Name:	gmcr_FungiblePoolUnitsAwardConversionRatio
Namespace Prefix:	gmcr_
Data Type:	xbrli:pureItemType
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Period Type:	duration

The ratio of units counted against the shares of common stock authorized under the plan to awards issued, for stock options and stock appreciation rights.

No definition available.

Name:	gmcr_FungiblePoolUnitsOptionsAndRightsConversionRatio
Namespace Prefix:	gmcr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

The number of officers of the entity with outstanding awards from previous inducement grants.

No definition available.

Name:	gmcr_NumberOfOfficersWithAwardsUnderPreviousInducementGrants
Namespace Prefix:	gmcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of previous inducement grants not subject to shareholder approval under which awards remain outstanding.

No definition available.

Name:	gmcr_NumberOfPreviousInducementGrants
Namespace Prefix:	gmcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the percentage of common stock to be owned to increase the option price at the date of grant.

No definition available.

Name:	gmcr_PercentageOfCommonStockToBeOwnedToIncreaseOptionPriceAtDateOfGrant
Namespace Prefix:	gmcr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The length of each withholding period under the plan.

No definition available.

Name:	gmcr_ShareBasedCompensationArrangementByShareBasedPaymentAwardLengthOfWithholdingPeriods
Namespace Prefix:	gmcr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of withholding periods in each fiscal year under the plan.

No definition available.

Name:	gmcr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfWithholdingPeriodsPerFiscalYear
Namespace Prefix:	gmcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Purchase price of common stock expressed as a percentage of its fair value, if the grantee owns in excess of a specified level of the entity's common stock at the date of grant.

No definition available.

Name:	gmcr_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePriceOfCommonStockPercentAtSpecifiedOwnershipLevel
Namespace Prefix:	gmcr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

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.

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

Number of options outstanding, including both vested and non-vested options.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

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

No definition available.