XML 70 R56.htm IDEA: XBRL DOCUMENT
v3.21.1

Significant Accounting Policies - Additional Information (Details) - KRW (₩) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Disclosure Of Significant Accounting Policies [Abstract] |  |  |
Transfers of financial assets | ₩ 0 | ₩ 0 | ₩ 0
Common stock equivalents outstanding | 0 | 0 |

X
- Definition Disclosure of significant accounting policies. + References No definition available. + Details
Name: | grvy_DisclosureOfSignificantAccountingPoliciesAbstract
Namespace Prefix: | grvy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of transferred financial assets that are not derecognised in their entirety. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 42D -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_42D_d&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FairValueOfTransferredFinancialAssetsThatAreNotDerecognisedInTheirEntirety
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_iv&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NumberOfSharesOutstanding
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant