Statement of Changes in Members' Equity - USD ($)	Granite Falls Energy, LLC [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Members' Equity at Oct. 31, 2013	$ 59,887,346	$ 68,368,003	$ 8,480,657
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(5,509,080)	(5,509,080)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders		84,807	84,807
Noncontrolling Interest, Increase from Subsidiary Equity Issuance		3,936,000	3,936,000
Net Income (Loss) Attributable to Noncontrolling Interest		10,316,612	10,316,612	$ (10,316,612)
Cancellation of accrued distribution to noncontrolling interest				84,807
Net Income (Loss) Attributable to Parent	48,773,891	48,773,891		48,773,891
Members' Equity at Oct. 31, 2014	103,152,157	125,970,233	22,818,076
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	(32,136,300)	(36,757,640)	(4,621,340)	(5,509,080)
Net Income (Loss) Attributable to Noncontrolling Interest		3,360,083	3,360,083	(3,360,083)
Net Income (Loss) Attributable to Parent	13,586,750	13,586,750		13,586,750
Members' Equity at Oct. 31, 2015	84,602,607	106,159,426	21,556,819
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Paid	(9,640,886)	(11,647,445)	(2,006,559)	(32,136,000)
Net Income (Loss) Attributable to Noncontrolling Interest		2,505,454	2,505,454	(2,505,454)
Net Income (Loss) Attributable to Parent	8,722,808	8,722,808		$ 8,722,808
Members' Equity at Oct. 31, 2016	$ 83,684,529	$ 105,740,243	$ 22,055,714