Subsequent Events - Additional Information (Detail) - Subsequent Event [Member] - Public Warrant [Member] $ in Millions	Jan. 20, 2023 USD ($) shares
Subsequent Event [Line Items]
Cash Proceeds from warrants exercises \| $	$ 6.8
Class of warrants or rights outstanding	0
Warrant [Member]
Subsequent Event [Line Items]
Warrants elected To exercise	6,834,987
Warrants elected to exercise in cash basis	2,149,000
Warrants elected To exercise In cashless basis	833,289

Class of warrants or rights warrants issued during the period units.

No definition available.

Name:	geni_ClassOfWarrantsOrRightsWarrantsIssuedDuringThePeriodUnits
Namespace Prefix:	geni_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrants or rights warrants issued on cash basis during the period units.

+ References

No definition available.

+ Details

Name:	geni_ClassOfWarrantsOrRightsWarrantsIssuedOnCashBasisDuringThePeriodUnits
Namespace Prefix:	geni_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrants or rights warrants issued on cashless basis during the period units.

+ References

No definition available.

+ Details

Name:	geni_ClassOfWarrantsOrRightsWarrantsIssuedOnCashlessBasisDuringThePeriodUnits
Namespace Prefix:	geni_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromWarrantExercises
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=geni_PublicWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: