Stock-based compensation (Details 3) (USD $)	Apr. 02, 2013
Stock option plans, other disclosures
Total unrecognized compensation cost related to unvested share-based compensation arrangements	$ 280,128
Unvested share-based compensation cost expected to be recognized
Remainder of fiscal year 2013	154,504
Fiscal year 2014	81,981
Fiscal year 2015	36,391
Fiscal year 2016	7,084
Fiscal year 2017	$ 168

- Definition

Represents the amount of share-based compensation cost related to option awards expected to be recognized in the next twelve months following the end of current fiscal year.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of share-based compensation cost related to option awards expected to be recognized in the fifth fiscal year following the current fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	gcfb_
Data Type:	xbrli:monetaryItemType
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- Definition

Represents the amount of share-based compensation cost related to option awards expected to be recognized in the fourth fiscal year following the current fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	gcfb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of share-based compensation cost related to option awards expected to be recognized in the third fiscal year following the current fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	gcfb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount of share-based compensation cost related to option awards expected to be recognized in the second fiscal year following the current fiscal year.

+ References

No definition available.

+ Details

Name:	gcfb_EmployeeServiceShareBasedCompensationNonvestedAwardsCostExpectedToBeRecognizedInYearTwoAfterCurrentFiscalYearStockOptions
Namespace Prefix:	gcfb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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- Details

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

+ References

No definition available.

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant