GRAVITY CO., LTD. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 100000 - Document - Document and Entity Information Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DocumentDocumentAndEntityInformation
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3 Document And Entity Information [Abstract] Abstract grvy:DocumentAndEntityInformationAbstract
4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
14 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
15 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
16 Entity Shell Company Concept (Yes/No) For Period dei:EntityShellCompany
17 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
18 Entity Voluntary Filers Concept (Yes/No) For Period dei:EntityVoluntaryFilers
19 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
20 100010 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFFINANCIALPOSITION
21 Implied Table Table

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22 Statement Of Financial Position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
23 Assets Abstract ifrs-full:AssetsAbstract
24 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
25 Short-term financial instruments Concept (Monetary) As Of Debit grvy:ShortTermFinancialInstruments
26 Accounts receivables, net Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
27 Other receivables, net Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
28 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
29 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
30 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
31 Property and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
32 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
33 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
34 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
35 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentAssets
36 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
37 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
38 Liabilities Abstract ifrs-full:LiabilitiesAbstract
39 Accounts payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
40 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
41 Withholdings Concept (Monetary) As Of Credit grvy:CurrentWithholdingsAmount
42 Accrued expenses Concept (Monetary) As Of Credit ifrs-full:AccrualsClassifiedAsCurrent
43 Income tax payable Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
44 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
45 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
46 Long-term deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
47 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentLiabilities
48 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
49 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
50 Equity Abstract ifrs-full:EquityAbstract
51 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
52 Capital surplus Concept (Monetary) As Of Credit ifrs-full:CapitalReserve
53 Other components of equity Concept (Monetary) As Of Credit ifrs-full:OtherEquityInterest
54 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
55 Equity attributable to owners of the Parent Company Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
56 Non-controlling interest Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
57 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
58 Total liabilities and equity Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
59 100020 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME
60 Implied Table Table

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61 Statement Of Comprehensive Income [Abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
62 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
63 Online games—subscription revenue Concept (Monetary) For Period Credit grvy:OnlineGamesSubscriptionRevenue
64 Online games—royalties and license fees Concept (Monetary) For Period Credit grvy:RevenueFromRoyaltiesAndLicenceFeeIncome
65 Mobile games and applications Concept (Monetary) For Period Credit grvy:RevenueFromMobileGamesAndApplications
66 Character merchandising, animation and other revenue Concept (Monetary) For Period Credit grvy:CharacterMerchandisingAnimationAndOtherRevenue
67 Cost of revenues Concept (Monetary) For Period Debit ifrs-full:CostOfSales
68 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
69 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
70 Research and development Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
71 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
72 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByFunction
73 Operating profit Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
74 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
75 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
76 Profit before income tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
77 Income tax expenses Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
78 Profit for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
79 Other comprehensive income (loss) Abstract ifrs-full:OtherComprehensiveIncomeAbstract
80 Items that may be subsequently reclassified to income or loss Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
81 Foreign currency translation adjustments Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
82 Total comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
83 Profit (loss) attributable to: Abstract ifrs-full:ProfitLossAttributableToAbstract
84 Owners of the Parent Company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
85 Non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
86 Total comprehensive income attributable to: Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
87 Owners of the Parent Company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
88 Non-controlling interest Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
89 Earnings per share (in Korean won) Abstract ifrs-full:EarningsPerShareAbstract
90 Basic earnings per share Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
91 Diluted earnings per share Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
92 100030 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINEQUITY
93 Statement [Table] Table

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 us-gaap:StatementTable
94 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
95 Equity [member] Member ifrs-full:EquityMember
96 Share Capital Member ifrs-full:IssuedCapitalMember
97 Capital Surplus Member grvy:CapitalSurplusMember
98 Other Components of Equity Member grvy:OtherComponentsOfEquityMember
99 Retained Earnings (Accumulated Deficit) Member ifrs-full:RetainedEarningsMember
100 Attributable to Owners of the Parent Company Total Member ifrs-full:EquityAttributableToOwnersOfParentMember
101 Non-Controlling Interest Member ifrs-full:NoncontrollingInterestsMember
102 Statement [Line Items] LineItems us-gaap:StatementLineItems
103 Beginning Balance Concept (Monetary) As Of Credit ifrs-full:Equity
104 Total comprehensive income (loss) for the year Abstract ifrs-full:ComprehensiveIncomeAbstract
105 Profit (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
106 Foreign currency translation adjustments Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
107 Total comprehensive income (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
108 Transaction with owners, recognized directly in equity Abstract grvy:IncreaseDecreaseThroughTransactionsWithOwnersEquityAbstract
109 Disposition of deficit with capital surplus Concept (Monetary) For Period Debit grvy:DispositionOfDeficitWithCapitalSurplus
110 Equity transaction within consolidation scope Concept (Monetary) For Period Credit grvy:EquityTransactionWithinConsolidationScope
111 Ending Balance Concept (Monetary) As Of Credit ifrs-full:Equity
112 100040 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS
113 Implied Table Table

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114 Statement Of Cash Flows [Abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
115 Cash flows from operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
116 Cash generated from operations Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperations
117 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
118 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
119 Net cash inflow from operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
120 Cash flows from investing activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
121 Proceeds from lease deposits Concept (Monetary) For Period Debit grvy:ProceedsFromLeaseDeposits
122 Proceeds from short-term loans Concept (Monetary) For Period Debit grvy:ProceedsFromShortTermLoans
123 Proceeds from disposal of property and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
124 Decrease(Increase) in short-term financial instruments, net Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments
125 Payment of lease deposits Concept (Monetary) For Period Credit ifrs-full:CashOutflowForLeases
126 Purchase of property and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
127 Purchase of other intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
128 Net cash inflow(outflow) in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
129 Cash flows from financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
130 Repayment of lease liabilities Concept (Monetary) For Period Credit ifrs-full:PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities
131 Net cash outflow in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
132 Effect of exchange rate changes on cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
133 Net increase (decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
134 Cash and cash equivalents at beginning of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
135 Cash and cash equivalents at end of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
136 100050 - Disclosure - General Information Network

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138 General Information [Abstract] Abstract grvy:GeneralInformationAbstract
139 General Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
140 100060 - Disclosure - Significant Accounting Policies Network

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141 Implied Table Table

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142 Disclosure Of Significant Accounting Policies [Abstract] Abstract grvy:DisclosureOfSignificantAccountingPoliciesAbstract
143 Significant Accounting Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
144 100070 - Disclosure - Critical Accounting Estimates and Assumptions Network

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145 Implied Table Table

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146 Disclosure Of Changes In Accounting Estimates [Abstract] Abstract ifrs-full:DisclosureOfChangesInAccountingEstimatesAbstract
147 Critical Accounting Estimates and Assumptions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
148 100080 - Disclosure - Cash and Cash Equivalents Network

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149 Implied Table Table

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150 Cash And Cash Equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
151 Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
152 100090 - Disclosure - Financial instruments Network

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153 Implied Table Table

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154 Disclosure Of Financial Instruments [Abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
155 Financial instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
156 100100 - Disclosure - Accounts and Other Receivables Network

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157 Implied Table Table

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158 Trade And Other Receivables [Abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
159 Accounts and Other Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
160 100110 - Disclosure - Property and Equipment Network

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161 Implied Table Table

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162 Property Plant And Equipment [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
163 Property and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
164 100120 - Disclosure - Intangible Assets Network

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165 Implied Table Table

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166 Disclosure Of Intangible Assets [Abstract] Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
167 Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
168 100130 - Disclosure - Retirement Benefits Network

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169 Implied Table Table

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170 Disclosure Of Defined Benefit Plans [Abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
171 Retirement Benefits Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
172 100140 - Disclosure - Commitments and Contingent Liabilities Network

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173 Implied Table Table

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174 Disclosure Of Commitments And Contingent Liabilities [Abstract] Abstract grvy:DisclosureOfCommitmentsAndContingentLiabilitiesAbstract
175 Commitments and Contingent Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
176 100150 - Disclosure - Assets and Liabilities Related to Contracts with Customers Network

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177 Implied Table Table

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178 Contract Assets And Contract Liabilities [Abstract] Abstract grvy:ContractAssetsAndContractLiabilitiesAbstract
179 Assets and Liabilities Related to Contracts with Customers Concept (Text Block (HTML)) For Period grvy:DisclosureOfContractAssetsAndContractLiabilitiesExplanatory
180 100160 - Disclosure - Capital Network

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181 Implied Table Table

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182 Disclosure Of Classes Of Share Capital [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
183 Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
184 100170 - Disclosure - Classification of Expenses By Nature Network

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185 Implied Table Table

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186 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
187 Classification of Expenses By Nature Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesExplanatory
188 100180 - Disclosure - Selling, General and Administrative Expenses Network

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189 Implied Table Table

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190 Selling General And Administrative Expense [Abstract] Abstract ifrs-full:SellingGeneralAndAdministrativeExpenseAbstract
191 Selling, General and Administrative Expenses Concept (Text Block (HTML)) For Period grvy:DisclosureOfGeneralSellingAndAdministrativeExpenseExplanatory
192 100190 - Disclosure - Other Income and Expenses Network

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193 Implied Table Table

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194 Other Income And Expense [Abstract] Abstract grvy:OtherIncomeAndExpenseAbstract
195 Other Income and Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExpenseExplanatory
196 100200 - Disclosure - Finance Income And Costs Network

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197 Implied Table Table

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198 Disclosure Of Finance Income And Costs [Abstract] Abstract grvy:DisclosureOfFinanceIncomeAndCostsAbstract
199 Finance Income and Costs Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
200 100210 - Disclosure - Income Taxes Network

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201 Implied Table Table

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202 Major Components Of Tax Expense Income [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
203 Income Taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
204 100220 - Disclosure - Earnings Per Share Network

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205 Implied Table Table

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206 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
207 Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
208 100230 - Disclosure - Statements of Cash Flows Network

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209 Implied Table Table

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210 Disclosure Of Cash Flow Statement [Abstract] Abstract grvy:DisclosureOfCashFlowStatementAbstract
211 Statements of Cash Flows Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
212 100240 - Disclosure - Financial Risk Management Network

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213 Implied Table Table

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214 Disclosure Of Financial Instruments [Abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
215 Financial Risk Management Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
216 100250 - Disclosure - Segment Information Network

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217 Implied Table Table

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218 Disclosure Of Operating Segments [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
219 Segment information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
220 100260 - Disclosure - Transactions with Related Parties Network

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221 Implied Table Table

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222 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
223 Transactions with Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
224 100270 - Disclosure - Subsequent Events Network

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225 Implied Table Table

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226 Subsequent Event [Abstract] Abstract grvy:SubsequentEventAbstract
227 Subsequent Events Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
228 100280 - Disclosure - Significant Accounting Policies (Policies) Network

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229 Implied Table Table

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230 Disclosure Of Significant Accounting Policies [Abstract] Abstract grvy:DisclosureOfSignificantAccountingPoliciesAbstract
231 Basis of Presentation Concept (Text Block (HTML)) For Period grvy:DescriptionOfAccountingPolicyForBasisOfPresentationExplanatory
232 Changes in Accounting Policies and Disclosures Concept (Text Block (HTML)) For Period grvy:DescriptionOfAccountingPolicyForChangeInAccountingPolicyAndDisclosuresExplanatory
233 Consolidation Concept (Text Block (HTML)) For Period grvy:DescriptionOfAccountingPolicyForConsolidationExplanatory
234 Foreign Currency Translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
235 Finance Income and Finance Costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory
236 Segment Reporting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
237 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
238 Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory
239 Property and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
240 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory
241 Royalties and licenses Concept (Text Block (HTML)) For Period grvy:DescriptionOfAccountingPolicyForRoyaltiesAndLicensesExplanatory
242 Impairment of Non-financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
243 Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory
244 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
245 Current and Deferred Tax Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
246 Employee Benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
247 Revenue Recognition Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
248 Cost deferral Concept (Text Block (HTML)) For Period grvy:DescriptionOfAccountingPolicyForCostDeferralExplanatory
249 Research and development expenses Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory
250 Lease Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
251 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
252 Approval of the Financial Statements Concept (Text Block (HTML)) For Period grvy:DescriptionOfAccountingPolicyForApprovalOfFinancialStatementsExplanatory
253 New standards and interpretations not yet adopted by the Company Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfOtherAccountingPoliciesRelevantToUnderstandingOfFinancialStatements
254 100290 - Disclosure - General Information (Tables) Network

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256 General Information [Abstract] Abstract grvy:GeneralInformationAbstract
257 Schedule of Consolidated Subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory
258 100300 - Disclosure - Significant Accounting Policies (Tables) Network

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259 Implied Table Table

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260 Disclosure Of Significant Accounting Policies [Abstract] Abstract grvy:DisclosureOfSignificantAccountingPoliciesAbstract
261 Property and Equipment Estimated Useful Lives Concept (Text Block (HTML)) For Period grvy:DisclosureOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentExplanatory
262 Summary of Useful Lives of Intangible Assets Concept (Text Block (HTML)) For Period grvy:DisclosureOfUsefulLivesOfIntangibleAssetsExplanatory
263 100310 - Disclosure - Cash and Cash Equivalents (Tables) Network

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264 Implied Table Table

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265 Cash And Cash Equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
266 Disclosure of Details of Cash and Cash Equivalents Explanatory Concept (Text Block (HTML)) For Period grvy:DisclosureOfDetailsOfCashAndCashEquivalentsExplanatory
267 Summary of Restricted Cash Included in Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRestrictedCashAndCashEquivalentsExplanatory
268 100320 - Disclosure - Financial Instruments (Tables) Network

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269 Implied Table Table

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270 Disclosure Of Financial Instruments [Abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
271 Schedule of Financial Assets and Liabilities by Category Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
272 Schedule of Net Gains or Losses by Category of Financial Instruments Concept (Text Block (HTML)) For Period grvy:DisclosureOfNetGainsOrLossesByCategoryOfFinancialInstrumentsExplanatory
273 Schedule of Carrying Amount and Fair Value of Financial Instruments Concept (Text Block (HTML)) For Period grvy:DisclosureOfCarryingAmountAndFairValueOfFinancialAssetsAndLiabilitiesExplanatory
274 Schedule of Fair Value Hierarchy of Company's Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfFinancialInstrumentsExplanatory
275 100330 - Disclosure - Accounts and Other Receivables (Tables) Network

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276 Implied Table Table

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277 Trade And Other Receivables [Abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
278 Summary of Accounts and Other Receivables Concept (Text Block (HTML)) For Period grvy:DisclosureOfSummaryOfAccountsAndOtherReceivablesExplanatory
279 Summary of Aging Analysis of Accounts and Other Receivables Concept (Text Block (HTML)) For Period grvy:DisclosureOfAgingAnalysisOfAssetsAndOtherReceivablesExplanatory
280 Summary of Changes in Allowance for Doubtful Accounts Concept (Text Block (HTML)) For Period grvy:DisclosureOfChangesInAllowanceForDoubtfulAccountsExplanatory
281 100340 - Disclosure - Property and Equipment (Tables) Network

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282 Implied Table Table

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283 Property Plant And Equipment [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
284 Summary of Property Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
285 Summary of Changes in Property and Equipment Concept (Text Block (HTML)) For Period grvy:DisclosureOfChangesInPropertyAndEquipmentExplanatory
286 Summary of Depreciation Expenses Recognized in Statements of Comprehensive Income Concept (Text Block (HTML)) For Period grvy:DisclosureOfDepreciationExpenseExplanatory
287 100350 - Disclosure - Intangible Assets (Tables) Network

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288 Implied Table Table

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289 Disclosure Of Intangible Assets [Abstract] Abstract ifrs-full:DisclosureOfIntangibleAssetsAbstract
290 Summary of Intangible Assets Concept (Text Block (HTML)) For Period grvy:DisclosureOfSummaryOfIntangibleAssetsExplanatory
291 Summary of Changes In Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
292 Summary of Amortization of Intangible Assets Concept (Text Block (HTML)) For Period grvy:DisclosureOfIntangibleAssetsAmortizationExplanatory
293 100360 - Disclosure - Commitments and Contingent Liabilities (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesTables
294 Implied Table Table

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295 Disclosure Of Commitments And Contingent Liabilities [Abstract] Abstract grvy:DisclosureOfCommitmentsAndContingentLiabilitiesAbstract
296 Summary of Future Minimum Lease Payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory
297 100370 - Disclosure - Assets and Liabilities Related to Contracts with Customers (Tables) Network

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298 Implied Table Table

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299 Contract Assets And Contract Liabilities [Abstract] Abstract grvy:ContractAssetsAndContractLiabilitiesAbstract
300 Summary of Assets and Liabilities Related to Contracts with Customers Concept (Text Block (HTML)) For Period grvy:DisclosureOfSummaryOfAssetsAndLiabilitiesRelatedToContractsWithCustomersExplanatory
301 Summary of Unsatisfied Performance Obligations Related to Contract with Customers Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPerformanceObligationsExplanatory
302 Summary of Assets Recognized from Incremental Costs of Obtaining Contract Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersExplanatory
303 100380 - Disclosure - Capital (Tables) Network

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304 Implied Table Table

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305 Disclosure Of Classes Of Share Capital [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
306 Summary of Common Shares Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
307 Summary of Capital Surplus Concept (Text Block (HTML)) For Period grvy:DisclosureOfCapitalSurplusExplanatory
308 Summary of Other Components of Equity Concept (Text Block (HTML)) For Period grvy:DisclosureOfOtherComponentsOfEquityExplanatory
309 Summary of Retained Earnings (Accumulated Deficit) Concept (Text Block (HTML)) For Period grvy:DisclosureOfRetainedEarningsExplanatory
310 100390 - Disclosure - Classification of Expenses By Nature (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureClassificationOfExpensesByNatureTables
311 Implied Table Table

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312 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
313 Summary of Expenses Classified By Nature Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesByNatureExplanatory
314 100400 - Disclosure - Selling, General and Administrative Expenses (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureSellingGeneralAndAdministrativeExpensesTables
315 Implied Table Table

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316 Selling General And Administrative Expense [Abstract] Abstract ifrs-full:SellingGeneralAndAdministrativeExpenseAbstract
317 Summary of Selling, General and Administrative Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralAndAdministrativeExpenseExplanatory
318 100410 - Disclosure - Other Income and Expenses (Tables) Network

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319 Implied Table Table

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320 Other Income And Expense [Abstract] Abstract grvy:OtherIncomeAndExpenseAbstract
321 Summary of Other Income Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory
322 Summary of Other Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingExpenseExplanatory
323 100420 - Disclosure - Finance Income And Costs (Tables) Network

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324 Implied Table Table

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325 Disclosure Of Finance Income And Costs [Abstract] Abstract grvy:DisclosureOfFinanceIncomeAndCostsAbstract
326 Summary of Finance Income and Cost Concept (Text Block (HTML)) For Period grvy:DisclosureOfDetailFinanceIncomeAndCostExplanatory
327 100430 - Disclosure - Income Taxes (Tables) Network

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328 Implied Table Table

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329 Major Components Of Tax Expense Income [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
330 Schedule of Income Tax Expense Concept (Text Block (HTML)) For Period grvy:DisclosureOfMajorComponentsOfIncomeTaxesExplanatory
331 Summary of Reconciliation Between Actual Income Tax Expense and Amount Computed by Applying Applicable Tax Rate to Profit Before Tax Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
332 Schedule of Changes in Deferred Income Tax Assets (Liabilities) Recognized in Statements of Financial Position Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
333 Schedule of Unused Tax Loss Carryforwards and Unused Tax Credit Carryforwards Not Recognized as Deferred Income Tax Assets Concept (Text Block (HTML)) For Period grvy:DisclosureOfUnusedTaxLossCarryforwardsAndUnusedTaxCreditCarryforwardsNotRecognizedAsDeferredIncomeTaxAssetsExplanatory
334 100440 - Disclosure - Earnings Per Share (Tables) Network

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335 Implied Table Table

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336 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
337 Schedule of Components of Basic Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
338 100450 - Disclosure - Statements of Cash Flows (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureStatementsOfCashFlowsTables
339 Implied Table Table

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340 Disclosure Of Cash Flow Statement [Abstract] Abstract grvy:DisclosureOfCashFlowStatementAbstract
341 Summary of Cash Generated From Operations Concept (Text Block (HTML)) For Period grvy:DisclosureOfCashGeneratedFromOperationsExplanatory
342 Summary of Significant Non-cash Transactions Concept (Text Block (HTML)) For Period grvy:DisclosureOfSignificantNonCashTransactionsExplanatory
343 100460 - Disclosure - Financial Risk Management (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementTables
344 Implied Table Table

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345 Disclosure Of Financial Instruments [Abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
346 Schedule of Company's Debt to Equity Ratio Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingExplanatory
347 Schedule of Monetary Assets and Liabilities Denominated in Foreign Currencies Concept (Text Block (HTML)) For Period grvy:DisclosureOfMonetaryAssetsAndLiabilitiesDenominatedInForeignCurrenciesExplanatory
348 Summary of Impact of Fluctuation in Foreign Currency Exchange Rates on Company's Monetary Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory
349 Summary of Maximum Exposure to Credit Risk Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCreditRiskExposureExplanatory
350 Summary of Financial Liabilities by Maturity Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfManagingLiquidityRisk
351 100470 - Disclosure - Segment Information (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureSegmentInformationTables
352 Disclosure Of Geographical Areas [Table] Table

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 ifrs-full:DisclosureOfGeographicalAreasTable
353 Segments [axis] Axis ifrs-full:SegmentsAxis
354 Segments [member] Member ifrs-full:SegmentsMember
355 Mobile Games and Applications Member grvy:MobileGamesAndApplicationsMember
356 Disclosure Of Geographical Areas [Line Items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
357 Summary Revenue from External Customers by Country Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
358 100470 - Disclosure - Segment Information (Tables) Network

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359 Implied Table Table

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360 Disclosure Of Operating Segments [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
361 Summary of Business Segments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
362 Summary Revenue from External Customers by Country Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
363 Summary of Non-Current Assets by Geographical Regions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
364 100480 - Disclosure - Transactions with Related Parties (Tables) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureTransactionsWithRelatedPartiesTables
365 Implied Table Table

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366 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
367 Summary of Major Balances of Receivables and Payables to Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
368 Summary of Compensation For Key Management Personnel Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory
369 100490 - Disclosure - General Information - Additional Information (Details) Network

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370 General Information [Table] Table

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 grvy:GeneralInformationTable
371 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
372 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
373 GungHo Online Entertainment Incorporated Member grvy:GungHoOnlineEntertainmentMember
374 General Information [Line Items] LineItems grvy:GeneralInformationLineItems
375 Number of subsidiaries Concept (Integer) For Period grvy:NumberOfSubsidiaries
376 Majority ownership interest in Gravity acquired during the period Concept (Percent) As Of grvy:EntityOwnershipInterestAcquiredByMajorityShareholder
377 100500 - Disclosure - General Information - Schedule of Consolidated Subsidiaries (Details) Network

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378 Disclosure Of Significant Investments In Subsidiaries [Table] Table

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 ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
379 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
380 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
381 NeoCyon, Inc. Member grvy:NeocyonIncorporatedMember
382 Gravity Interactive, Inc. Member grvy:GravityInteractiveIncorporatedMember
383 Gravity Games Corp. Member grvy:GravityGamesCorporationMember
384 Gravity Entertainment Corp. Member grvy:GravityEntertainmentCorporationMember
385 Gravity Communications Co.,Ltd. Member grvy:GravityCommunicationsCoLtdMember
386 Disclosure Of Significant Investments In Subsidiaries [Line Items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
387 Subsidiary Concept (Text/String) For Period ifrs-full:NameOfSubsidiary
388 Location Concept (Text/String) For Period ifrs-full:PrincipalPlaceOfBusinessOfSubsidiary
389 Ownership interest held by the Gravity (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
390 Main business Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
391 100510 - Disclosure - Significant Accounting Policies - Additional Information (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails
392 Significant Accounting Policies [Table] Table

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 grvy:SignificantAccountingPoliciesTable
393 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
394 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
395 Before discounted Member grvy:BeforeDiscountedMember
396 Discounted Member grvy:DiscountedMember
397 Significant Accounting Policies [Line Items] LineItems grvy:SignificantAccountingPoliciesLineItems
398 Transfers of financial assets Concept (Monetary) As Of Debit ifrs-full:FairValueOfTransferredFinancialAssetsThatAreNotDerecognisedInTheirEntirety
399 Common stock equivalents outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
400 Minimum operating lease payment Concept (Monetary) For Period Debit ifrs-full:MinimumOperatingLeasePayments
401 100520 - Disclosure - Significant Accounting Policies - Property and Equipment Estimated Useful Lives (Details) Network

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402 Disclosure Of Property Plant And Equipment [Table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
403 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
404 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
405 Computer and Equipment Member ifrs-full:ComputerEquipmentMember
406 Furniture and Fixtures Member ifrs-full:FixturesAndFittingsMember
407 Leasehold Improvements Member ifrs-full:LeaseholdImprovementsMember
408 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
409 Property and equipment, estimated useful lives Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
410 100530 - Disclosure - Significant Accounting Policies - Summary of Useful Lives of Intangible Assets (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfUsefulLivesOfIntangibleAssetsDetails
411 Disclosure Of Intangible Assets [Table] Table

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 ifrs-full:DisclosureOfIntangibleAssetsTable
412 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
413 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
414 Software Member ifrs-full:ComputerSoftwareMember
415 Industrial Property Rights Member ifrs-full:CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember
416 License Member ifrs-full:LicencesMember
417 Other Intangible Assets Member ifrs-full:OtherIntangibleAssetsMember
418 Range [axis] Axis ifrs-full:RangeAxis
419 Ranges [member] Member ifrs-full:RangesMember
420 Bottom of Range Member ifrs-full:BottomOfRangeMember
421 Top of Range Member ifrs-full:TopOfRangeMember
422 Disclosure Of Intangible Assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
423 Intangible assets, useful lives Concept (Text/String) For Period ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
424 100540 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfCashAndCashEquivalentsDetails
425 Implied Table Table

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426 Cash And Cash Equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
427 Deposits in banks Concept (Monetary) As Of Debit ifrs-full:BalancesWithBanks
428 Money market instruments Concept (Monetary) As Of Debit grvy:MoneyMarketInstruments
429 Total Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
430 100550 - Disclosure - Cash and Cash Equivalents - Summary of Restricted Cash Included in Cash and Cash Equivalents (Details) Network

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431 Implied Table Table

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432 Cash And Cash Equivalents [Abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
433 Credit card deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
434 100560 - Disclosure - Financial Instruments - Schedule of Financial Assets and Liabilities by Category (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialInstrumentsScheduleOfFinancialAssetsAndLiabilitiesByCategoryDetails
435 Disclosure Of Financial Assets And Liabilities [Table] Table

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 grvy:DisclosureOfFinancialAssetsAndLiabilitiesTable
436 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
437 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
438 Financial Liabilities at Amortized Cost Member ifrs-full:FinancialLiabilitiesMember
439 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
440 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
441 Financial Assets at Amortized Cost Member ifrs-full:FinancialAssetsMember
442 Disclosure Of Financial Assets And Liabilities [Line Items] LineItems grvy:DisclosureOfFinancialAssetsAndLiabilitiesLineItems
443 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
444 Short-term financial instruments Concept (Monetary) As Of Debit grvy:ShortTermFinancialInstruments
445 Accounts receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
446 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
447 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
448 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
449 Total Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
450 Accounts payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
451 Accrued expenses Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
452 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
453 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
454 Total Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
455 100570 - Disclosure - Financial Instruments - Schedule of Net Gains or Losses by Category of Financial Instruments (Details) Network

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456 Disclosure Of Financial Instruments [Table] Table

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 ifrs-full:DisclosureOfFinancialInstrumentsTable
457 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
458 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
459 Financial Liabilities at Amortized Cost Member ifrs-full:FinancialLiabilitiesAtAmortisedCostMember
460 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
461 Financial Liabilities at Amortized Cost Member ifrs-full:FinancialLiabilitiesMember
462 Foreign Currency Transactions Member grvy:ForeignCurrencyTransactionLiabilitiesMember
463 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
464 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
465 Financial Assets at Amortized Cost Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
466 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
467 Financial Assets at Amortized Cost Member ifrs-full:FinancialAssetsMember
468 Interest Income Member grvy:InterestsIncomeAssetsMember
469 Foreign Currency Transactions Member grvy:ForeignCurrencyTransactionsAssetsMember
470 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
471 Gaines(losses) on financial assets at amortized cost Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsAtAmortisedCost
472 Income(losses) on foreign currency transactions Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialLiabilitiesAtAmortisedCost
473 100580 - Disclosure - Financial Instruments - Schedule of Carrying Amount and Fair Value of Financial Instruments (Details) Network

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474 Disclosure Of Financial Instruments [Table] Table

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475 Measurement [axis] Axis ifrs-full:MeasurementAxis
476 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
477 Carrying Value Member grvy:CarryingValueMember
478 Fair Value Member ifrs-full:AtFairValueMember
479 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
480 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
481 Short-term deposits not classified as cash equivalents Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents
482 Accounts receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
483 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
484 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
485 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
486 Total Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
487 Accounts payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesToTradeSuppliers
488 Accrued expenses Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
489 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
490 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
491 Total Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
492 100590 - Disclosure - Financial Instruments - Schedule of Fair Value Hierarchy of Company's Financial Instruments (Details) Network

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493 Disclosure Of Financial Instruments [Table] Table

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494 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
495 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
496 Level 1 Member ifrs-full:Level1OfFairValueHierarchyMember
497 Level 3 Member ifrs-full:Level3OfFairValueHierarchyMember
498 Level 2 Member ifrs-full:Level2OfFairValueHierarchyMember
499 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
500 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
501 Short-term financial instruments Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents
502 100600 - Disclosure - Accounts and Other Receivables - Summary of Accounts and Other Receivables (Details) Network

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503 Trade And Other Receivables [Table] Table

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 grvy:TradeAndOtherReceivablesTable
504 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
505 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
506 Accounts Receivables Member ifrs-full:TradeReceivablesMember
507 Other Receivables Member grvy:OtherReceivablesMember
508 Trade And Other Receivables [Line Items] LineItems grvy:TradeAndOtherReceivablesLineItems
509 Non-related party Concept (Monetary) As Of Debit grvy:TradeAndOtherReceivablesDueFromNonRelatedParties
510 Related party Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties
511 Deduction : Allowance for doubtful receivables Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
512 Total Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
513 Related party Concept (Monetary) As Of Debit grvy:OtherReceivablesDueFromRelatedParties
514 Total Concept (Monetary) As Of Debit ifrs-full:OtherReceivables
515 100610 - Disclosure - Accounts and Other Receivables - Summary of Aging Analysis of Accounts and Other Receivables (Details) Network

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516 Trade And Other Receivables [Table] Table

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 grvy:TradeAndOtherReceivablesTable
517 Impairment of financial assets [axis] Axis ifrs-full:ImpairmentOfFinancialAssetsAxis
518 Entity's total for impairment of financial assets [member] Member ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember
519 Receivables Not Past Due Member ifrs-full:FinancialAssetsNeitherPastDueNorImpairedMember
520 Past Due but Not Impaired Member ifrs-full:FinancialAssetsPastDueButNotImpairedMember
521 Impaired Member ifrs-full:FinancialAssetsImpairedMember
522 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
523 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
524 Accounts Receivables Member ifrs-full:TradeReceivablesMember
525 Other Receivables Member grvy:OtherReceivablesMember
526 Trade And Other Receivables [Line Items] LineItems grvy:TradeAndOtherReceivablesLineItems
527 Total accounts and other receivables Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsThatAreIndividuallyDeterminedToBeImpairedFairValueOfCollateralHeldAndOtherCreditEnhancements
528 100620 - Disclosure - Accounts and Other Receivables - Summary of Change in Allowance for Doubtful Accounts (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureAccountsAndOtherReceivablesSummaryOfChangeInAllowanceForDoubtfulAccountsDetails
529 Trade And Other Receivables [Table] Table

*

*

 grvy:TradeAndOtherReceivablesTable
530 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
531 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
532 Accounts Receivables Member ifrs-full:TradeReceivablesMember
533 Other Receivables Member grvy:OtherReceivablesMember
534 Trade And Other Receivables [Line Items] LineItems grvy:TradeAndOtherReceivablesLineItems
535 Beginning of the year Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
536 (Reversal of) Bad debt expenses Concept (Monetary) For Period Credit grvy:BadDebtExpensesReversalAllowanceDoubtfulAccounts
537 Write-off Concept (Monetary) For Period Debit ifrs-full:UtilisationAllowanceAccountForCreditLossesOfFinancialAssets
538 End of the year Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
539 100630 - Disclosure - Property and Equipment - Summary of Property Plant and Equipment (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosurePropertyAndEquipmentSummaryOfPropertyPlantAndEquipmentDetails
540 Disclosure Of Property Plant And Equipment [Table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
541 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
542 Carrying amount [member] Member ifrs-full:CarryingAmountMember
543 Accumulated Depreciation Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
544 Acquisition Price Member ifrs-full:GrossCarryingAmountMember
545 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
546 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
547 Machinery Member ifrs-full:MachineryMember
548 Office Equipment Member ifrs-full:OfficeEquipmentMember
549 Leasehold Improvements Member ifrs-full:LeaseholdImprovementsMember
550 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
551 Property and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
552 100640 - Disclosure - Property and Equipment - Summary of Change in Property and Equipment (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosurePropertyAndEquipmentSummaryOfChangeInPropertyAndEquipmentDetails
553 Disclosure Of Property Plant And Equipment [Table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
554 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
555 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
556 Machinery Member ifrs-full:MachineryMember
557 Leasehold Improvements Member ifrs-full:LeaseholdImprovementsMember
558 Office Equipment Member ifrs-full:OfficeEquipmentMember
559 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
560 Property, plant and equipment at beginning of period Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
561 Acquisition Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
562 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
563 Disposal Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
564 Translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
565 Property, plant and equipment at end of period Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
566 100650 - Disclosure - Property and Equipment - Summary of Depreciation Expenses Recognized in Statements of Comprehensive Income (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosurePropertyAndEquipmentSummaryOfDepreciationExpensesRecognizedInStatementsOfComprehensiveIncomeDetails
567 Disclosure Of Property Plant And Equipment [Table] Table

*

*

 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
568 Income Statement Location Axis us-gaap:IncomeStatementLocationAxis
569 Income Statement Location Member us-gaap:IncomeStatementLocationDomain
570 Cost of Revenue Member us-gaap:CostOfSalesMember
571 Selling, General and Administrative Expenses Member us-gaap:SellingGeneralAndAdministrativeExpensesMember
572 Research and Development Member grvy:ResearchAndDevelopmentMember
573 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
574 Depreciation of property,plant and equipment Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
575 100660 - Disclosure - Property and Equipment - Additional Information (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosurePropertyAndEquipmentAdditionalInformationDetails
576 Implied Table Table

*

*

 implied:Table
577 Property Plant And Equipment [Abstract] Abstract ifrs-full:PropertyPlantAndEquipmentAbstract
578 Tangible assets pledged as collaterals Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
579 100670 - Disclosure - Intangible Assets - Summary of Intangible Assets (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIntangibleAssetsSummaryOfIntangibleAssetsDetails
580 Disclosure Of Intangible Assets [Table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
581 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
582 Carrying amount [member] Member ifrs-full:CarryingAmountMember
583 Acquisition Price Member ifrs-full:GrossCarryingAmountMember
584 Accumulated Amortization Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
585 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
586 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
587 Software Member ifrs-full:ComputerSoftwareMember
588 Industrial Property Rights Member grvy:IndustrialPropertyRightsMember
589 Other Intangible Assets Member grvy:OtherIntangibleAssetsIncludingLicenseMember
590 Disclosure Of Intangible Assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
591 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
592 100680 - Disclosure - Intangible Assets - Summary of Changes In Intangible Assets (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIntangibleAssetsSummaryOfChangesInIntangibleAssetsDetails
593 Disclosure Of Intangible Assets [Table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
594 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
595 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
596 Software Member ifrs-full:ComputerSoftwareMember
597 Industrial Property Rights Member grvy:IndustrialPropertyRightsMember
598 License Member ifrs-full:LicencesMember
599 Other Intangible Assets Member ifrs-full:OtherIntangibleAssetsMember
600 Disclosure Of Intangible Assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
601 Intangible assets and goodwill at beginning of period Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
602 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
603 Amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
604 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill
605 Impairment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
606 Translation differences Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill
607 Intangible assets and goodwill at end of period Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
608 100690 - Disclosure - Intangible Assets - Summary of Changes In Intangible Assets (Parenthetical) (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIntangibleAssetsSummaryOfChangesInIntangibleAssetsParentheticalDetails
609 Disclosure Of Intangible Assets [Table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
610 Segments [axis] Axis ifrs-full:SegmentsAxis
611 Segments [member] Member ifrs-full:SegmentsMember
612 Mobile Member grvy:MobileMember
613 Disclosure Of Intangible Assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
614 Impairment loss Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
615 100700 - Disclosure - Intangible Assets - Summary of Amortization of Intangible Assets (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIntangibleAssetsSummaryOfAmortizationOfIntangibleAssetsDetails
616 Disclosure Of Intangible Assets [Table] Table

*

*

 ifrs-full:DisclosureOfIntangibleAssetsTable
617 Income Statement Location Axis us-gaap:IncomeStatementLocationAxis
618 Income Statement Location Member us-gaap:IncomeStatementLocationDomain
619 Cost of Revenue Member us-gaap:CostOfSalesMember
620 Selling, General and Administrative Expenses Member us-gaap:SellingGeneralAndAdministrativeExpensesMember
621 Research and Development Member grvy:ResearchAndDevelopmentMember
622 Disclosure Of Intangible Assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
623 Amortization of intangible assets Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
624 100710 - Disclosure - Retirement Benefits - Additional Information (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureRetirementBenefitsAdditionalInformationDetails
625 Implied Table Table

*

*

 implied:Table
626 Disclosure Of Defined Benefit Plans [Abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
627 Defined contribution plan expenses Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
628 100720 - Disclosure - Commitments and Contingent Liabilities - Additional Information (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails
629 Disclosure Of Contingent Liabilities [Table] Table

*

*

 ifrs-full:DisclosureOfContingentLiabilitiesTable
630 Range [axis] Axis ifrs-full:RangeAxis
631 Ranges [member] Member ifrs-full:RangesMember
632 Bottom of Range Member ifrs-full:BottomOfRangeMember
633 Top of Range Member ifrs-full:TopOfRangeMember
634 Disclosure Of Contingent Liabilities [Line Items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
635 Number of parties with license agreement Concept (Integer) For Period grvy:NumberOfPartiesWithLicenseAgreement
636 Percentage of commitments Concept (Percent) For Period grvy:PercentageOfCommitments
637 Right to develop and distribute games period Concept (xbrli:durationItemType) For Period grvy:RightToDevelopAndDistributeGamesPeriod
638 Purchase obligations Concept (Monetary) As Of Credit grvy:PurchaseObligations
639 Operating lease expenses Concept (Monetary) For Period Debit ifrs-full:ContingentRentsRecognisedAsExpenseClassifiedAsOperatingLease
640 100730 - Disclosure - Commitments and Contingent Liabilities - Summary of Future Minimum Lease Payments (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesSummaryOfFutureMinimumLeasePaymentsDetails
641 Disclosure Of Finance Lease And Operating Lease By Lessee [Table] Table

*

*

 ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable
642 Maturity [axis] Axis ifrs-full:MaturityAxis
643 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
644 Within a Year Member ifrs-full:NotLaterThanOneYearMember
645 Over a Year and Within Three Years Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
646 Disclosure Of Finance Lease And Operating Lease By Lessee [Line Items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
647 Future minimum lease payments Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
648 100740 - Disclosure - Assets and Liabilities Related to Contracts with Customers - Summary of Contract Assets and Contract Liabilities (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureAssetsAndLiabilitiesRelatedToContractsWithCustomersSummaryOfContractAssetsAndContractLiabilitiesDetails
649 Contract Assets And Contract Liabilities [Table] Table

*

*

 grvy:ContractAssetsAndContractLiabilitiesTable
650 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
651 Financial Assets at Amortized Cost Member ifrs-full:FinancialAssetsMember
652 Incremental costs of obtaining a contract(Prepaid Expense) Member grvy:PrepaidExpenseMember
653 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
654 Products and services [member] Member ifrs-full:ProductsAndServicesMember
655 Subscription Revenue Member grvy:SubscriptionRevenueMember
656 Licensing Contract Member grvy:LicensingContractMember
657 Website.Application Development Member grvy:WebsiteApplicationDevelopmentMember
658 Contract Assets And Contract Liabilities [Abstract] Abstract grvy:ContractAssetsAndContractLiabilitiesAbstract
659 Contract Assets And Contract Liabilities Line Item Abstract grvy:ContractAssetsAndContractLiabilitiesLineItem
660 Assets Recognised From Costs To Obtain Or Fulfil Contracts With Customers Concept (Monetary) As Of Debit ifrs-full:AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
661 Contract Liabilities Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
662 100740 - Disclosure - Assets and Liabilities Related to Contracts with Customers - Summary of Contract Assets and Contract Liabilities (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureAssetsAndLiabilitiesRelatedToContractsWithCustomersSummaryOfContractAssetsAndContractLiabilitiesDetails
663 Implied Table Table

*

*

 implied:Table
664 Contract Assets And Contract Liabilities [Abstract] Abstract grvy:ContractAssetsAndContractLiabilitiesAbstract
665 Contract Assets And Contract Liabilities Line Item Abstract grvy:ContractAssetsAndContractLiabilitiesLineItem
666 Incremental costs of obtaining a contract (Prepaid Expense) Concept (Monetary) As Of Debit ifrs-full:AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
667 Contract liabilities Concept (Monetary) As Of Credit ifrs-full:ContractLiabilities
668 100750 - Disclosure - Assets and Liabilities Related to Contracts with Customers - Additional Information (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureAssetsAndLiabilitiesRelatedToContractsWithCustomersAdditionalInformationDetails
669 Implied Table Table

*

*

 implied:Table
670 Contract Assets And Contract Liabilities [Abstract] Abstract grvy:ContractAssetsAndContractLiabilitiesAbstract
671 Revenue recognized from contract liability balance at beginning of period Concept (Monetary) For Period Credit ifrs-full:RevenueThatWasIncludedInContractLiabilityBalanceAtBeginningOfPeriod
672 Percentage of contract liability balance at beginning of period recognized as revenue Concept (Percent) For Period grvy:PercentageOfContractLiabilityBalanceAtBeginningOfPeriodRecognizedAsRevenue
673 Revenue recognized related to performance obligations satisfied in prior year Concept (Monetary) For Period Credit ifrs-full:RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods
674 Percentage of transaction price allocated to contract that has not been performed Concept (Percent) For Period grvy:PercentageOfTransactionPriceAllocatedToContractThatHasNotBeenPerformed
675 Transaction price allocated to contract that has not been performed Concept (Monetary) As Of Credit grvy:TransactionPriceAllocatedToContractThatHasNotBeenPerformed
676 Transaction price allocated to remaining performance obligation that will be recognized as revenue after next fical year Concept (Monetary) As Of Credit grvy:TransactionPriceAllocatedToRemainingPerformanceObligationsThatWillBeRecognizedAsRevenueAfterNextFicalYear
677 Percentage of transaction price allocated to remaining performance obligations Concept (Percent) For Period grvy:TransactionPriceAllocatedToRemainingPerformanceObligationsPercentage
678 100760 - Disclosure - Assets and Liabilities Related to Contracts with Customers - Summary of Unsatisfied Performance Obligations Related to Contract with Customers (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureAssetsAndLiabilitiesRelatedToContractsWithCustomersSummaryOfUnsatisfiedPerformanceObligationsRelatedToContractWithCustomersDetails
679 Disclosure Of Performance Obligations [Table] Table

*

*

 ifrs-full:DisclosureOfPerformanceObligationsTable
680 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
681 Products and services [member] Member ifrs-full:ProductsAndServicesMember
682 Subscription Revenue Member grvy:SubscriptionRevenueMember
683 Licensing Contract Member grvy:LicensingContractMember
684 Website.Application Development Member grvy:WebsiteApplicationDevelopmentMember
685 Disclosure Of Performance Obligations [Line Items] LineItems ifrs-full:DisclosureOfPerformanceObligationsLineItems
686 Unsatisfied performance obligation Concept (Monetary) As Of Credit ifrs-full:TransactionPriceAllocatedToRemainingPerformanceObligations
687 100770 - Disclosure - Assets and Liabilities Related to Contracts with Customers - Summary of Assets Recognized from Incremental Costs of Obtaining Contract (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureAssetsAndLiabilitiesRelatedToContractsWithCustomersSummaryOfAssetsRecognizedFromIncrementalCostsOfObtainingContractDetails
688 Implied Table Table

*

*

 implied:Table
689 Contract Assets And Contract Liabilities [Abstract] Abstract grvy:ContractAssetsAndContractLiabilitiesAbstract
690 Incremental costs of obtaining a contract (Prepaid Expense) Concept (Monetary) As Of Debit ifrs-full:AssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomers
691 Amortization costs recognized as cost of revenue Concept (Monetary) For Period Debit ifrs-full:AmortisationAssetsRecognisedFromCostsIncurredToObtainOrFulfilContractsWithCustomers
692 100780 - Disclosure - Capital - Summary of Common Shares (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCapitalSummaryOfCommonSharesDetails
693 Disclosure Of Classes Of Share Capital [Table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
694 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
695 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
696 Common Shares Member ifrs-full:OrdinarySharesMember
697 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
698 Shares authorized Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
699 Par value Concept (Share) As Of ifrs-full:ParValuePerShare
700 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
701 Common shares Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
702 100790 - Disclosure - Capital - Summary of Capital Surplus (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCapitalSummaryOfCapitalSurplusDetails
703 Implied Table Table

*

*

 implied:Table
704 Disclosure Of Classes Of Share Capital [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
705 Additional paid in capital Concept (Monetary) As Of Credit ifrs-full:AdditionalPaidinCapital
706 Other capital surplus Concept (Monetary) As Of Credit grvy:OtherContributedCapitalSurplus
707 Total Concept (Monetary) As Of Credit ifrs-full:CapitalReserve
708 100800 - Disclosure - Capital - Summary of Other Components of Equity (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCapitalSummaryOfOtherComponentsOfEquityDetails
709 Disclosure Of Accumulated Other Comprehensive Income [Table] Table

*

*

 grvy:DisclosureOfAccumulatedOtherComprehensiveIncomeTable
710 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
711 Equity [member] Member ifrs-full:EquityMember
712 Foreign Currency Translation Adjustments Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
713 Disclosure Of Accumulated Other Comprehensive Income [Line Items] LineItems grvy:DisclosureOfAccumulatedOtherComprehensiveIncomeLineItems
714 Foreign currency translation adjustments, net of tax Concept (Monetary) As Of Credit ifrs-full:AccumulatedOtherComprehensiveIncome
715 100810 - Disclosure - Capital - Summary of Retained Earnings (Accumulated Deficit) (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCapitalSummaryOfRetainedEarningsAccumulatedDeficitDetails
716 Implied Table Table

*

*

 implied:Table
717 Subclassifications Of Assets Liabilities And Equities [Abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
718 Unappropriated retained earnings (accumulated deficit) Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
719 100820 - Disclosure - Capital - Additional Information (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureCapitalAdditionalInformationDetails
720 Disclosure Of Classes Of Share Capital [Table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
721 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
722 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
723 Preference Shares Member ifrs-full:PreferenceSharesMember
724 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
725 Number of shares reserved for issuance Concept (Shares) As Of ifrs-full:SharesReservedForIssueUnderOptionsAndContractsForSaleOfShares
726 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
727 100830 - Disclosure - Classification of Expenses By Nature - Summary of Expenses Classified By Nature (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureClassificationOfExpensesByNatureSummaryOfExpensesClassifiedByNatureDetails
728 Implied Table Table

*

*

 implied:Table
729 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
730 Advertising expenses Concept (Monetary) For Period Debit ifrs-full:AdvertisingExpense
731 Fees and commissions Concept (Monetary) For Period Debit ifrs-full:FeeAndCommissionExpense
732 Operating lease expenses Concept (Monetary) For Period Debit ifrs-full:ContingentRentsRecognisedAsExpenseClassifiedAsOperatingLease
733 Outsourcing expenses Concept (Monetary) For Period Debit grvy:OutsourcingExpenses
734 Salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
735 Expenses related to defined contribution plans Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
736 Employee benefits Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
737 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
738 Amortization Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
739 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
740 Total expenses, by nature Concept (Monetary) For Period Debit ifrs-full:ExpenseByNature
741 100840 - Disclosure - Selling, General and Administrative Expenses - Summary of Selling, General and Administrative Expenses (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureSellingGeneralAndAdministrativeExpensesSummaryOfSellingGeneralAndAdministrativeExpensesDetails
742 Disclosure Of Selling General And Administrative Expenses [Table] Table

*

*

 grvy:DisclosureOfSellingGeneralAndAdministrativeExpensesTable
743 Income Statement Location Axis us-gaap:IncomeStatementLocationAxis
744 Income Statement Location Member us-gaap:IncomeStatementLocationDomain
745 Selling, General and Administrative Expenses Member us-gaap:SellingGeneralAndAdministrativeExpensesMember
746 Disclosure Of Selling General And Administrative Expenses [Line Items] LineItems grvy:DisclosureOfSellingGeneralAndAdministrativeExpensesLineItems
747 Advertising expenses Concept (Monetary) For Period Debit ifrs-full:AdvertisingExpense
748 Fees and commissions Concept (Monetary) For Period Debit ifrs-full:FeeAndCommissionExpense
749 Operating lease expenses Concept (Monetary) For Period Debit grvy:OperatingLeaseExpenses
750 Salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
751 Expenses related to defined contribution plans Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
752 Employee benefits Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
753 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
754 Amortization Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
755 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
756 Total selling, general and administrative expense Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
757 100850 - Disclosure - Other Income and Expenses - Summary of Other Income (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureOtherIncomeAndExpensesSummaryOfOtherIncomeDetails
758 Implied Table Table

*

*

 implied:Table
759 Other Income And Expense [Abstract] Abstract grvy:OtherIncomeAndExpenseAbstract
760 Gain on disposal of property and equipment Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
761 Miscellaneous gain Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
762 Total Concept (Monetary) For Period Credit ifrs-full:OtherIncome
763 100860 - Disclosure - Other Income and Expenses - Summary of Other Expense (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureOtherIncomeAndExpensesSummaryOfOtherExpenseDetails
764 Implied Table Table

*

*

 implied:Table
765 Other Income And Expense [Abstract] Abstract grvy:OtherIncomeAndExpenseAbstract
766 Loss on retirement and disposal of property and equipment Concept (Monetary) For Period Debit grvy:LossOnRetirementAndDisposalOfPropertyAndEquipment
767 Impairment loss on intangible assets Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
768 Miscellaneous loss Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
769 Total Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByFunction
770 100870 - Disclosure - Finance Income And Costs - Summary of Finance Income And Cost (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinanceIncomeAndCostsSummaryOfFinanceIncomeAndCostDetails
771 Disclosure Of Finance Income And Costs [Table] Table

*

*

 grvy:DisclosureOfFinanceIncomeAndCostsTable
772 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
773 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
774 Interest Income Member grvy:InterestsIncomeMember
775 Unrealized Foreign Currency Gain Member grvy:ForeignCurrencyTranslationsIncomeMember
776 Gain on Foreign Currency Transaction Member grvy:GainOnForeignCurrencyTransactionsIncomeMember
777 Unrealized Foreign Currency Loss Member grvy:ForeignCurrencyTranslationsCostsMember
778 Loss on Foreign Currency Transaction Member grvy:LossOnForeignCurrencyCostsTransactionsMember
779 Others Member grvy:OthersMember
780 Disclosure Of Finance Income And Costs [Line Items] LineItems grvy:DisclosureOfFinanceIncomeAndCostsLineItems
781 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
782 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
783 100880 - Disclosure - Income Taxes - Schedule of Income Tax Expense (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIncomeTaxesScheduleOfIncomeTaxExpenseDetails
784 Implied Table Table

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785 Major Components Of Tax Expense Income [Abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
786 Current tax expense Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
787 Deferred tax expense (benefit) Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
788 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
789 100890 - Disclosure - Income Taxes - Summary of Reconciliation Between Actual Income Tax Expense and Amount Computed by Applying Applicable Tax Rate to Profit Before Tax (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIncomeTaxesSummaryOfReconciliationBetweenActualIncomeTaxExpenseAndAmountComputedByApplyingApplicableTaxRateToProfitBeforeTaxDetails
790 Implied Table Table

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 implied:Table
791 Reconciliation Of Accounting Profit Multiplied By Applicable Tax Rates [Abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
792 Profit before income tax Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
793 Income tax using the statutory tax rate of each country Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
794 Non-deductible expenses Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
795 Foreign taxes paid but not utilized as tax credit Concept (Monetary) For Period Debit grvy:ForeignTaxesPaidButNotUtilizedAsTaxCreditOrRecognizedAsDeferredTaxAsset
796 Utilization of previously unrecognized deferred tax asset Concept (Monetary) For Period Debit grvy:UtilizationOfPreviouslyUnrecognizedDeferredTaxAsset
797 Reassessment of previously unrecognized deferred tax assets Concept (Monetary) For Period Credit ifrs-full:TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceDeferredTaxExpense
798 Effect of change foreign currency exchange rate Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
799 Others Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
800 Total adjustments Concept (Monetary) For Period Debit grvy:AdjustmentsToReconcileProfitLoss
801 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
802 Effective tax rate Concept (Percent) For Period ifrs-full:AverageEffectiveTaxRate
803 100900 - Disclosure - Income Taxes - Additional Information (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails
804 Implied Table Table

*

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 implied:Table
805 Income Taxes [Abstract] Abstract grvy:IncomeTaxesAbstract
806 Applicable tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
807 Temporary differences not recognised as deferred income tax assets Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
808 Temporary difference related to investments in subsidiaries not recognized as deferred tax assets Concept (Monetary) As Of grvy:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesForWhichNoDeferredTaxAssetIsRecognised
809 100910 - Disclosure - Income Taxes - Schedule of Changes in Deferred Income Tax Assets (Liabilities) Recognized in Statements of Financial Position (Details) Network

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*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIncomeTaxesScheduleOfChangesInDeferredIncomeTaxAssetsLiabilitiesRecognizedInStatementsOfFinancialPositionDetails
810 Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
811 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
812 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
813 Deferred Tax Assets Member grvy:DeferredTaxAssetsTemporaryDifferenceMember
814 Intangible Assets Member grvy:IntangibleAssetsTemporaryDifferenceMember
815 Other Non-current Assets Member grvy:OtherNonCurrentAssetTemporaryDifferenceMember
816 Accounts Payables Member grvy:AccountsPayablesTemporaryDifferenceMember
817 Accrued Expenses Member grvy:AccruedExpensesTemporaryDifferenceMember
818 Deferred Revenue Member grvy:DeferredRevenueTemporaryDifferenceMember
819 Allowance for Doubtful Account Member grvy:AllowanceForDoubtfulAccountTemporaryDifferenceMember
820 Other Non-current Liabilities Member grvy:OtherNonCurrentLiabilityTemporaryDifferenceMember
821 Investments in Subsidiaries Member grvy:InvestmentsInSubsidiariesTemporaryDifferenceMember
822 Others Member ifrs-full:OtherTemporaryDifferencesMember
823 Deferred tax liabilities Member grvy:DeferredTaxLiabilitiesTemporaryDifferenceMember
824 Foreign Taxes Paid Member grvy:ForeignTaxesPaidTemporaryDifferenceMember
825 Property and Equipment Member grvy:PropertyAndEquipmentTemporaryDifferenceMember
826 Deferred Income Tax on Temporary Differences Member ifrs-full:TemporaryDifferenceMember
827 Deferred Tax Asset for Tax Losses Carryforwards Member grvy:DeferredTaxAssetForTaxLossesCarryforwardsMember
828 Deferred Tax Asset for Tax Credits Member grvy:DeferredTaxAssetForTaxCreditsMember
829 Unrecognized Deferred Tax Assets Member grvy:UnrecognizedDeferredTaxAssetsMember
830 Deferred Tax Assets Member grvy:DeferredTaxAssetsMember
831 Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
832 Beginning balance Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
833 Increase (decrease) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInDeferredTaxLiabilityAsset
834 Ending balance Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
835 100920 - Disclosure - Income Taxes - Schedule of Unused Tax Loss Carryforwards and Unused Tax Credit Carryforwards Not Recognized as Deferred Income Tax Assets (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureIncomeTaxesScheduleOfUnusedTaxLossCarryforwardsAndUnusedTaxCreditCarryforwardsNotRecognizedAsDeferredIncomeTaxAssetsDetails
836 Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Table] Table

*

*

 ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
837 Maturity [axis] Axis ifrs-full:MaturityAxis
838 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
839 2019 Member ifrs-full:NotLaterThanOneYearMember
840 2020 Member ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
841 2021 Member ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
842 2022 Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
843 2023 Member ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
844 After 2023 Member ifrs-full:LaterThanFiveYearsMember
845 Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
846 Unused loss carryforwards Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
847 Unused tax credit carryforwards Concept (Monetary) As Of ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
848 100930 - Disclosure - Earnings Per Share - Schedule of Components of Basic Earnings Per Share (Details) Network

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*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureEarningsPerShareScheduleOfComponentsOfBasicEarningsPerShareDetails
849 Implied Table Table

*

*

 implied:Table
850 Basic Earnings Per Share [Abstract] Abstract ifrs-full:BasicEarningsPerShareAbstract
851 Profit attributable to owners of the Parent Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
852 Weighted average outstanding shares of common shares Concept (Shares) For Period ifrs-full:WeightedAverageShares
853 Basic earnings per share Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
854 100940 - Disclosure - Earnings Per Share - Additional Information (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureEarningsPerShareAdditionalInformationDetails
855 Implied Table Table

*

*

 implied:Table
856 Diluted Earnings Per Share [Abstract] Abstract ifrs-full:DilutedEarningsPerShareAbstract
857 Weighted average dilutive potential ordinary shares outstanding Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
858 100950 - Disclosure - Statements of Cash Flows - Summary of Cash Generated From Operations (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureStatementsOfCashFlowsSummaryOfCashGeneratedFromOperationsDetails
859 Implied Table Table

*

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 implied:Table
860 Disclosure Of Cash Flow Statement [Abstract] Abstract grvy:DisclosureOfCashFlowStatementAbstract
861 Profit (loss) for the year Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
862 Depreciation expense Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
863 Amortization expense Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
864 Bad debt expenses Concept (Monetary) For Period Debit grvy:BadDebtExpense
865 Unrealized foreign currency loss Concept (Monetary) For Period Debit grvy:UnrealizedForeignExchangeLoss
866 Loss on retirement and disposal of property and equipment Concept (Monetary) For Period Debit grvy:LossOnRetirementAndDisposalOfPropertyAndEquipment
867 Impairment losses on intangible assets Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
868 Post-employment benefit expense Concept (Monetary) For Period Debit grvy:PostEmploymentBenefitExpense
869 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
870 Unrealized foreign currency gain Concept (Monetary) For Period Credit grvy:UnrealizedForeignExchangeGain
871 Interest income Concept (Monetary) For Period Credit ifrs-full:InterestIncomeOnLoansAndReceivables
872 Gain on disposal of property and equipment Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
873 Change in accounts receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
874 Change in other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables
875 Change in prepaid expenses Concept (Monetary) For Period Credit grvy:IncreaseDecreaseInPrepaidExpenses
876 Change in other current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
877 Change in other non-current assets Concept (Monetary) For Period Credit grvy:IncreaseDecreaseInOtherNonCurrentAssets1
878 Change in accounts payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
879 Change in deferred revenue Concept (Monetary) For Period Debit grvy:AdjustmentsForIncreaseDecreaseInDeferredRevenue
880 Change in withholdings Concept (Monetary) For Period Debit grvy:IncreaseDecreaseInWithholdings
881 Change in accrued expenses Concept (Monetary) For Period Debit grvy:AdjustmentsForIncreaseDecreaseInAccruedExpenses
882 Change in other current liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities
883 Change in long-term deferred revenue Concept (Monetary) For Period Debit grvy:AdjustmentsForIncreaseDecreaseInLongTermDeferredRevenue
884 Change in other non-current liabilities Concept (Monetary) For Period Debit grvy:AdjustmentsForIncreaseDecreaseInOtherNonCurrentLiabilities
885 Total Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperations
886 100960 - Disclosure - Statements of Cash Flows - Summary of Significant Non-cash Transactions (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureStatementsOfCashFlowsSummaryOfSignificantNonCashTransactionsDetails
887 Implied Table Table

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 implied:Table
888 Disclosure Of Cash Flow Statement [Abstract] Abstract grvy:DisclosureOfCashFlowStatementAbstract
889 Reclassification of other non-current assets to property and equipment Concept (Monetary) For Period Debit grvy:ReclassificationOfOtherNonCurrentAssetsToPropertyAndEquipment
890 Reclassification of other non-current assets to intangible assets Concept (Monetary) For Period Debit grvy:ReclassificationOfOtherNonCurrentAssetsToIntangibleAssets
891 Increase of accounts payables due to software purchasing Concept (Monetary) For Period Credit grvy:IncreaseOfAccountsPayablesDueToSoftwarePurchasing
892 100970 - Disclosure - Financial Risk Management - Schedule of Company's Debt to Equity Ratio (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementScheduleOfCompanySDebtToEquityRatioDetails
893 Implied Table Table

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 implied:Table
894 Disclosure Of Financial Instruments [Abstract] Abstract ifrs-full:DisclosureOfFinancialInstrumentsAbstract
895 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
896 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
897 Debt-to-equity ratio Concept (Percent) For Period grvy:DebtToEquityRatio
898 100980 - Disclosure - Financial Risk Management - Schedule of Monetary Assets and Liabilities Denominated in Foreign Currencies (Details) Network

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*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementScheduleOfMonetaryAssetsAndLiabilitiesDenominatedInForeignCurrenciesDetails
899 Disclosure Of Financial Instruments [Table] Table

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*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
900 Currency Axis srt:CurrencyAxis
901 All Currencies Member currency:AllCurrenciesDomain
902 USD Member currency:USD
903 JPY Member currency:JPY
904 EUR Member currency:EUR
905 IDR Member currency:IDR
906 THB Member currency:THB
907 TWD Member currency:TWD
908 VND Member currency:VND
909 HKD Member currency:HKD
910 BRL Member currency:BRL
911 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
912 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
913 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
914 100990 - Disclosure - Financial Risk Management - Additional Information (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementAdditionalInformationDetails
915 Disclosure Of Financial Instruments [Table] Table

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*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
916 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
917 Risks [member] Member ifrs-full:TypesOfRisksMember
918 Currency Risk Member ifrs-full:CurrencyRiskMember
919 Price Risk Member grvy:PriceRiskMember
920 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
921 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
922 Variable Interest Rate Member ifrs-full:FloatingInterestRateMember
923 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
924 Foreign exchange risk movement in currency percentage Concept (Percent) For Period grvy:ForeignExchangeRiskMovementInCurrencyPercentage
925 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
926 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
927 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
928 101000 - Disclosure - Financial Risk Management - Summary of Impact of Fluctuation in Foreign Currency Exchange Rates on Company's Monetary Assets and Liabilities (Details) Network

*

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementSummaryOfImpactOfFluctuationInForeignCurrencyExchangeRatesOnCompanySMonetaryAssetsAndLiabilitiesDetails
929 Disclosure Of Financial Instruments [Table] Table

*

*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
930 Currency Axis srt:CurrencyAxis
931 All Currencies Member currency:AllCurrenciesDomain
932 USD Member currency:USD
933 JPY Member currency:JPY
934 Others Member grvy:OtherCurrenciesMember
935 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
936 Increase in company's monetary assets and liabilities with the effect of foreign currency exchange rate Concept (Monetary) As Of Debit grvy:IncreaseInMonetaryAssetsAndLiabilitiesDueToIncreaseInForeignCurrencyExchangeRate
937 Decrease in company's monetary assets and liabilities with the effect of foreign currency exchange rate Concept (Monetary) As Of Credit grvy:DecreaseInMonetaryAssetsAndLiabilitiesDueToDecreaseInForeignCurrencyExchangeRate
938 101010 - Disclosure - Financial Risk Management - Summary of Maximum Exposure to Credit Risk (Details) Network

*

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementSummaryOfMaximumExposureToCreditRiskDetails
939 Disclosure Of Credit Risk Exposure [Table] Table

*

*

 ifrs-full:DisclosureOfCreditRiskExposureTable
940 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
941 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
942 Cash and Cash Equivalents Member grvy:CashAndCashEquivalentMember
943 Short Term Financial Instruments Member grvy:ShortTermFinancialInstrumentsMember
944 Accounts Receivables Member ifrs-full:TradeReceivablesMember
945 Other Receivables Member grvy:OtherReceivablesMember
946 Other Current Assets Member grvy:OtherCurrentAssetMember
947 Other Non-current Financial Assets Member grvy:OtherNonCurrentFinancialAssetsMember
948 Disclosure Of Credit Risk Exposure [Line Items] LineItems ifrs-full:DisclosureOfCreditRiskExposureLineItems
949 Maximum exposure to credit risk Concept (Monetary) As Of ifrs-full:MaximumExposureToCreditRisk
950 101020 - Disclosure - Financial Risk Management - Summary of Financial Liabilities by Maturity (Details) Network

*

*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureFinancialRiskManagementSummaryOfFinancialLiabilitiesByMaturityDetails
951 Disclosure Of Maturity Analysis For Financial Assets Held For Managing Liquidity Risk [Table] Table

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*

 ifrs-full:DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskTable
952 Maturity [axis] Axis ifrs-full:MaturityAxis
953 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
954 Less Than Three months Member ifrs-full:LaterThanOneMonthAndNotLaterThanThreeMonthsMember
955 More Than One Year Member ifrs-full:LaterThanOneYearMember
956 Three Months to One Year Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanOneYearMember
957 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
958 Financial Liabilities at Amortized Cost Member ifrs-full:FinancialLiabilitiesMember
959 Accounts Payable Member grvy:AccountsPayablesMember
960 Accrued Expenses Member grvy:AccruedExpensesMember
961 Other Liabilities Member grvy:OtherLiabilityMember
962 Disclosure Of Maturity Analysis For Financial Assets Held For Managing Liquidity Risk [Line Items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForFinancialAssetsHeldForManagingLiquidityRiskLineItems
963 Other payable Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsHeldForManagingLiquidityRisk
964 101030 - Disclosure - Segment Information - Summary of Business Segments (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureSegmentInformationSummaryOfBusinessSegmentsDetails
965 Disclosure Of Operating Segments [Table] Table

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 ifrs-full:DisclosureOfOperatingSegmentsTable
966 Segments [axis] Axis ifrs-full:SegmentsAxis
967 Segments [member] Member ifrs-full:SegmentsMember
968 Reportable Segments Member ifrs-full:ReportableSegmentsMember
969 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
970 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
971 Online Member grvy:OnlineMember
972 Mobile Member grvy:MobileMember
973 Others Member grvy:OthersMember
974 Elimination of intersegment amounts [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
975 Disclosure Of Operating Segments [Line Items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
976 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
977 Depreciation amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
978 Operating profit (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
979 101040 - Disclosure - Segment Information - Summary Revenue from External Customers by Country (Details) Network

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980 Disclosure Of Geographical Areas [Table] Table

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*

 ifrs-full:DisclosureOfGeographicalAreasTable
981 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
982 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
983 Korea Member country:KR
984 Taiwan Member country:TW
985 Japan Member country:JP
986 United States of America Member country:US
987 Thailand Member country:TH
988 Philippines Member country:PH
989 Others Member grvy:OthersMember
990 IDAHO Member stpr:ID
991 China Member country:CN
992 Segments [axis] Axis ifrs-full:SegmentsAxis
993 Segments [member] Member ifrs-full:SegmentsMember
994 Mobile Games and Applications Member grvy:MobileGamesAndApplicationsMember
995 Disclosure Of Geographical Areas [Line Items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
996 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
997 101050 - Disclosure - Segment Information - Summary of Non-Current Assets by Geographical Regions (Details) Network

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998 Disclosure Of Geographical Areas [Table] Table

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 ifrs-full:DisclosureOfGeographicalAreasTable
999 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1000 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1001 Domestic Member ifrs-full:CountryOfDomicileMember
1002 Overseas Member ifrs-full:ForeignCountriesMember
1003 Disclosure Of Geographical Areas [Line Items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
1004 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts
1005 101060 - Disclosure - Segment Information - Additional Information (Details) Network

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1006 Disclosure Of Operating Segments [Table] Table

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1007 Range [axis] Axis ifrs-full:RangeAxis
1008 Ranges [member] Member ifrs-full:RangesMember
1009 Top of Range Member ifrs-full:TopOfRangeMember
1010 Bottom of Range Member ifrs-full:BottomOfRangeMember
1011 Disclosure Of Operating Segments [Line Items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
1012 Number of external customers Concept (Integer) For Period grvy:NumberOfExternalCustomers
1013 Percentage of consolidated sales to external customers Concept (Percent) For Period grvy:SegmentSalesPercentageOfConsolidatedSales
1014 101070 - Disclosure - Transactions with Related Parties - Additional Information (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureTransactionsWithRelatedPartiesAdditionalInformationDetails
1015 Disclosure Of Transactions Between Related Parties [Table] Table

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*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1016 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1017 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1018 GungHo Online Entertainment, Inc [Member] Member grvy:GungHoOnlineEntertainmentIncMember
1019 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1020 Parent entity Concept (Text/String) For Period ifrs-full:NameOfParentEntity
1021 Percentage of ownership held by related party Concept (Percent) For Period grvy:PercentageOfOwnershipHeldByRelatedParty
1022 Number of related party transactions Concept (Decimal) As Of grvy:NumberOfRelatedPartyTransactions
1023 101080 - Disclosure - Transactions with Related Parties - Summary of Major Balances of Receivables and Payables to Related Parties (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureTransactionsWithRelatedPartiesSummaryOfMajorBalancesOfReceivablesAndPayablesToRelatedPartiesDetails
1024 Disclosure Of Transactions Between Related Parties [Table] Table

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 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1025 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1026 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1027 GungHo Online Entertainment, Inc [Member] Member grvy:GungHoOnlineEntertainmentIncMember
1028 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1029 Receivable Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
1030 Payables Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
1031 101090 - Disclosure - Transactions with Related Parties - Summary of Transactions Such As Sales And Purchases (Details) Network

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*

 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureTransactionsWithRelatedPartiesSummaryOfTransactionsSuchAsSalesAndPurchasesDetails
1032 Disclosure Of Transactions Between Related Parties [Table] Table

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*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1033 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1034 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1035 GungHo Online Entertainment, Inc [Member] Member grvy:GungHoOnlineEntertainmentIncMember
1036 ACQUIRE Corp Member grvy:ACQUIRECorpMember
1037 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1038 Sales Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
1039 Purchase Concept (Monetary) For Period Debit ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
1040 101100 - Disclosure - Transactions with Related Parties - Summary of Compensation For Key Management Personnel (Details) Network

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 http://www.gravity.co.kr/20181231/taxonomy/role/DisclosureTransactionsWithRelatedPartiesSummaryOfCompensationForKeyManagementPersonnelDetails
1041 Implied Table Table

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 implied:Table
1042 Related Party Transactions [Abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
1043 Salary Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation

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