Members' Equity (Details) - USD ($)		3 Months Ended	12 Months Ended
	Dec. 18, 2014	Jan. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Membership Units, Issued		30,606	30,606
Membership Units, Outstanding		30,606	30,606
Granite Falls Energy, LLC [Member]
Distribution Made to Membership, Cash Distribution Paid per Unit			$ 315	$ 1,050
Distribution Made to Member or Limited Partner, Cash Distributions Paid			9,641,000	$ 32,136,000
Heron Lake Bio-energy LLC [Member]
Distribution Made to Member or Limited Partner, Cash Distributions Paid	$ 9,352,000		$ 3,897,000
Distribution Made to Limited Liability Company (LLC) Member, Distributions Paid, Per Unit		$ 0.12	$ 0.05
Heron Lake Bio-energy LLC [Member] | Noncontrolling Interest [Member]
Distribution Made to Member or Limited Partner, Cash Distributions Paid			$ 4,621,000