The early termination fee payable under the amendment to the corn storage and grain handling agreement.

No definition available.

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- Definition

Future Commitment, Dollar

+ References

No definition available.

+ Details

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- Definition

Inventory, Outside storage

+ References

No definition available.

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

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- 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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- Definition

Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

No definition available.

+ Details

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Commitments and Contingencies (Details)	3 Months Ended		6 Months Ended
Commitments and Contingencies (Details)	Apr. 30, 2017 USD ($) contract	Apr. 30, 2016 USD ($)	Apr. 30, 2017 USD ($) contract bu	Apr. 30, 2016 USD ($)
Distillers' Grains [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar			$ 852,000
Granite Falls Energy, LLC
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Early termination fee payable	$ 255,000		$ 255,000
Granite Falls Energy, LLC \| Corn Contracts
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of derivative contracts \| contract	0		0
Granite Falls Energy, LLC \| Corn Contracts \| Board Members
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Amount of corn purchased	$ 2,569,000	$ 2,990,000	$ 5,594,000	$ 8,636,000
Granite Falls Energy, LLC \| Corn Oil [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar			275,000
Granite Falls Energy, LLC \| Ethanol Contracts
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar			$ 14,000,000
Heron Lake BioEnergy, LLC \| Corn Contracts
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Inventory, Outside storage \| bu			6,653,000
Heron Lake BioEnergy, LLC \| Corn Oil [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar			$ 379,000
Heron Lake BioEnergy, LLC \| Ethanol Contracts
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar			13,810,000
Heron Lake BioEnergy, LLC \| Distillers' Grains [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar			$ 137,000