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- Definition

forward contracts

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- Definition

Future Commitment, Dollar

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- Definition

Future Commitment, DT

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- Definition

future commitment, percent of anticipated usage

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- Definition

Future Commitment, Pipeline

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- Definition

Inventory Dollars, Outside Storage

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- Definition

Purchases For Inventory

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- Definition

Revenue Concentration, Future Commitment

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Written Notice

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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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.

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Amount of fees and commissions from financial services and banking activities and correspondent clearing. Includes fees from depositor accounts, credit cards, merchant discounts, and fiduciary and trust activities, guarantee fees, investment advisory, management, and administrative fees, transfer agent fees, and insurance commissions.

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- Definition

The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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Commitments and Contingencies Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Jan. 31, 2014	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Selling and Marketing Expense		$ 1,318,000us-gaap_SellingAndMarketingExpense	$ 1,031,000us-gaap_SellingAndMarketingExpense	$ 743,000us-gaap_SellingAndMarketingExpense
Entity-Wide Revenue, Major Customer, Percentage	100.00%us-gaap_ConcentrationRiskPercentage1
Natural Gas [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Pipeline		9.5
Future Commitment, DT		1,400,000
Corn Oil [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Fees and Commissions		(112,000)	(74,000)	(55,000)
Distillers Grains [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Written Notice		P90D
Contract, Initial Length		P1Y
Fees and Commissions		(518,000)		(745,000)	(650,000)
Granite Falls Energy [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		99.00%	100.00%	100.00%
Granite Falls Energy [Member] \| Natural Gas [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar		1,499,000
future commitment, percent of anticipated usage		50.00%
Granite Falls Energy [Member] \| Ethanol Contracts [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar		23,887,000
Revenue Concentration, Future Commitment		55.00%
Granite Falls Energy [Member] \| Distillers Grains [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar		2,953,000
Revenue Concentration, Future Commitment		45.00%
Granite Falls Energy [Member] \| Initial Length [Member] \| Ethanol Contracts [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Written Notice		P1Y
Granite Falls Energy [Member] \| Renewal Notice [Member] \| Ethanol Contracts [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Written Notice		P90D
Granite Falls Energy [Member] \| Corn Contracts [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
forward contracts		0
Accounts Payable		1,998,000	4,002,000
Purchases For Inventory	82,955,000		153,216,000	148,289,000
Granite Falls Energy [Member] \| Corn Oil [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Written Notice		P90D
Contract, Initial Length		P1Y
Heron Lake Bioenergy [Member] \| Natural Gas [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar		1,356,000
future commitment, percent of anticipated usage		50.00%
Heron Lake Bioenergy [Member] \| Ethanol Contracts [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar				23,915,000
Revenue Concentration, Future Commitment		55.00%
Heron Lake Bioenergy [Member] \| Distillers Grains [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Future Commitment, Dollar		2,669,000
Revenue Concentration, Future Commitment		34.00%
Heron Lake Bioenergy [Member] \| Corn Oil [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Written Notice		P90D
Contract, Initial Length		P1Y
Corn Contracts [Member] \| Granite Falls Energy [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Inventory Dollars, Outside Storage		$ 1,089,700
Inventory, Outside storage		230,000
Corn Contracts [Member] \| Heron Lake Bioenergy [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Inventory, Outside storage		608,000