Management (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/FinancialRiskManagement</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/SegmentInformation</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Transactions with Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/TransactionswithRelatedPartiesTables</Role>
      <ShortName>Transactions with Related Parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.gravity.co.kr/role/TransactionswithRelatedParties</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - General Information - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/GeneralInformationAdditionalInformationDetails</Role>
      <ShortName>General Information - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - General Information - Schedule of Major Shareholders and their Respective Percentage of Ownership (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/GeneralInformationScheduleofMajorShareholdersandtheirRespectivePercentageofOwnershipDetails</Role>
      <ShortName>General Information - Schedule of Major Shareholders and their Respective Percentage of Ownership (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - General Information - Schedule of Consolidated Subsidiaries (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/GeneralInformationScheduleofConsolidatedSubsidiariesDetails</Role>
      <ShortName>General Information - Schedule of Consolidated Subsidiaries (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - General Information - Schedule of Consolidated Financial Information Subsidiaries (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/GeneralInformationScheduleofConsolidatedFinancialInformationSubsidiariesDetails</Role>
      <ShortName>General Information - Schedule of Consolidated Financial Information Subsidiaries (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Material Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/MaterialAccountingPoliciesScheduleofPropertyandEquipmentEstimatedUsefulLivesDetails</Role>
      <ShortName>Material Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Material Accounting Policies - Schedule of Useful Lives of Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/MaterialAccountingPoliciesScheduleofUsefulLivesofIntangibleAssetsDetails</Role>
      <ShortName>Material Accounting Policies - Schedule of Useful Lives of Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CashandCashEquivalentsScheduleofCashandCashEquivalentsDetails</Role>
      <ShortName>Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Cash and Cash Equivalents - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CashandCashEquivalentsAdditionalInformationDetails</Role>
      <ShortName>Cash and Cash Equivalents - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Financial Instruments by Category - Schedule of Carrying Amounts of Financial Instruments by Category (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialInstrumentsbyCategoryScheduleofCarryingAmountsofFinancialInstrumentsbyCategoryDetails</Role>
      <ShortName>Financial Instruments by Category - Schedule of Carrying Amounts of Financial Instruments by Category (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Financial Instruments by Category - Schedule of Net Income and Expenses From Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialInstrumentsbyCategoryScheduleofNetIncomeandExpensesFromFinancialInstrumentsDetails</Role>
      <ShortName>Financial Instruments by Category - Schedule of Net Income and Expenses From Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Financial Instruments by Category - Schedule of Financial Instruments by Fair Value Hierarchy Level (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialInstrumentsbyCategoryScheduleofFinancialInstrumentsbyFairValueHierarchyLevelDetails</Role>
      <ShortName>Financial Instruments by Category - Schedule of Financial Instruments by Fair Value Hierarchy Level (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Accounts and Other Receivables - Schedule of Accounts and Other Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/AccountsandOtherReceivablesScheduleofAccountsandOtherReceivablesDetails</Role>
      <ShortName>Accounts and Other Receivables - Schedule of Accounts and Other Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Accounts and Other Receivables - Schedule of Changes in Loss Allowance of Accounts and Other Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/AccountsandOtherReceivablesScheduleofChangesinLossAllowanceofAccountsandOtherReceivablesDetails</Role>
      <ShortName>Accounts and Other Receivables - Schedule of Changes in Loss Allowance of Accounts and Other Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Accounts and Other Receivables - Schedule of ECLs and Credit Risk Exposures for Accounts and Other Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/AccountsandOtherReceivablesScheduleofECLsandCreditRiskExposuresforAccountsandOtherReceivablesDetails</Role>
      <ShortName>Accounts and Other Receivables - Schedule of ECLs and Credit Risk Exposures for Accounts and Other Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Property and Equipment - Schedule of Property Plant and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/PropertyandEquipmentScheduleofPropertyPlantandEquipmentDetails</Role>
      <ShortName>Property and Equipment - Schedule of Property Plant and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Property and Equipment - Schedule of Change in Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/PropertyandEquipmentScheduleofChangeinPropertyandEquipmentDetails</Role>
      <ShortName>Property and Equipment - Schedule of Change in Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Property and Equipment - Schedule of Classification of Depreciation Expenses in Statements of Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/PropertyandEquipmentScheduleofClassificationofDepreciationExpensesinStatementsofComprehensiveIncomeDetails</Role>
      <ShortName>Property and Equipment - Schedule of Classification of Depreciation Expenses in Statements of Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Property and Equipment - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/PropertyandEquipmentAdditionalInformationDetails</Role>
      <ShortName>Property and Equipment - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Intangible Assets - Schedule of Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IntangibleAssetsScheduleofIntangibleAssetsDetails</Role>
      <ShortName>Intangible Assets - Schedule of Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Intangible Assets - Schedule of Changes in Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IntangibleAssetsScheduleofChangesinIntangibleAssetsDetails</Role>
      <ShortName>Intangible Assets - Schedule of Changes in Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Intangible Assets - Schedule of Changes in Intangible Assets (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IntangibleAssetsScheduleofChangesinIntangibleAssetsParentheticalDetails</Role>
      <ShortName>Intangible Assets - Schedule of Changes in Intangible Assets (Parenthetical) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Intangible Assets - Schedule of Classification of Amortization in Statements of Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IntangibleAssetsScheduleofClassificationofAmortizationinStatementsofComprehensiveIncomeDetails</Role>
      <ShortName>Intangible Assets - Schedule of Classification of Amortization in Statements of Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Other Non-Current Assets - Schedule of Non-Current Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherNonCurrentAssetsScheduleofNonCurrentAssetsDetails</Role>
      <ShortName>Other Non-Current Assets - Schedule of Non-Current Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Employee Benefits - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/EmployeeBenefitsAdditionalInformationDetails</Role>
      <ShortName>Employee Benefits - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Commitments and Contingencies - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CommitmentsandContingenciesAdditionalInformationDetails</Role>
      <ShortName>Commitments and Contingencies - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Capital - Schedule of Common Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CapitalScheduleofCommonSharesDetails</Role>
      <ShortName>Capital - Schedule of Common Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Capital - Schedule of Capital Surplus (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CapitalScheduleofCapitalSurplusDetails</Role>
      <ShortName>Capital - Schedule of Capital Surplus (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Capital - Schedule of Other Components of Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CapitalScheduleofOtherComponentsofEquityDetails</Role>
      <ShortName>Capital - Schedule of Other Components of Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Capital - Schedule of Retained Earnings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CapitalScheduleofRetainedEarningsDetails</Role>
      <ShortName>Capital - Schedule of Retained Earnings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - Capital - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/CapitalAdditionalInformationDetails</Role>
      <ShortName>Capital - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - Revenue from Contracts with Customers - Schedule of Details of Revenue from Contracts with Customers based on Service Contract and Timing of Satisfaction of Performance Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersScheduleofDetailsofRevenuefromContractswithCustomersbasedonServiceContractandTimingofSatisfactionofPerformanceObligationsDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Schedule of Details of Revenue from Contracts with Customers based on Service Contract and Timing of Satisfaction of Performance Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - Revenue from Contracts with Customers - Schedule of Account Receivables, Incremental Costs of Obtaining a Contract, and Contract Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersScheduleofAccountReceivablesIncrementalCostsofObtainingaContractandContractLiabilitiesDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Schedule of Account Receivables, Incremental Costs of Obtaining a Contract, and Contract Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - Revenue from Contracts with Customers - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersAdditionalInformationDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - Revenue from Contracts with Customers - Schedule of Transaction Price Allocated to Unsatisfied Performance Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersScheduleofTransactionPriceAllocatedtoUnsatisfiedPerformanceObligationsDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Schedule of Transaction Price Allocated to Unsatisfied Performance Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - Revenue from Contracts with Customers - Schedule of Details of Incremental Costs of Obtaining Contract Recognized As Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersScheduleofDetailsofIncrementalCostsofObtainingContractRecognizedAsAssetsDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Schedule of Details of Incremental Costs of Obtaining Contract Recognized As Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - Revenue from Contracts with Customers - Schedule of Details of Amortization Costs Recognized as Cost of Revenues (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/RevenuefromContractswithCustomersScheduleofDetailsofAmortizationCostsRecognizedasCostofRevenuesDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Schedule of Details of Amortization Costs Recognized as Cost of Revenues (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - Classification of Expenses By Nature - Schedule of Details of Classification of Expenses By Nature (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/ClassificationofExpensesByNatureScheduleofDetailsofClassificationofExpensesByNatureDetails</Role>
      <ShortName>Classification of Expenses By Nature - Schedule of Details of Classification of Expenses By Nature (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - Selling, General and Administrative Expenses - Schedule of Selling, General and Administrative Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SellingGeneralandAdministrativeExpensesScheduleofSellingGeneralandAdministrativeExpensesDetails</Role>
      <ShortName>Selling, General and Administrative Expenses - Schedule of Selling, General and Administrative Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - Other Income and Expenses - Schedule of Details of Other Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherIncomeandExpensesScheduleofDetailsofOtherIncomeDetails</Role>
      <ShortName>Other Income and Expenses - Schedule of Details of Other Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - Other Income and Expenses - Schedule of Details of Other Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/OtherIncomeandExpensesScheduleofDetailsofOtherExpenseDetails</Role>
      <ShortName>Other Income and Expenses - Schedule of Details of Other Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - Finance Income And Costs - Schedule of Finance Income And Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinanceIncomeAndCostsScheduleofFinanceIncomeAndCostDetails</Role>
      <ShortName>Finance Income And Costs - Schedule of Finance Income And Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - Income Tax Expense - Schedule of Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseScheduleofIncomeTaxExpenseDetails</Role>
      <ShortName>Income Tax Expense - Schedule of Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - Income Tax Expense - Schedule of Differences Between Tax Expense and Amount Arise Using Statutory Tax Rate Applicable to Profits of Entities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseScheduleofDifferencesBetweenTaxExpenseandAmountAriseUsingStatutoryTaxRateApplicabletoProfitsofEntitiesDetails</Role>
      <ShortName>Income Tax Expense - Schedule of Differences Between Tax Expense and Amount Arise Using Statutory Tax Rate Applicable to Profits of Entities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - Income Tax Expense - Schedule of Changes in Deferred Income Tax Assets (Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseScheduleofChangesinDeferredIncomeTaxAssetsLiabilitiesDetails</Role>
      <ShortName>Income Tax Expense - Schedule of Changes in Deferred Income Tax Assets (Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - Income Tax Expense - Schedule of Unused Tax Loss Carryforwards and Unused Tax Credit Carryforwards Not Recognized as Deferred Income Tax Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseScheduleofUnusedTaxLossCarryforwardsandUnusedTaxCreditCarryforwardsNotRecognizedasDeferredIncomeTaxAssetsDetails</Role>
      <ShortName>Income Tax Expense - Schedule of Unused Tax Loss Carryforwards and Unused Tax Credit Carryforwards Not Recognized as Deferred Income Tax Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - Income Tax Expense - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseAdditionalInformationDetails</Role>
      <ShortName>Income Tax Expense - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - Income Tax Expense - Schedule of Gross Deferred Tax Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/IncomeTaxExpenseScheduleofGrossDeferredTaxBalancesDetails</Role>
      <ShortName>Income Tax Expense - Schedule of Gross Deferred Tax Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - Earnings per Share - Schedule of Components of Basic Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/EarningsperShareScheduleofComponentsofBasicEarningsPerShareDetails</Role>
      <ShortName>Earnings per Share - Schedule of Components of Basic Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - Earnings per Share - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/EarningsperShareAdditionalInformationDetails</Role>
      <ShortName>Earnings per Share - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - Statements of Cash Flows - Schedule of Cash Generated From Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/StatementsofCashFlowsScheduleofCashGeneratedFromOperationsDetails</Role>
      <ShortName>Statements of Cash Flows - Schedule of Cash Generated From Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - Statements of Cash Flows - Schedule of Significant Non-cash Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/StatementsofCashFlowsScheduleofSignificantNoncashTransactionsDetails</Role>
      <ShortName>Statements of Cash Flows - Schedule of Significant Non-cash Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - Statements of Cash Flows - Schedule of Changes in Liabilities Arising From Financing Activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/StatementsofCashFlowsScheduleofChangesinLiabilitiesArisingFromFinancingActivitiesDetails</Role>
      <ShortName>Statements of Cash Flows - Schedule of Changes in Liabilities Arising From Financing Activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - Lease - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/LeaseAdditionalInformationDetails</Role>
      <ShortName>Lease - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - Lease - Schedule of Amounts Relating to Leases in Consolidated Statements of Financial Position (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/LeaseScheduleofAmountsRelatingtoLeasesinConsolidatedStatementsofFinancialPositionDetails</Role>
      <ShortName>Lease - Schedule of Amounts Relating to Leases in Consolidated Statements of Financial Position (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - Lease - Schedule of Changes in Right-of-Use Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/LeaseScheduleofChangesinRightofUseAssetsDetails</Role>
      <ShortName>Lease - Schedule of Changes in Right-of-Use Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - Lease - Schedule of Amounts Recognized in Consolidated Statements of Profit or Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/LeaseScheduleofAmountsRecognizedinConsolidatedStatementsofProfitorLossDetails</Role>
      <ShortName>Lease - Schedule of Amounts Recognized in Consolidated Statements of Profit or Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - Lease - Schedule of Amounts Relating to Leases in Consolidated Statements of Profit or Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/LeaseScheduleofAmountsRelatingtoLeasesinConsolidatedStatementsofProfitorLossDetails</Role>
      <ShortName>Lease - Schedule of Amounts Relating to Leases in Consolidated Statements of Profit or Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - Financial Risk Management - Schedule of Company's Debt to Equity Ratio (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementScheduleofCompanysDebttoEquityRatioDetails</Role>
      <ShortName>Financial Risk Management - Schedule of Company's Debt to Equity Ratio (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9955591 - Disclosure - Financial Risk Management - Schedule of Financial Assets and Liabilities Exposed in Foreign Currency Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementScheduleofFinancialAssetsandLiabilitiesExposedinForeignCurrencyRiskDetails</Role>
      <ShortName>Financial Risk Management - Schedule of Financial Assets and Liabilities Exposed in Foreign Currency Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>9955592 - Disclosure - Financial Risk Management - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementAdditionalInformationDetails</Role>
      <ShortName>Financial Risk Management - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>9955593 - Disclosure - Financial Risk Management - Schedule of Impact of Fluctuation in Foreign Currency Exchange Rates on Group's Profit Before Income Tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementScheduleofImpactofFluctuationinForeignCurrencyExchangeRatesonGroupsProfitBeforeIncomeTaxDetails</Role>
      <ShortName>Financial Risk Management - Schedule of Impact of Fluctuation in Foreign Currency Exchange Rates on Group's Profit Before Income Tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>9955594 - Disclosure - Financial Risk Management - Schedule of Maximum Exposure to Credit Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementScheduleofMaximumExposuretoCreditRiskDetails</Role>
      <ShortName>Financial Risk Management - Schedule of Maximum Exposure to Credit Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>9955595 - Disclosure - Financial Risk Management - Schedule of Financial Liabilities by Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/FinancialRiskManagementScheduleofFinancialLiabilitiesbyMaturityDetails</Role>
      <ShortName>Financial Risk Management - Schedule of Financial Liabilities by Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>9955596 - Disclosure - Segment Information - Schedule of Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SegmentInformationScheduleofSegmentInformationDetails</Role>
      <ShortName>Segment Information - Schedule of Segment Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>9955597 - Disclosure - Segment Information - Schedule Revenue from External Customers by Country (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SegmentInformationScheduleRevenuefromExternalCustomersbyCountryDetails</Role>
      <ShortName>Segment Information - Schedule Revenue from External Customers by Country (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>9955598 - Disclosure - Segment Information - Schedule of Non-Current Assets by Geographical Regions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/SegmentInformationScheduleofNonCurrentAssetsbyGeographicalRegionsDetails</Role>
      <ShortName>Segment Information - Schedule of Non-Current Assets by Geographical Regions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>9955599 - Disclosure - Transactions with Related Parties - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/TransactionswithRelatedPartiesAdditionalInformationDetails</Role>
      <ShortName>Transactions with Related Parties - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>122</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>9955600 - Disclosure - Transactions with Related Parties - Schedule of Account Balances with Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/TransactionswithRelatedPartiesScheduleofAccountBalanceswithRelatedPartiesDetails</Role>
      <ShortName>Transactions with Related Parties - Schedule of Account Balances with Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>123</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>9955601 - Disclosure - Transactions with Related Parties - Schedule of Transactions with Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/TransactionswithRelatedPartiesScheduleofTransactionswithRelatedPartiesDetails</Role>
      <ShortName>Transactions with Related Parties - Schedule of Transactions with Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>124</Position>
    </Report>
    <Report instance="grvy-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>9955602 - Disclosure - Transactions with Related Parties - Schedule of Key Management Personnel Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.gravity.co.kr/role/TransactionswithRelatedPartiesScheduleofKeyManagementPersonnelCompensationDetails</Role>
      <ShortName>Transactions with Related Parties - Schedule of Key Management Personnel Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>125</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="20-F" isDefinitelyFs="true" isIfrs="true" isUsgaap="true" original="grvy-20251231.htm">grvy-20251231.htm</File>
    <File>grvy-20251231.xsd</File>
    <File>grvy-20251231_cal.xml</File>
    <File>grvy-20251231_def.xml</File>
    <File>grvy-20251231_lab.xml</File>
    <File>grvy-20251231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>grvy-20251231_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="46">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="1">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
    <BaseTaxonomy items="1758">https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
