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NET SALES AND REVENUE (Details) - Schedule of Sales of Consolidated Ethanol Plants - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Revenue from External Customer [Line Items]
Product or Service	$ 436,488	$ 572,230	$ 666,045
Ethanol [Member]
Revenue from External Customer [Line Items]
Product or Service	333,200	452,831	500,203
Dried Distillers Grains [Member]
Revenue from External Customer [Line Items]
Product or Service	81,116	96,328	125,575
Non-Food Grade Corn Oil [Member]
Revenue from External Customer [Line Items]
Product or Service	15,510	16,985	18,788
Modified Distillers Grains [Member]
Revenue from External Customer [Line Items]
Product or Service	5,999	4,814	18,998
Other Product [Member]
Revenue from External Customer [Line Items]
Product or Service	$ 663	$ 1,272	$ 2,481

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Revenue earned during the period from alternative energy sources (for example, ethanol, biomass, solar, geothermal, and wind power).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62246-109447

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 23
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447

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