DERIVATIVE FINANCIAL INSTRUMENTS (Details) gal in Millions, bu in Millions	12 Months Ended
	Jan. 31, 2018 USD ($) gal bu	Jan. 31, 2017 USD ($) bu	Jan. 31, 2016 USD ($)
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Debt Instrument, Collateral Amount \| $		$ 354,000
Derivative, Gain on Derivative \| $	$ 1,317,000	$ 2,131,000	$ 382,000
Corn [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Forward Purchase Contracts, Quantity \| bu	11.7	5.3
Corn [Member] \| Short/Sell [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Commodity Futures, Quantity \| bu	2.5	0.7
Ethanol [Member] \| Short/Sell [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Commodity Futures, Quantity \| gal	2.8
Ethanol [Member] \| Long/Buy [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Commodity Futures, Quantity \| gal	2.8