XML 133 R119.htm IDEA: XBRL DOCUMENT
v3.21.1

Segment Information - Additional Information (Details) - Customer | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Operating Segments [Line Items] |  |  |
Number of external customers | 0 | 0 | 0
Top of Range |  |  |
Disclosure Of Operating Segments [Line Items] |  |  |
Percentage of consolidated sales to external customers | 10.00% | 10.00% | 10.00%

X
- Definition Number of external customers. + References No definition available. + Details
Name: | grvy_NumberOfExternalCustomers
Namespace Prefix: | grvy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Segment sales percentage of consolidated sales. + References No definition available. + Details
Name: | grvy_SegmentSalesPercentageOfConsolidatedSales
Namespace Prefix: | grvy_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |