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NET SALES AND REVENUE (Details) - Schedule of Sales of Consolidated Ethanol Plants - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Revenue from External Customer [Line Items]      
Product or Service $ 453,799 $ 436,488 $ 572,230
Ethanol [Member]      
Revenue from External Customer [Line Items]      
Product or Service 358,349 333,200 452,831
Dried Distillers Grains [Member]      
Revenue from External Customer [Line Items]      
Product or Service 71,204 81,116 96,328
Non-Food Grade Corn Oil [Member]      
Revenue from External Customer [Line Items]      
Product or Service 18,518 15,510 16,985
Modified Distillers Grains [Member]      
Revenue from External Customer [Line Items]      
Product or Service 5,326 5,999 4,814
Other Product [Member]      
Revenue from External Customer [Line Items]      
Product or Service $ 402 $ 663 $ 1,272