2.4.0.6 Html 32 121 1 false 8 0 false 4 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 - Condensed Balance Sheets Sheet http://www.granitefallsenergy.com/role/CondensedBalanceSheets Condensed Balance Sheets false false R3.htm 1001500 - Statement - Condensed Balance Sheets (Parenthetical) Sheet http://www.granitefallsenergy.com/role/CondensedBalanceSheetsParenthetical Condensed Balance Sheets (Parenthetical) false false R4.htm 1002000 - Statement - Condensed Statements of Operations Sheet http://www.granitefallsenergy.com/role/CondensedStatementsOfOperations Condensed Statements of Operations false false R5.htm 1003000 - Statement - Condensed Statements of Cash Flows Sheet http://www.granitefallsenergy.com/role/CondensedStatementsOfCashFlows Condensed Statements of Cash Flows false false R6.htm 2101100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies false false R7.htm 2104100 - Disclosure - Risks and Uncertainties Sheet http://www.granitefallsenergy.com/role/RisksAndUncertainties Risks and Uncertainties false false R8.htm 2107100 - Disclosure - Inventory Sheet http://www.granitefallsenergy.com/role/Inventory Inventory false false R9.htm 2107101 - Disclosure - Inventory Level 3 (Notes) Notes http://www.granitefallsenergy.com/role/InventoryLevel3Notes Inventory Level 3 (Notes) false false R10.htm 2110100 - Disclosure - Derivative Instruments Sheet http://www.granitefallsenergy.com/role/DerivativeInstruments Derivative Instruments false false R11.htm 2113100 - Disclosure - Revolving Line of Credit Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCredit Revolving Line of Credit false false R12.htm 2116100 - Disclosure - Long-Term Debt Sheet http://www.granitefallsenergy.com/role/LongTermDebt Long-Term Debt false false R13.htm 2116101 - Disclosure - Long-Term Debt Level 3 (Notes) Notes http://www.granitefallsenergy.com/role/LongTermDebtLevel3Notes Long-Term Debt Level 3 (Notes) false false R14.htm 2119100 - Disclosure - Leases Sheet http://www.granitefallsenergy.com/role/Leases Leases false false R15.htm 2122100 - Disclosure - Members' Equity Sheet http://www.granitefallsenergy.com/role/MembersEquity Members' Equity false false R16.htm 2125100 - Disclosure - Fair Value Sheet http://www.granitefallsenergy.com/role/FairValue Fair Value false false R17.htm 2128100 - Disclosure - Commitments and Contingencies Sheet http://www.granitefallsenergy.com/role/CommitmentsAndContingencies Commitments and Contingencies false false R18.htm 2131100 - Disclosure - Legal Proceedings Sheet http://www.granitefallsenergy.com/role/LegalProceedings Legal Proceedings false false R19.htm 2133100 - Disclosure - Revenue Recognition Sheet http://www.granitefallsenergy.com/role/RevenueRecognition Revenue Recognition false false R20.htm 2134100 - Disclosure - Derivatives Sheet http://www.granitefallsenergy.com/role/Derivatives Derivatives false false R21.htm 2135100 - Disclosure - Debt Schedule Sheet http://www.granitefallsenergy.com/role/DebtSchedule Debt Schedule false false R22.htm 2201201 - Disclosure - Summary of Significant Accounting Policies Level 2 (Notes) Notes http://www.granitefallsenergy.com/role/SummaryOfSignificantAccountingPoliciesLevel2Notes Summary of Significant Accounting Policies Level 2 (Notes) false false R23.htm 2310301 - Disclosure - Derivative Instruments (Tables) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentsTables Derivative Instruments (Tables) false false R24.htm 2310302 - Disclosure - Derivative Instruments Derivative presentation in equity (Tables) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentsDerivativePresentationInEquityTables Derivative Instruments Derivative presentation in equity (Tables) false false R25.htm 2325301 - Disclosure - Fair Value fair value (Tables) Sheet http://www.granitefallsenergy.com/role/FairValueFairValueTables Fair Value fair value (Tables) false false R26.htm 2407403 - Disclosure - Inventory Details (Details) Sheet http://www.granitefallsenergy.com/role/InventoryDetailsDetails Inventory Details (Details) false false R27.htm 2407404 - Disclosure - Inventory inventory valuation (Details) Sheet http://www.granitefallsenergy.com/role/InventoryInventoryValuationDetails Inventory inventory valuation (Details) false false R28.htm 2410403 - Disclosure - Derivative Instruments (Details) Sheet http://www.granitefallsenergy.com/role/DerivativeInstrumentsDetails Derivative Instruments (Details) false false R29.htm 2413402 - Disclosure - Revolving Line of Credit (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditDetails Revolving Line of Credit (Details) false false R30.htm 2413403 - Disclosure - Revolving Line of Credit Line of Credit (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLineOfCreditDetails Revolving Line of Credit Line of Credit (Details) false false R31.htm 2413405 - Disclosure - Revolving Line of Credit line of credit 2 (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLineOfCredit2Details Revolving Line of Credit line of credit 2 (Details) false false R32.htm 2413406 - Disclosure - Revolving Line of Credit letters of credit (Details) Sheet http://www.granitefallsenergy.com/role/RevolvingLineOfCreditLettersOfCreditDetails Revolving Line of Credit letters of credit (Details) false false R33.htm 2416402 - Disclosure - Long-Term Debt capital lease (Details) Sheet http://www.granitefallsenergy.com/role/LongTermDebtCapitalLeaseDetails Long-Term Debt capital lease (Details) false false R34.htm 2419402 - Disclosure - Leases (Details) Sheet http://www.granitefallsenergy.com/role/LeasesDetails Leases (Details) false false R35.htm 2422402 - Disclosure - Members' Equity (Details) Sheet http://www.granitefallsenergy.com/role/MembersEquityDetails Members' Equity (Details) false false R36.htm 2425402 - Disclosure - Fair Value (Details) Sheet http://www.granitefallsenergy.com/role/FairValueDetails Fair Value (Details) false false R37.htm 2428402 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.granitefallsenergy.com/role/CommitmentsAndContingenciesDetails Commitments and Contingencies (Details) false false R38.htm 2434402 - Disclosure - Derivatives (Details) Sheet http://www.granitefallsenergy.com/role/DerivativesDetails Derivatives (Details) false false All Reports Book All Reports Process Flow-Through: 1001000 - Statement - Condensed Balance Sheets Process Flow-Through: Removing column 'Jul. 31, 2011' Process Flow-Through: Removing column 'Oct. 31, 2010' Process Flow-Through: 1001500 - Statement - Condensed Balance Sheets (Parenthetical) Process Flow-Through: 1002000 - Statement - Condensed Statements of Operations Process Flow-Through: 1003000 - Statement - Condensed Statements of Cash Flows gfe-20120731.xml gfe-20120731.xsd gfe-20120731_cal.xml gfe-20120731_def.xml gfe-20120731_lab.xml gfe-20120731_pre.xml true true