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COMMITMENTS (Details) lb in Millions, gal in Millions, bu in Millions | 12 Months Ended
--- | ---
Jan. 31, 2020 USD ($) MMBTU T lb gal bu | Jan. 31, 2019 USD ($) | Jan. 31, 2018 USD ($)
One Earth Energy And Nu Gen Energy [Member] |  |  |
COMMITMENTS (Details) [Line Items] |  |  |
Forward Purchase Contracts, Quantity (in US Bushels) | bu | 12.1 |  |
Quantity Of Natural Gas Under Sales Commitment (in Millions of British Thermal Units) | MMBTU | 2,500,000 |  |
Quantity of Ethanol under Sales Commitment (in US Gallons) | gal | 28.6 |  |
Quantity of Distillers Grains Under Sales Commitment (in US Tons) | T | 107,000 |  |
Quantity of Non-food Grade Corn Oil Under Sales Commitments (in Pounds) | lb | 16.0 |  |
One Earth Energy And Nu Gen Energy [Member] | Railcars One [Member] |  |  |
COMMITMENTS (Details) [Line Items] |  |  |
Operating Leases, Rent Expense, Net | $ 358,000 | $ 438,000 | $ 438,000
One Earth Energy And Nu Gen Energy [Member] | Distillers Grains Marketing Services [Member] |  |  |
COMMITMENTS (Details) [Line Items] |  |  |
Marketing Expense | $ 936,000 | 1,250,000 | 1,354,000
One Earth Energy [Member] | Natural Gas Pipeline [Member] |  |  |
COMMITMENTS (Details) [Line Items] |  |  |
Lease Expiration Period | 10 years |  |
Operating Leases, Future Minimum Payments Due | $ 4,380,000 |  |
Number of installments payable | 120 |  |
Installment amount | $ 36,500 |  |
One Earth Energy [Member] | Renewal [Member] | Natural Gas Pipeline [Member] |  |  |
COMMITMENTS (Details) [Line Items] |  |  |
Lease Expiration Period | 15 years |  |
Installment amount | $ 29,250 |  |
Refined Coal [Member] |  |  |
COMMITMENTS (Details) [Line Items] |  |  |
Fees Incurred By Subsidiary | $ 4,231,000 | $ 9,927,000 | $ 5,468,000

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