2.4.0.6 Html 99 201 1 false 43 0 false 8 false false R1.htm 0001000 - Document - Document and Entity Information Document Sheet http://www.granitefallsenergy.com/role/DocumentAndEntityInformationDocument Document and Entity Information Document true false R2.htm 1001000 - Statement - Balance Sheets Sheet http://www.granitefallsenergy.com/role/BalanceSheets Balance Sheets false false R3.htm 1001001 - Statement - Balance Sheets (Parenthetical) Sheet http://www.granitefallsenergy.com/role/BalanceSheetsParenthetical Balance Sheets (Parenthetical) false false R4.htm 1002000 - Statement - Statements of Operations Sheet http://www.granitefallsenergy.com/role/StatementsOfOperations Statements of Operations false false R5.htm 1003000 - Statement - Statement of Changes in Members' Equity Sheet http://www.granitefallsenergy.com/role/StatementOfChangesInMembersEquity Statement of Changes in Members' Equity false false R6.htm 1003001 - Statement - Statement of Changes in Members' Equity parenthetical Sheet http://www.granitefallsenergy.com/role/StatementOfChangesInMembersEquityParenthetical Statement of Changes in Members' Equity parenthetical false false R7.htm 1004000 - Statement - Statements of Cash Flows Sheet http://www.granitefallsenergy.com/role/StatementsOfCashFlows Statements of Cash Flows false false R8.htm 2101100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies false false R9.htm 2104100 - Disclosure - Risks and Uncertainties Sheet http://www.granitefallsenergy.com/role/RisksAndUncertainties Risks and Uncertainties false false R10.htm 2107100 - Disclosure - Concentrations Sheet http://www.granitefallsenergy.com/role/Concentrations Concentrations false false R11.htm 2110100 - Disclosure - Inventory Sheet http://www.granitefallsenergy.com/role/Inventory Inventory false false R12.htm 2113100 - Disclosure - Derivative Instruments Sheet http://www.granitefallsenergy.com/role/DerivativeInstruments Derivative Instruments false false R13.htm 2116100 - Disclosure - Revolving Line of Credit & Long Term Debt Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLongTermDebt Revolving Line of Credit & Long Term Debt false false R14.htm 2122100 - Disclosure - Leases Sheet http://www.granitefallsenergy.com/role/Leases Leases false false R15.htm 2125100 - Disclosure - Fair Value Sheet http://www.granitefallsenergy.com/role/FairValue Fair Value false false R16.htm 2128100 - Disclosure - Members' Equity Sheet http://www.granitefallsenergy.com/role/MembersEquity Members' Equity false false R17.htm 2131100 - Disclosure - Employee Benefit Plans Sheet http://www.granitefallsenergy.com/role/EmployeeBenefitPlans Employee Benefit Plans false false R18.htm 2132100 - Disclosure - Income Taxes Sheet http://www.granitefallsenergy.com/role/IncomeTaxes Income Taxes false false R19.htm 2133100 - Disclosure - Commitments and Contingencies Sheet http://www.granitefallsenergy.com/role/CommitmentsAndContingencies Commitments and Contingencies false false R20.htm 2134100 - Disclosure - Legal Proceedings Sheet http://www.granitefallsenergy.com/role/LegalProceedings Legal Proceedings false false R21.htm 2135100 - Disclosure - Quarterly Financial Data (Unaudited) Sheet http://www.granitefallsenergy.com/role/QuarterlyFinancialDataUnaudited Quarterly Financial Data (Unaudited) false false R22.htm 2201201 - Disclosure - Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies) Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies) false false R23.htm 2301302 - Disclosure - Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) false false R24.htm 2310301 - Disclosure - Inventory by Process (Tables) Sheet http://www.granitefallsenergy.com/role/InventoryByProcessTables Inventory by Process (Tables) false false R25.htm 2313301 - Disclosure - Derivative Instruments (Tables) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentsTables Derivative Instruments (Tables) false false R26.htm 2316301 - Disclosure - Revolving Line of Credit & Long Term Debt Long Term Debt (Tables) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLongTermDebtLongTermDebtTables Revolving Line of Credit & Long Term Debt Long Term Debt (Tables) false false R27.htm 2322301 - Disclosure - Leases Leases (Tables) Sheet http://www.granitefallsenergy.com/role/LeasesLeasesTables Leases Leases (Tables) false false R28.htm 2325301 - Disclosure - Fair Value FMV (Tables) Sheet http://www.granitefallsenergy.com/role/FairValueFmvTables Fair Value FMV (Tables) false false R29.htm 2332301 - Disclosure - Income Taxes (Tables) Sheet http://www.granitefallsenergy.com/role/IncomeTaxesTables Income Taxes (Tables) false false R30.htm 2335301 - Disclosure - Quarterly Financial Data (Unaudited) Quarterly Financials (Tables) Sheet http://www.granitefallsenergy.com/role/QuarterlyFinancialDataUnauditedQuarterlyFinancialsTables Quarterly Financial Data (Unaudited) Quarterly Financials (Tables) false false R31.htm 2401403 - Disclosure - Summary of Significant Accounting Policies P,P, & E Useful Life (Details) Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPoliciesPpEUsefulLifeDetails Summary of Significant Accounting Policies P,P, & E Useful Life (Details) false false R32.htm 2401404 - Disclosure - Summary of Significant Accounting Policies Narrative (Details) Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails Summary of Significant Accounting Policies Narrative (Details) false false R33.htm 2401405 - Disclosure - Summary of Significant Accounting Policies Depreciation Expense (Details) Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPoliciesDepreciationExpenseDetails Summary of Significant Accounting Policies Depreciation Expense (Details) false false R34.htm 2404401 - Disclosure - Risks and Uncertainties Narrative (Details) Sheet http://www.granitefallsenergy.com/role/RisksAndUncertaintiesNarrativeDetails Risks and Uncertainties Narrative (Details) false false R35.htm 2407401 - Disclosure - Concentrations Narrative (Details) Sheet http://www.granitefallsenergy.com/role/ConcentrationsNarrativeDetails Concentrations Narrative (Details) false false R36.htm 2410402 - Disclosure - Inventory Narrative (Details) Sheet http://www.granitefallsenergy.com/role/InventoryNarrativeDetails Inventory Narrative (Details) false false R37.htm 2410403 - Disclosure - Inventory Inventory (Details) Sheet http://www.granitefallsenergy.com/role/InventoryInventoryDetails Inventory Inventory (Details) false false R38.htm 2413402 - Disclosure - Derivative Instruments Narrative (Details) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentsNarrativeDetails Derivative Instruments Narrative (Details) false false R39.htm 2413403 - Disclosure - Derivative Instrument Asset & Liabilities (Details) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentAssetLiabilitiesDetails Derivative Instrument Asset & Liabilities (Details) false false R40.htm 2413404 - Disclosure - Derivative Instrument, Income Statement (Details) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentIncomeStatementDetails Derivative Instrument, Income Statement (Details) false false R41.htm 2416402 - Disclosure - Revolving Line of Credit & Long Term Debt Narrative (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLongTermDebtNarrativeDetails Revolving Line of Credit & Long Term Debt Narrative (Details) false false R42.htm 2416403 - Disclosure - Revolving Line of Credit & Long Term Debt Long Term Debt (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLongTermDebtLongTermDebtDetails Revolving Line of Credit & Long Term Debt Long Term Debt (Details) false false R43.htm 2416404 - Disclosure - Revolving Line of Credit & Long Term Debt Covenants (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLongTermDebtCovenantsDetails Revolving Line of Credit & Long Term Debt Covenants (Details) false false R44.htm 2422402 - Disclosure - Leases Narrative (Details) Sheet http://www.granitefallsenergy.com/role/LeasesNarrativeDetails Leases Narrative (Details) false false R45.htm 2425402 - Disclosure - Fair Value Derivative Instrument (Details) Sheet http://www.granitefallsenergy.com/role/FairValueDerivativeInstrumentDetails Fair Value Derivative Instrument (Details) false false R46.htm 2428401 - Disclosure - Members' Equity Narrative (Details) Sheet http://www.granitefallsenergy.com/role/MembersEquityNarrativeDetails Members' Equity Narrative (Details) false false R47.htm 2431401 - Disclosure - Employee Benefit Plans Narrative (Details) Sheet http://www.granitefallsenergy.com/role/EmployeeBenefitPlansNarrativeDetails Employee Benefit Plans Narrative (Details) false false R48.htm 2432402 - Disclosure - Income Taxes Narrative (Details) Sheet http://www.granitefallsenergy.com/role/IncomeTaxesNarrativeDetails Income Taxes Narrative (Details) false false R49.htm 2433401 - Disclosure - Commitments and Contingencies Narrative (Details) Sheet http://www.granitefallsenergy.com/role/CommitmentsAndContingenciesNarrativeDetails Commitments and Contingencies Narrative (Details) false false R50.htm 2435402 - Disclosure - Quarterly Financial Data (Unaudited) Quarterly Financial Data (Details) Sheet http://www.granitefallsenergy.com/role/QuarterlyFinancialDataUnauditedQuarterlyFinancialDataDetails Quarterly Financial Data (Unaudited) Quarterly Financial Data (Details) false false All Reports Book All Reports Element us-gaap_OperatingLeasesRentExpenseNet had a mix of decimals attribute values: 0 2. Process Flow-Through: 1001000 - Statement - Balance Sheets Process Flow-Through: Removing column 'Oct. 31, 2010' Process Flow-Through: Removing column 'Oct. 31, 2009' Process Flow-Through: 1001001 - Statement - Balance Sheets (Parenthetical) Process Flow-Through: 1002000 - Statement - Statements of Operations Process Flow-Through: Removing column '3 Months Ended Oct. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Jul. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Apr. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Jan. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Oct. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Jul. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Apr. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jan. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Oct. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Jul. 31, 2010' Process Flow-Through: Removing column '3 Months Ended Apr. 30, 2010' Process Flow-Through: Removing column '3 Months Ended Jan. 31, 2010' Process Flow-Through: 1003000 - Statement - Statement of Changes in Members' Equity Process Flow-Through: 1003001 - Statement - Statement of Changes in Members' Equity parenthetical Process Flow-Through: 1004000 - Statement - Statements of Cash Flows gfe-20121031.xml gfe-20121031.xsd gfe-20121031_cal.xml gfe-20121031_def.xml gfe-20121031_lab.xml gfe-20121031_pre.xml true true