Represents the redemption price per share of Class A Common Voting Membership Stock of the entity.

No definition available.

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- Definition

Represents the amount of consideration paid as a percentage of book value of stock, when the entity exercised its right to recall the stock of any member.

+ References

No definition available.

+ Details

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- Definition

Represents the number of co-venturers in an equity method investment of the entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	ggrou_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ References

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_CoVenturerMember
Namespace Prefix:
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NATURE OF OPERATIONS (Details)		12 Months Ended
NATURE OF OPERATIONS (Details)	Jul. 29, 2009 $ / shares	Dec. 31, 2016	Aug. 31, 2009 $ / shares shares	Aug. 31, 2008 $ / shares shares	Jan. 19, 1994 Partnership
Nature of operations
Number of other partners to ProGold joint venture \| Partnership					2
Redemption price of Class A Common Voting Membership Stock (in dollars per share) \| $ / shares	$ 150
Non-voting preferred stock, authorized (in shares)			10,000	10,000
Non-voting preferred stock, authorized, par value (in dollars per share) \| $ / shares			$ 1,000	$ 1,000
Non-voting preferred stock, issued (in shares)			0	0
Non-voting preferred stock, outstanding (in shares)			0	0
Percentage of book value of stock, paid as a consideration, in the event of right to recall stock of any member was exercised		25.00%
Progold Limited Liability Company [Member]
Nature of operations
Ownership percentage in joint venture		49.00%
Progold Limited Liability Company [Member] \| Co Venturer [Member]
Nature of operations
Ownership percentage in joint venture		51.00%