Acquisition (Details) (USD $)	9 Months Ended	12 Months Ended					3 Months Ended	12 Months Ended			3 Months Ended
	Jul. 31, 2013 governor	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Jul. 31, 2013 Project Viking, LLC [Member]	Jul. 31, 2013 Heron Lake Bioenergy [Member] gal	Oct. 31, 2013 Heron Lake Bioenergy [Member]	Oct. 31, 2012 Heron Lake Bioenergy [Member]	Oct. 31, 2011 Heron Lake Bioenergy [Member]	Jul. 31, 2013 Capital Unit, Class A [Member]	Jul. 31, 2013 Capital Unit, Class B [Member]
Business Acquisition [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest		$ 526,752	$ 0	$ 0				$ 527,000
Debt Instrument, Fair Value Disclosure								36,500,000
Debt premium								2,300,000
Business Acquisition, Pro Forma Revenue		349,304,556	343,821,978	320,641,864
Cash Acquired from Acquisition		1,158,774	685,828	13,064,560	10,664,225		1,022,764
Business Acquisition, Cost of Acquired Entity, Cash Paid	8,000,000
Equity Method Investment, Ownership Percentage	12.82%					100.00%	63.30%
Business Acquisition, Cost of Acquired Entity, Purchase Price	17,024,500						17,024,500
Plant production capacity							50,000,000
Membership Units, Acquired							39,080,949				24,080,949	15,000,000
Membership Units, Issued		30,606	30,606	30,656			61,697,104
Board of Governors, Seats Appointed	5
Board of Governors, Total Seats	9
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		39.20%					36.66%
Business Acquisition, Purchase Price Allocation, Notes Payable and Long-term Debt	4,024,500
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	5,000,000
Restricted Cash and Cash Equivalents		393,750	494,000				510,955
Accounts Receivable, Net, Current							3,107,121	3,107,000
Inventory, Net		12,370,277	12,013,169				2,303,157
Prepaid Expense, Current							1,107,025
Property, Plant and Equipment, Net		88,808,855	40,418,082				51,625,774
Other Assets, Noncurrent							924,252
Goodwill		1,372,473	0				1,372,473
Total Assets		112,673,222	61,133,132				61,973,521
Accounts Payable, Current		3,058,633	3,527,840				(936,893)
Accrued Liabilities, Current		696,858	318,819				(399,623)
Notes Payable							(36,452,764)
Stockholders' Equity Attributable to Noncontrolling Interest		8,480,657	0				(7,159,741)
Business Acquisition, Pro Forma Net Income (Loss)		4,864,820	(31,794,779)	13,612,987				712,289	(20,702,684)	361,351
Earnings Per Share, Basic and Diluted		$ 327.78	$ 5.25	$ 400.96				$ 116.16	$ (617.00)	$ 412.75
Management Services Agreement, Initial Term							three
Management Services Agreement, Monthly Fee, Year 1							35,000
Management Serices Agreement, Monthly Fee Percent of Salaries, Year 2							50.00%
Management Services Agreement, Termination Notice							90-days
Goodwill, Allocation Adjustment								273,000
Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized								38,560,522
Business Combinations, Separately Recognized TRansactions, net earnings recognized								$ 1,305,044
Weighted Average Number of Shares Outstanding, Basic								30,606	30,656	30,614
Weighted Average Number of Shares Outstanding, Diluted								30,606	30,656	30,614