Consolidated Statements of Operations - USD ($)	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Income Statement [Abstract]
Revenues	$ 109,917,652	$ 109,605,544	$ 115,660,469
Cost of Goods Sold	99,488,370	101,112,154	105,248,092
Gross Profit	10,429,282	8,493,390	10,412,377
Operating Expenses	(3,124,687)	(2,999,157)	(3,001,095)
Operating Income	7,304,595	5,494,233	7,411,282
Other Income (Expense):
Interest income	24,668	712	1,312
Interest expense	(212,491)	(397,837)	(444,625)
Other income, net	399,221	97,208	11,747
Total other income (expense), net	211,398	(299,917)	(431,566)
Net Income	7,515,993	5,194,316	6,979,716
Less: Net Income Attributable to Non-controlling Interest	(247,638)	(244,616)	(228,483)
Net Income Attributable to Heron Lake BioEnergy, LLC	$ 7,268,355	$ 4,949,700	$ 6,751,233
Weighted Average Units Outstanding—Basic and Diluted (Class A and B) (in units)	77,932,107	77,932,107	77,932,107
Net Income Per Unit Attributable to Heron Lake BioEnergy, LLC—Basic and Diluted (Class A and B) (in dollars per unit)	$ 0.09	$ 0.06	$ 0.09
Distributions Per Unit (Class A and B) (in dollars per unit)		$ 0.05	$ 0.12