Name:	gluu_EmployeeOptionsVestingCriteriaOnePercentage
Namespace Prefix:	gluu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage of stock options granted to employees that vest monthly after the first year from the vesting commencement date.

No definition available.

Name:	gluu_EmployeeOptionsVestingCriteriaTwoPercentage
Namespace Prefix:	gluu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Ratio by which amount of shares available for grant are increased for each restricted stock unit granted.

No definition available.

Name:	gluu_PoolSharesReducedForEachShareGranted
Namespace Prefix:	gluu_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Share Based Compensation Arrangement By Share Based Payment Award Increase As Grant In Period Percentage.

No definition available.

Name:	gluu_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseAsGrantInPeriodPercentage
Namespace Prefix:	gluu_
Data Type:	num:percentItemType
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Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
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Data Type:	xbrli:stringItemType
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Number of additional shares authorized for issuance under an established share-based compensation plan.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Purchase price of common stock expressed as a percentage of its fair value.

No definition available.

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
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Data Type:	na
Balance Type:
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Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
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Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_PlanNameAxis=gluu_EquityIncentivePlanTwoThousandSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_AwardTypeAxis=gluu_IncentiveStockOptionMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_TitleOfIndividualAxis=gluu_TenPercentStockholderMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_AwardTypeAxis=gluu_NonQualifiedStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_PlanNameAxis=gluu_EquityInducementPlanTwoThousandEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_PlanNameAxis=gluu_EmployeeStockPurchasePlanTwoThousandSevenMember
Namespace Prefix:
Data Type:	na
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