SUBSEQUENT EVENTS (Details) - Granite Falls Energy, LLC Excluding Heron Lake BioEnergy, LLC - USD ($)		12 Months Ended
Dec. 11, 2019	Oct. 31, 2019
Subsequent Event [Line Items]
Deposit recorded with other assets		$ 225,000
Subsequent Event
Subsequent Event [Line Items]
Payments To Acquire Noncontrolling Interest	$ 2,225,000

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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