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: