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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Jan. 31, 2013
Schedule of Inventory, Current [Table Text Block] | The components of inventory at January 31, 2013, and January 31, 2012 are as follows (amounts in thousands):
|  | 2013 |  |  | 2012 |
Ethanol and other finished goods |  | $ | 7,306 |  |  | $ | 5,318 |
Work in process |  |  | 4,414 |  |  |  | 3,819 |
Grain and other raw materials |  |  | 13,199 |  |  |  | 21,212 |
Total |  | $ | 24,919 |  |  | $ | 30,349 |
Property, Plant and Equipment [Table Text Block] | The components of property and equipment at January 31, 2013 and 2012 are as follows (amounts in thousands):
|  | 2013 |  |  | 2012 |
Land and improvements |  | $ | 23,980 |  |  | $ | 25,094 |
Buildings and improvements |  |  | 38,056 |  |  |  | 40,710 |
Machinery, equipment and fixtures |  |  | 221,638 |  |  |  | 212,797 |
Leasehold improvements |  |  | — |  |  |  | 366 |
Construction in progress |  |  | 39 |  |  |  | 7,194 |
|  |  | 283,713 |  |  |  | 286,161 |
Less: accumulated depreciation |  |  | (60,533 | ) |  |  | (46,077 | )
|  | $ | 223,180 |  |  | $ | 240,084 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The following table summarizes options granted, exercised and canceled or expired during the fiscal year ended January 31, 2013:
|  |  |  |  |  |  |  | Weighted Average |  |  |
|  |  |  |  | Weighted |  |  | Remaining |  | Aggregate |
|  | Shares |  |  | Average Exercise |  |  | Contractual Term |  | Intrinsic Value |
|  | (000’s) |  |  | Price |  |  | (in years) |  | (000’s) |
Outstanding—Beginning of year |  |  | 269 |  |  | $ | 13.15 |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |
Exercised |  |  | (100 | ) |  |  | 14.30 |  |  |  |  |  |  |
Canceled or expired |  |  | — |  |  |  | — |  |  |  |  |  |  |
Outstanding and exercisable—End of year |  |  | 169 |  |  | $ | 12.46 |  |  | 1.0 |  | $ | 1,582 |

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- Definition Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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