Average term for calculation of percentage payable.

No definition available.

Name:	gfe_AverageTermForCalculationOfPercentagePayable
Namespace Prefix:	gfe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of actual capital expenditures for construction projects, excluding capitalized market costs.

+ References

No definition available.

+ Details

Name:	gfe_CapitalExpenditureReimbursement
Namespace Prefix:	gfe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of initial contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	gfe_ContractInitialLength
Namespace Prefix:	gfe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The distance of natural gas pipeline per the construction and maintenance agreement.

+ References

No definition available.

+ Details

Name:	gfe_DistanceOfNaturalGasPipelineConstructionAndMaintenance
Namespace Prefix:	gfe_
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	duration

- Definition

The distance of the interstate natural gas pipeline from the ethanol plant.

+ References

No definition available.

+ Details

Name:	gfe_DistanceOfNaturalGasPipelineFromEthanolPlant
Namespace Prefix:	gfe_
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the quantity of vehicles under the operating lease agreement.

+ References

No definition available.

+ Details

Name:	gfe_EquipmentLeaseQuantity
Namespace Prefix:	gfe_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	instant

- Definition

Flow charges per thousand gallons of water.

+ References

No definition available.

+ Details

Name:	gfe_FlowChargesPerThousandGallonsOfWater
Namespace Prefix:	gfe_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the initial volume per minute of capacity that is available from the well for which the entity has exclusive rights.

+ References

No definition available.

+ Details

Name:	gfe_InitialVolumePerMinuteOfWellCapacityForWhichEntityHasExclusiveRights
Namespace Prefix:	gfe_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

The agreed monthly fee reduction per management and operating agreement.

+ References

No definition available.

+ Details

Name:	gfe_ManagementFeeReduction
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Term of renewal periods of marketing agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	gfe_MarketingAgreementRenewalPeriods
Namespace Prefix:	gfe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount paid for the monthly base fee.

+ References

No definition available.

+ Details

Name:	gfe_MonthlyBaseFee
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount paid for the monthly variable customer management fees.

+ References

No definition available.

+ Details

Name:	gfe_MonthlyVariableFee
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of terms the agreement automatically renews.

+ References

No definition available.

+ Details

Name:	gfe_NumberOfTermsAgreementAutomaticallyRenewed
Namespace Prefix:	gfe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the operating and administrative/maintenance expenses per year paid by the entity under the agreement.

+ References

No definition available.

+ Details

Name:	gfe_OperatingAndAdministrativeExpensesPaid
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for project management and capital work fees during the period.

+ References

No definition available.

+ Details

Name:	gfe_PaymentOfProjectManagementAndCapitalWorkFees
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage in excess of operating and maintenance cost capped.

+ References

No definition available.

+ Details

Name:	gfe_PercentageInExcessOfOperatingAndMaintenanceCostCapped
Namespace Prefix:	gfe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of products produced by the entity which will be purchased, marketed and resold by the counterparty.

+ References

No definition available.

+ Details

Name:	gfe_PercentageOfProductsProducedByEntityToBePurchasedMarketedAndResoldByCounterparty
Namespace Prefix:	gfe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of date of rail car rehabilitation cost during the period.

+ References

No definition available.

+ Details

Name:	gfe_RailCarRehabilitationCosts
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount as of the balance sheet date of rail car rehabilitation liability.

+ References

No definition available.

+ Details

Name:	gfe_RailCarRehabilitationLiability
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the term of agreement entered by the entity.

+ References

No definition available.

+ Details

Name:	gfe_TermOfAgreement
Namespace Prefix:	gfe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The term of management and operating agreement.

+ References

No definition available.

+ Details

Name:	gfe_TermOfManagementAndOperatingAgreement
Namespace Prefix:	gfe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount capped for the operation and maintenance of well arising from the flow charges placed into the dedicated fund.

+ References

No definition available.

+ Details

Name:	gfe_ThresholdOperatingAndMaintenanceExpensesCapped
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The minimum volume of natural gas the entity will receive per the agreement.

+ References

No definition available.

+ Details

Name:	gfe_VolumeOfNaturalGasAnnuallyEntityToReceive
Namespace Prefix:	gfe_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the administration fee to be paid by the entity as water usage fees under the agreement.

+ References

No definition available.

+ Details

Name:	gfe_WaterUsageFeesAdministrativeFee
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the percentage charged for administration fee as water usage fees under the agreement.

+ References

No definition available.

+ Details

Name:	gfe_WaterUsageFeesAdministrativeFeePercent
Namespace Prefix:	gfe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of water well bond payments of counterparty.

+ References

No definition available.

+ Details

Name:	gfe_WaterUsageFeesBondPaymentsOfCounterparty
Namespace Prefix:	gfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the percentage of profit to be paid by the entity as water usage fees under the agreement.

+ References

No definition available.

+ Details

Name:	gfe_WaterUsageFeesPercentageOfProfit
Namespace Prefix:	gfe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time written notice due to other party for termination of agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	gfe_WrittenNotice
Namespace Prefix:	gfe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

+ Details

Name:	us-gaap_AssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

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

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Primarily represents commissions incurred in the period based upon the sale by commissioned employees or third parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by third parties (such as a distributor or value added reseller).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_SalesCommissionsAndFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_SpecialAssessmentBond
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	srt_OwnershipAxis=gfe_AgrinaturalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=gfe_SwanEngineeringInc.ManagementAndOperatingAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=gfe_SwanEngineeringInc.ProjectManagementAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_EthanolMarketingAgreementWithEcoEnergyInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_RpmgInc.MarketingAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=gfe_CornOilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_UnrelatedCompanyConstructionAndMaintenanceAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=gfe_GraniteFallsEnergyLlcExcludingHeronLakeBioenergyLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=gfe_BoardOfGovernorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=gfe_CornContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=gfe_EthanolContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=gfe_DistillersGrainsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=gfe_RailCarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=gfe_HopperRailCarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_CornForwardCashAndBasisContractsPurchaseCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_FarmCreditServicesPcaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gfe_OneMonthLiborMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=gfe_HeronLakeBioEnergyLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_GavilonIngredientsLlc.AgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_NorthernBorderPipelineCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=gfe_WaterTreatmentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=gfe_AgrinaturalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=gfe_SwanEngineeringInc.AndUnrelatedThirdPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES (Details)		1 Months Ended		3 Months Ended	12 Months Ended
COMMITMENTS AND CONTINGENCIES (Details)	Jul. 01, 2019	Sep. 30, 2019 USD ($) $ / Energy_per_Duration gal	May 31, 2019	Jul. 31, 2016 item	Oct. 31, 2019 USD ($) MMBTU mi item bu	Oct. 31, 2018 USD ($) bu	Oct. 31, 2017 USD ($)	Oct. 31, 2007 USD ($)	Oct. 31, 2006 USD ($)
Agrinatural, LLC
Commitments and contingencies
Minority interest (as a percent)					27.00%
Swan Engineering, Inc. Management and Operating Agreement
Commitments and contingencies
Monthly base fee paid					$ 28,000	$ 38,000	$ 36,000
Monthly variable fee paid					111,000	161,000	157,000
Swan Engineering, Inc. Management and Operating Agreement \| Agrinatural, LLC
Commitments and contingencies
Operating agreement period	5 years
Swan Engineering, Inc. Project Management Agreement
Commitments and contingencies
Operating agreement period	5 years
Payment of project management and capital work fees					45,000	77,000	44,000
Ethanol Marketing Agreement With Eco-Energy, Inc. [Member]
Commitments and contingencies
Fees and commissions					1,183,000	1,181,000	1,159,000
RPMG, Inc. Marketing Agreement [Member] \| Corn oil
Commitments and contingencies
Fees and commissions					$ 154,000	173,000	176,000
Unrelated Company Construction And Maintenance Agreement [Member] \| Minimum
Commitments and contingencies
Minimum volume of natural gas Company to receive annually \| MMBTU					1,400,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Commitments and contingencies
Rail Car Rehabilitation Costs					$ 825,000
Rail Car Rehabilitation Liability					825,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Board of Governors
Commitments and contingencies
Amount of corn purchased					$ 4,896,000	$ 4,139,000	945,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Corn Contracts
Commitments and contingencies
Quantity of commitment \| bu					7,495,000	3,105,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Corn Contracts \| Short/Sale position
Commitments and contingencies
Quantity of commitment \| bu					4,150,000	2,530,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Corn Contracts \| Long/Purchase position
Commitments and contingencies
Quantity of commitment \| bu					3,345,000	575,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Ethanol Contracts \| Short/Sale position
Commitments and contingencies
Value of commitment					$ 14,946,000
Concentration percentage					100.00%
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Distillers' Grains \| Short/Sale position
Commitments and contingencies
Value of commitment					$ 972,000
Concentration percentage					40.00%
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Corn oil \| Short/Sale position
Commitments and contingencies
Value of commitment					$ 333,000
Concentration percentage					80.00%
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Rail Cars
Commitments and contingencies
Equipment Lease, Quantity \| item					170
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Hopper rail cars
Commitments and contingencies
Equipment Lease, Quantity \| item					75
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Corn Forward Cash and Basis Contracts Purchase Commitments
Commitments and contingencies
Quantity of commitment \| bu					3,339,000
Asset impairment charges					$ 0	$ 200,000	0
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Ethanol Marketing Agreement With Eco-Energy, Inc. [Member]
Commitments and contingencies
Term of renewal periods				1 year
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Ethanol Marketing Agreement With Eco-Energy, Inc. [Member] \| Minimum
Commitments and contingencies
Written notice for termination of agreement				90 days
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Ethanol Marketing Agreement With Eco-Energy, Inc. [Member] \| Rail Cars
Commitments and contingencies
Equipment Lease, Quantity \| item					43
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| RPMG, Inc. Marketing Agreement [Member] \| Distillers' Grains
Commitments and contingencies
Initial term					1 year
Fees and commissions					$ 287,000	293,000	276,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| RPMG, Inc. Marketing Agreement [Member] \| Distillers' Grains \| Minimum
Commitments and contingencies
Written notice for termination of agreement					90 days
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| RPMG, Inc. Marketing Agreement [Member] \| Corn oil \| Minimum
Commitments and contingencies
Written notice for termination of agreement					90 days
Initial term					1 year
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Unrelated Company Construction And Maintenance Agreement [Member]
Commitments and contingencies
Distance of natural gas pipeline \| mi					9.5
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Farm Credit Services PCA
Commitments and contingencies
Credit facility maximum		$ 500,000
Interest rate (as a percent)					4.52%
Aggregate principal amount available for borrowing					$ 500,000
Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC \| Farm Credit Services PCA \| One Month LIBOR
Commitments and contingencies
Spread above variable interest rate		2.75%
Heron Lake BioEnergy, LLC
Commitments and contingencies
Rail Car Rehabilitation Costs					551,000
Rail Car Rehabilitation Liability					551,000
Heron Lake BioEnergy, LLC \| Board of Governors
Commitments and contingencies
Amount of corn purchased					$ 11,478,000	$ 14,483,000	9,811,000
Heron Lake BioEnergy, LLC \| Corn Contracts
Commitments and contingencies
Quantity of commitment \| bu					5,398,000	2,685,000
Heron Lake BioEnergy, LLC \| Corn Contracts \| Short/Sale position
Commitments and contingencies
Quantity of commitment \| bu					3,267,000	2,175,000
Heron Lake BioEnergy, LLC \| Corn Contracts \| Long/Purchase position
Commitments and contingencies
Quantity of commitment \| bu					2,131,000	510,000
Heron Lake BioEnergy, LLC \| Ethanol Contracts \| Short/Sale position
Commitments and contingencies
Value of commitment					$ 13,490,000
Concentration percentage					92.00%
Heron Lake BioEnergy, LLC \| Distillers' Grains \| Short/Sale position
Commitments and contingencies
Value of commitment					$ 1,275,000
Concentration percentage					21.00%
Heron Lake BioEnergy, LLC \| Corn oil \| Short/Sale position
Commitments and contingencies
Value of commitment					$ 468,000
Concentration percentage					75.00%
Heron Lake BioEnergy, LLC \| Rail Cars
Commitments and contingencies
Equipment Lease, Quantity \| item					138
Heron Lake BioEnergy, LLC \| Hopper rail cars
Commitments and contingencies
Equipment Lease, Quantity \| item					50
Heron Lake BioEnergy, LLC \| Corn Forward Cash and Basis Contracts Purchase Commitments
Commitments and contingencies
Quantity of commitment \| bu					2,740,000
Asset impairment charges						$ 323,000
Heron Lake BioEnergy, LLC \| Ethanol Marketing Agreement With Eco-Energy, Inc. [Member]
Commitments and contingencies
Number of terms agreement automatically renews \| item				3
Term of renewal periods				3 years	1 year
Percentage of products produced by the entity					100.00%
Heron Lake BioEnergy, LLC \| Ethanol Marketing Agreement With Eco-Energy, Inc. [Member] \| Minimum
Commitments and contingencies
Written notice for termination of agreement				3 months	90 days
Heron Lake BioEnergy, LLC \| RPMG, Inc. Marketing Agreement [Member] \| Corn oil
Commitments and contingencies
Initial term					1 year
Heron Lake BioEnergy, LLC \| RPMG, Inc. Marketing Agreement [Member] \| Corn oil \| Minimum
Commitments and contingencies
Written notice for termination of agreement					90 days
Heron Lake BioEnergy, LLC \| Gavilon Ingredients, LLC. Agreement [Member]
Commitments and contingencies
Initial term					6 months
Fees and commissions					$ 287,000	252,000	268,000
Heron Lake BioEnergy, LLC \| Gavilon Ingredients, LLC. Agreement [Member] \| Minimum
Commitments and contingencies
Written notice for termination of agreement					60 days
Heron Lake BioEnergy, LLC \| Northern Border Pipeline Company [Member]
Commitments and contingencies
Distance of the natural gas pipeline from the ethanol plant \| mi					16
Heron Lake BioEnergy, LLC \| Water Agreement
Commitments and contingencies
Monthly base fee paid		$ 1,500
Initial term		2 years	30 years
Term of agreement		10 years
Initial volume per minute of capacity that is available from the well for which the entity has exclusive rights (in gallons) \| gal		600
Flow charges (in dollar $ percent) \| $ / Energy_per_Duration		0.60
Operating and maintenance expenses capped		$ 300,000
Percentage in excess of operating and maintenance cost capped		55.00%
Average term		2 years
City's water well bond payments		$ 735,000
Administrative fee to be paid as water usage fees (as a percent)		5.00%
Administrative fee		$ 594,000
Percentage of profit to be paid as water usage fees		10.00%
Assessment		$ 367,000						$ 500,000	$ 3,550,000
Operating and administrative/maintenance expenses paid		$ 12,000			$ 52,000	$ 92,000	$ 24,000
Agrinatural, LLC \| Swan Engineering, Inc. Management and Operating Agreement
Commitments and contingencies
Monthly fee reduction					$ 4,500
Agrinatural, LLC \| Swan Engineering, Inc. Project Management Agreement
Commitments and contingencies
Capital expenditure reimbursement (as a percent)					10.00%
Swan Engineering, Inc. and Unrelated Third Party \| Swan Engineering, Inc. Management and Operating Agreement \| Agrinatural, LLC
Commitments and contingencies
Minority interest (as a percent)					27.00%