The amortization period after the first two years under the terms of the credit facility.

No definition available.

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- Definition

The maximum period of interest payments under the terms of the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount that the line of credit reduces annually.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

+ Details

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- Definition

Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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Data Type:	num:percentItemType
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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

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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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1)(a))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
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Balance Type:	debit
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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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DEBT FACILITIES (Details) - USD ($)				12 Months Ended
DEBT FACILITIES (Details) - USD ($)	Sep. 08, 2017	Aug. 02, 2017	Nov. 01, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Feb. 28, 2015	Aug. 31, 2014
Line of Credit Facility
Savings collateral				$ 75,189
Proceeds from long-term debt				7,500,000	$ 9,820,222	$ 13,440,989
Revolving Term Loan \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Credit facility maximum								$ 18,000,000
Line of credit future reduction amounts				2,000,000
Amounts outstanding under the credit facility	$ 0
Seasonal Revolving Loan \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Credit facility maximum	$ 6,000,000
Amounts outstanding under the credit facility				0
Unused borrowing capacity				$ 6,000,000
Interest rate (as a percent)				3.99%
Savings collateral				$ 0
Revolving term note payable to lending institution \| Heron Lake BioEnergy, LLC
Line of Credit Facility
Credit facility maximum							$ 28,000,000
Line of credit future reduction amounts				3,500,000
Amounts outstanding under the credit facility				0	0
Unused borrowing capacity				$ 17,500,000	$ 21,000,000
Interest rate (as a percent)				4.49%	3.45%
Remaining borrowing capacity				$ 17,500,000
Line of credit unused commitment fee (as a percent)				0.50%
Project Hawkeye Loan \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Credit facility maximum		$ 7,500,000
Interest rate (as a percent)				4.29%
Interest rate floor (as a percent)		3.55%
Maximum period of interest payments		2 years
Debt instrument amortization period after first two years		7 years
One Month LIBOR \| Seasonal Revolving Loan \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Spread above variable interest rate	2.75%
One Month LIBOR \| Revolving term note payable to lending institution \| Heron Lake BioEnergy, LLC
Line of Credit Facility
Spread above variable interest rate				3.25%
One Month LIBOR \| Project Hawkeye Loan \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Spread above variable interest rate		3.05%
Ringneck Energy and; Feed, LLC \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Units purchased			1,500
Ringneck Energy and; Feed, LLC \| Project Hawkeye Loan \| Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC
Line of Credit Facility
Units purchased				1,500
Proceeds from long-term debt				$ 7,500,000