REX American Resources (REX) 10-Q 4 Jun 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Apr. 30, 2018	Jun. 01, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	REX AMERICAN RESOURCES Corp
Document Type	10-Q
Current Fiscal Year End Date	--01-31
Entity Common Stock, Shares Outstanding		6,433,744
Amendment Flag	false
Entity Central Index Key	744,187
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Apr. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 64,246	$ 190,988
Short-term investments	111,495
Restricted cash	896	354
Accounts receivable	21,263	12,913
Inventory	26,088	20,755
Refundable income taxes	7,861	6,612
Prepaid expenses and other	8,056	7,412
Total current assets	239,905	239,034
Property and equipment, net	193,969	197,827
Other assets	7,444	7,454
Equity method investments	35,246	34,549
Total assets	476,564	478,864
Current liabilities:
Accounts payable, trade	8,803	8,149
Accrued expenses and other current liabilities	10,956	13,716
Total current liabilities	19,759	21,865
Long-term liabilities:
Deferred taxes	19,435	21,706
Other long-term liabilities	4,039	3,367
Total long-term liabilities	23,474	25,073
REX shareholders’ equity:
Common stock	299	299
Paid-in capital	146,981	146,923
Retained earnings	557,409	547,913
Treasury stock	(322,758)	(313,643)
Total REX shareholders’ equity	381,931	381,492
Noncontrolling interests	51,400	50,434
Total equity	433,331	431,926
Total liabilities and equity	$ 476,564	$ 478,864

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Net sales and revenue	$ 120,820	$ 113,143
Cost of sales	109,969	100,654
Gross profit	10,851	12,489
Selling, general and administrative expenses	(4,553)	(5,402)
Equity in income of unconsolidated affiliates	697	700
Interest and other income	654	215
Income before income taxes	7,649	8,002
Benefit (provision) for income taxes	2,703	(2,390)
Net income	10,352	5,612
Net income attributable to noncontrolling interests	(856)	(1,068)
Net income attributable to REX common shareholders	$ 9,496	$ 4,544
Weighted average shares outstanding – basic and diluted (in Shares)	6,571	6,593
Basic and diluted net income per share attributable to REX common shareholders (in Dollars per share)	$ 1.45	$ 0.69

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance, Beginning of Period at Jan. 31, 2017	$ 299	$ (313,838)	$ 145,767	$ 508,207	$ 47,839	$ 388,274
Balance, Beginning of Period (in Shares) at Jan. 31, 2017	29,853	23,292
Net income				4,544	1,068	5,612
Stock based compensation expense		$ 6	23			29
Stock options and related tax effects (in Shares)
Balance, End of Period at Apr. 30, 2017	$ 299	$ (313,832)	145,790	512,751	48,907	393,915
Balance, End of Period (in Shares) at Apr. 30, 2017	29,853	23,292
Balance, Beginning of Period at Jan. 31, 2018	$ 299	$ (313,643)	146,923	547,913	50,434	431,926
Balance, Beginning of Period (in Shares) at Jan. 31, 2018	29,853	23,287
Net income				9,496	856	10,352
Treasury stock acquired		$ (9,128)				(9,128)
Treasury stock acquired (in Shares)		126
Capital contributions					110	110
Stock based compensation expense		$ 13	58			71
Stock options and related tax effects (in Shares)
Balance, End of Period at Apr. 30, 2018	$ 299	$ (322,758)	$ 146,981	$ 557,409	$ 51,400	$ 433,331
Balance, End of Period (in Shares) at Apr. 30, 2018	29,853	23,413

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Cash flows from operating activities:
Net income including noncontrolling interests	$ 10,352	$ 5,612
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	5,920	4,934
Income from equity method investments	(697)	(700)
Accrued interest income	(341)
Deferred income tax	(2,271)	3
Stock based compensation expense	71	196
Gain on disposal of property and equipment	(8)
Changes in assets and liabilities:
Accounts receivable	(8,350)	2,705
Inventories	(5,333)	(3,370)
Other assets	(1,894)	(30)
Accounts payable, trade	1,011	(1,308)
Other liabilities	(1,980)	723
Net cash (used in) provided by operating activities	(3,520)	8,765
Cash flows from investing activities:
Capital expenditures	(3,061)	(5,905)
Purchase of short-term investment	(111,154)
Restricted investments and deposits	5	51
Other	6	6
Net cash used in investing activities	(114,204)	(5,848)
Cash flows from financing activities:
Treasury stock acquired	(8,586)
Capital contributions from minority investor	110
Net cash used in financing activities	(8,476)
Net (decrease) increase in cash, cash equivalents and restricted cash	(126,200)	2,917
Cash, cash equivalents and restricted cash, beginning of period	191,342	188,706
Cash, cash equivalents and restricted cash, end of period	65,142	191,623
Non cash investing activities – Accrued capital expenditures	142	1,284
Non cash financing activities – Stock awards accrued		167
Non cash financing activities – Accrued common stock repurchases	542
Reconciliation of total cash, cash equivalents and restricted cash:
Cash and cash equivalents	64,246	191,493
Restricted cash	$ 896	$ 130

Consolidated Condensed Financia

Consolidated Condensed Financial Statements	3 Months Ended
	Apr. 30, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	Note 1. Consolidated Condensed Financial Statements The consolidated condensed financial statements included in this report have been prepared by the Company, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission and include, in the opinion of management, all adjustments necessary to state fairly the information set forth therein. Any such adjustments were of a normal recurring nature. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been omitted pursuant to such rules and regulations, although the Company believes that the disclosures are adequate to make the information presented not misleading. Financial information as of January 31, 2018 included in these financial statements has been derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2018 (fiscal year 2017). It is suggested that these unaudited consolidated condensed financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended January 31, 2018. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the year. Basis of Consolidation – The consolidated condensed financial statements in this report include the operating results and financial position of REX American Resources Corporation and its wholly and majority owned subsidiaries. All intercompany balances and transactions have been eliminated. The Company consolidates the results of its four majority owned subsidiaries. The Company includes the results of operations of One Earth Energy, LLC (“One Earth”) in its Consolidated Condensed Statements of Operations on a delayed basis of one month as One Earth has a fiscal year end of December 31. Nature of Operations – In the third quarter of fiscal year 2017, the Company began reporting the results of its refined coal operation as a new segment as a result of the August 10, 2017 acquisition of an entity that operates a refined coal facility (see Note 4). Prior to the acquisition, the Company had one reportable segment, ethanol. Beginning with the third quarter of fiscal year 2017, the Company has two reportable segments: i) ethanol and by-products and ii) refined coal. Within the ethanol and by-products segment, the Company has equity investments in three ethanol limited liability companies, two of which are majority ownership interests. Within the refined coal segment, the Company has a majority equity interest in one refined coal limited liability company.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Apr. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Note 2. Accounting Policies The interim consolidated condensed financial statements have been prepared in accordance with the accounting policies described in the notes to the consolidated financial statements included in the Company’s fiscal year 2017 Annual Report on Form 10-K and the adoption of new accounting standards described at the end of this footnote. While management believes that the procedures followed in the preparation of interim financial information are reasonable, the accuracy of some estimated amounts is dependent upon facts that will exist or calculations that will be accomplished at fiscal year-end. Examples of such estimates include accrued liabilities, such as management bonuses, and the provision for income taxes. Any adjustments pursuant to such estimates during the quarter were of a normal recurring nature. Actual results could differ from those estimates. Revenue Recognition For ethanol and by-products segment sales, the Company recognizes sales of ethanol, distillers grains and non-food grade corn oil when obligations under the terms of the respective contracts with customers are satisfied. This occurs with the transfer of control of products, generally upon shipment from the ethanol plant or upon loading of the rail car used to transport the products. For refined coal segment sales, the Company recognizes sales of refined coal when obligations under the term of the contract with its customer are satisfied. This occurs when title and control of the product transfers to its customer, generally upon the coal leaving the refined coal plant. Refined coal sales are recorded net of the cost of coal as the Company purchases the coal feedstock from the customer to which refined coal is sold (after processing). Cost of Sales Cost of sales includes depreciation, costs of raw materials, inbound freight charges, purchasing and receiving costs, inspection costs, other distribution expenses, warehousing costs, plant management, certain compensations costs, and general facility overhead charges. Selling, General and Administrative Expenses The Company includes non-production related costs such as professional fees, selling charges and certain payroll in selling, general and administrative expenses. Financial Instruments Certain of the forward grain purchase and ethanol, distillers grains and non-food grade corn oil sale contracts are accounted for under the “normal purchases and normal sales” scope exemption of Accounting Standards Codification (“ASC”) 815, “ Derivatives and Hedging The Company uses derivative financial instruments (exchange-traded futures contracts) to manage a portion of the risk associated with changes in commodity prices, primarily related to corn. The Company monitors and manages this exposure as part of its overall risk management policy. As such, the Company seeks to reduce the potentially adverse effects that the volatility of these markets may have on its operating results. The Company may take hedging positions in these commodities as one way to mitigate risk. While the Company attempts to link its hedging activities to purchase and sales activities, there are situations in which these hedging activities can themselves result in losses. The Company does not hold or issue derivative financial instruments for trading or speculative purposes. The changes in fair value of these derivative financial instruments are recognized in current period earnings as the Company does not use hedge accounting. Income Taxes The Company applies an effective tax rate to interim periods that is consistent with the Company’s estimated annual effective tax rate as adjusted for discrete items impacting the interim periods. The Company’s estimated annual effective tax rate includes the impact of its refined coal operation and the expected federal income tax credits to be earned, beginning August 10, 2017, the date of the refined coal acquisition (see Note 4). Based on current projections, the Company has estimated that its annual effective tax rate for fiscal year 2018 will be a tax benefit of approximately 25-30%. The Company provides for deferred tax liabilities and assets for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. The Company provides for a valuation allowance if, based on the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company paid no income taxes nor received refunds of income taxes during the three months ended April 30, 2018 and 2017. As of April 30, 2018 and January 31, 2018, total unrecognized tax benefits were approximately $2.8 million and $2.0 million, respectively. Accrued penalties and interest were approximately $0.4 million and $0.4 million at April 30, 2018 and January 31, 2018, respectively. If the Company were to prevail on all unrecognized tax benefits recorded, the provision for income taxes would be reduced by approximately $2.8 million. In addition, the impact of penalties and interest would also benefit the effective tax rate. Interest and penalties associated with unrecognized tax benefits are recorded within income tax expense. On a quarterly basis, the Company accrues for the effects of open uncertain tax positions and the related potential penalties and interest. Inventories Inventories are carried at the lower of cost or market on a first-in, first-out basis. Inventory includes direct production costs and certain overhead costs such as depreciation, property taxes and utilities related to producing ethanol and related by-products and refined coal. Inventory is permanently written down for instances when cost exceeds estimated net realizable value; such write-downs are based primarily upon commodity prices as the market value of inventory is often dependent upon changes in commodity prices. There were no significant permanent write-downs of inventory at April 30, 2018 and January 31, 2018. Fluctuations in the write-down of inventory generally relate to the levels and composition of such inventory at a given point in time. The components of inventory are as follows as of the dates presented (amounts in thousands): April 30, January 31, Ethanol and other finished goods $ 8,985 $ 8,402 Work in process 2,917 2,824 Grain and other raw materials 14,186 9,529 Total $ 26,088 $ 20,755 Property and Equipment In accordance with ASC 360-10 “ Impairment or Disposal of Long-Lived Assets The Company tests for recoverability of an asset group by comparing its carrying amount to its estimated undiscounted future cash flows. If the carrying amount of an asset group exceeds its estimated undiscounted future cash flows, the Company recognizes an impairment charge for the amount by which the asset group’s carrying amount exceeds its fair value, if any. The Company generally determines the fair value of the asset group using a discounted cash flow model based on market participant assumptions (for income producing asset groups) or by obtaining appraisals based on the market approach and comparable market transactions (for non-income producing asset groups). Investments The method of accounting applied to long-term investments, whether consolidated, equity or cost, involves an evaluation of the significant terms of each investment that explicitly grant or suggest evidence of control or influence over the operations of the investee and also includes the identification of any variable interests in which the Company is the primary beneficiary. The Company accounts for investments in a limited liability company in which it has a less than 20% ownership interest using the equity method of accounting when the factors discussed in ASC 323, “ Investments-Equity Method and Joint Ventures The Company periodically evaluates its investments for impairment due to declines in market value considered to be other than temporary. Such impairment evaluations include general economic and company-specific evaluations. If the Company determines that a decline in market value is other than temporary, then a charge to earnings is recorded in the Consolidated Condensed Statements of Operations and a new cost basis in the investment is established. Short-term investments are considered held to maturity, and, therefore are carried at amortized historical cost. Comprehensive Income The Company has no components of other comprehensive income, and therefore, comprehensive income equals net income. Accounting Changes and Recently Issued Accounting Standards Effective February 1, 2018, the Company adopted the amended guidance in ASC Topic 606 “ Revenue from Contracts with Customers Effective February 1, 2018, the Company prospectively adopted Accounting Standards Update “ASU” 2016-15 “ Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments Effective February 1, 2018, the Company adopted ASU 2016-18 “ Statement of Cash Flows (Topic 230), Restricted Cash”. In February 2016, the FASB issued ASU 2016-02 “Leases”. This standard requires that virtually all leases will be recognized by lessees on their balance sheet as a right-of-use asset and a corresponding lease liability, including leases currently accounted for as operating leases. The Company will be required to adopt this standard effective February 1, 2019. The Company has not completed its analysis of the effect of adopting this guidance but it does expect the adoption of this guidance to have a material impact on its Consolidated Balance Sheet related to the right-of-use asset and lease obligation liability to be recognized upon adoption of this guidance. The related leases are currently accounted for as operating leases (see Note 5).

NET SALES AND REVENUE

NET SALES AND REVENUE	3 Months Ended
	Apr. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Note 3. Net Sales and Revenue On February 1, 2018, the Company adopted the amended guidance in ASC Topic 606, “ Revenue from Contracts with Customers The Company recognizes sales of products when obligations under the terms of the respective contracts with customers are satisfied. This occurs with the transfer of control of products, generally upon shipment from the ethanol plant or upon loading of the rail car used to transport the products. Revenue is measured as the amount of consideration expected to be received in exchange for transferring goods. Sales, value add and other taxes the Company collects concurrent with revenue producing activities are excluded from net sales and revenue. The majority of the Company’s sales have payment terms ranging from 5 to 10 days after transfer of control. The Company has determined that sales contracts do not generally include a significant financing component. The Company has not historically, and does not intend to, enter into sales contracts in which payment is due from a customer prior to transferring product to the customer. Thus, the Company does not record unearned revenue. The Company elected, pursuant to the new accounting guidance, to recognize the cost for shipping and handling activities that occur after the customer obtains control of the promised goods as fulfillment activities and not when performance obligations are met. The Company has also elected, pursuant to the new accounting guidance, to exclude sales and other taxes from net sales and revenue. See Note 17 for disaggregation of net sales and revenue by operating segment and by product.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	3 Months Ended
	Apr. 30, 2018
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Note 4. Business Combinations The impact on the combined results of operations of the Company and the refined coal entity, on a pro forma basis, as though the companies had been combined as of the beginning of fiscal year 2017, is as follows: Cost of sales would have increased by approximately $692,000 for the quarter ended April 30, 2017. This pro forma increase is a result of increased depreciation expense as if the refined coal entity was consolidated during the quarter ended April 30, 2017. Selling, general and administrative expenses would have increased by approximately $2,510,000 for the quarter ended April 30, 2017. These pro forma adjustments are a result of transaction costs occurring (on a pro forma basis) during the first quarter of fiscal year 2017. The provision for income taxes would have decreased by approximately $1,217,000 for the quarter ended April 30, 2017. Net income attributable to REX common shareholders would have decreased by approximately $1,893,000 for the quarter ended April 30, 2017. Basic and diluted net income per share attributable to REX common shareholders would have decreased by approximately $0.29 per share for the quarter ended April 30, 2017. The results of the Company’s refined coal operations (approximately $0.6 million of net sales and revenue and approximately $6.9 million of net income attributable to REX common shareholders, including the income tax benefit of estimated Section 45 credits to be earned) have been included in the consolidated financial statements subsequent to the acquisition date and are included in the Company’s refined coal segment. The purchase price was $12,049,000, which was paid in cash. The acquisition was recorded by allocating the total purchase price to the assets acquired, based on their estimated fair values at the acquisition date. The purchase price allocation is based on the final fair value assessment results of a valuation analysis. The income approach was used to determine the fair values of assets acquired. The following table summarizes the estimated fair values of the assets acquired at the acquisition date (amounts in thousands): Inventory $ 49 Property, plant and equipment 12,000 Total assets acquired and purchase price $ 12,049 Transaction costs totaled approximately $2.5 million during fiscal year 2017. The Company does not expect transaction costs from this acquisition to be significant for fiscal year 2018 and beyond.

LEASES

LEASES	3 Months Ended
	Apr. 30, 2018
Leases [Abstract]
Leases of Lessee Disclosure [Text Block]	Note 5. Leases At April 30, 2018, the Company has lease agreements, as lessee, for rail cars and a natural gas pipeline. All of the leases are accounted for as operating leases. The following table is a summary of future minimum rentals on such leases (amounts in thousands): Years Ended January 31, Minimum Remainder of 2019 $ 5,712 2020 6,151 2021 4,261 2022 3,629 2023 2,064 Thereafter 4,569 Total $ 26,386

FAIR VALUE

FAIR VALUE	3 Months Ended
	Apr. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Note 6. Fair Value The Company applies ASC 820, “ Fair Value Measurements and Disclosures” . This accounting standard defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company determines the fair market values of its financial instruments based on the fair value hierarchy established by ASC 820 which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair values which are provided below. The Company carries certain cash equivalents, investments and derivative instruments at fair value. The fair values of derivative assets and liabilities traded in the over-the-counter market are determined using quantitative models that require the use of multiple market inputs including interest rates, prices and indices to generate pricing and volatility factors, which are used to value the position. The predominance of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services. Estimation risk is greater for derivative asset and liability positions that are either option-based or have longer maturity dates where observable market inputs are less readily available or are unobservable, in which case interest rate, price or index scenarios are extrapolated in order to determine the fair value. The fair values of derivative assets and liabilities include adjustments for market liquidity, counterparty credit quality, the Company’s own credit standing and other specific factors, where appropriate. To ensure the prudent application of estimates and management judgment in determining the fair value of derivative assets and liabilities, investments and property and equipment, various processes and controls have been adopted, which include: (i) model validation that requires a review and approval for pricing, financial statement fair value determination and risk quantification; and (ii) periodic review and substantiation of profit and loss reporting for all derivative instruments. Financial assets and liabilities measured at fair value on a recurring basis at April 30, 2018 are summarized below (amounts in thousands): Level 1 Level 2 Level 3 Fair Value Forward purchase contract asset (1) $ — $ 378 $ — $ 378 Investment in cooperative (2) — — 333 333 Total assets $ — $ 378 $ 333 $ 711 Commodity futures (3) $ — $ 592 $ — $ 592 Forward purchase contract liability (4) — 436 — 436 Total liabilities $ — $ 1,028 $ — $ 1,028 Financial assets and liabilities measured at fair value on a recurring basis at January 31, 2018 are summarized below (amounts in thousands): Level 1 Level 2 Level 3 Fair Value Forward purchase contracts asset (1) $ — $ 72 $ — $ 72 Investment in cooperative (2) — — 333 333 Total assets $ — $ 72 $ 333 $ 405 Commodity futures (3) $ — $ 87 $ — $ 87 Forward purchase contract liability (4) — 34 — 34 Total liabilities $ — $ 121 $ — $ 121 (1) The forward purchase contract asset is included in “Prepaid expenses and other current assets” on the accompanying Consolidated Condensed Balance Sheets. (2) The investment in cooperative is included in “Other assets” on the accompanying Consolidated Condensed Balance Sheets. (3) Commodity futures are included in “Accrued expenses and other current liabilities” on the accompanying Consolidated Condensed Balance Sheets. (4) The forward purchase contract liability is included in “Accrued expenses and other current liabilities” on the accompanying Consolidated Condensed Balance Sheets. The Company determined the fair value of the investment in cooperative by using a discounted cash flow analysis on the expected cash flows. Inputs used in the analysis include the face value of the allocated equity amount, the projected term for repayment based upon a historical trend and a risk adjusted discount rate based on the expected compensation participants would demand because of the uncertainty of the future cash flows. The inherent risk and uncertainty associated with unobservable inputs could have a significant effect on the actual fair value of the investment. There were no assets measured at fair value on a non-recurring basis at April 30, 2018 or January 31, 2018. As discussed in Note 4, the Company estimated the fair values of refined coal assets acquired using the income approach. This estimated fair value is a level 3 measurement.

PROPERTY AND EQUIPMENT

PROPERTY AND EQUIPMENT	3 Months Ended
	Apr. 30, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	Note 7. Property and Equipment April 30, January 31, 2018 Land and improvements $ 21,095 $ 21,074 Buildings and improvements 23,277 23,272 Machinery, equipment and fixtures 289,633 288,832 Construction in progress 4,378 3,155 338,383 336,333 Less: accumulated depreciation (144,414 ) (138,506 ) Total $ 193,969 $ 197,827

OTHER ASSETS

OTHER ASSETS	3 Months Ended
	Apr. 30, 2018
Disclosure Text Block Supplement [Abstract]
Other Assets Disclosure [Text Block]	Note 8. Other Assets The components of other assets are as follows for the periods presented (amounts in thousands): April 30, 2018 January 31, 2018 Real estate taxes refundable $ 6,721 $ 6,719 Deposits — 5 Other 723 730 Total $ 7,444 $ 7,454 Real estate taxes refundable represent amounts due One Earth associated with refunds of previously paid taxes in connection with a tax increment financing arrangement with local taxing authorities. Deposits are with utility and other vendors.

ACCRUED EXPENSES AND OTHER CURR

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	3 Months Ended
	Apr. 30, 2018
Disclosure Text Block Supplement [Abstract]
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]	Note 9. Accrued Expenses and Other Current Liabilities The components of accrued expenses and other current liabilities are as follows for the periods presented (amounts in thousands): April 30, January 31, 2018 Accrued payroll and related items $ 1,822 $ 5,108 Accrued utility charges 2,202 2,639 Accrued real estate taxes 2,846 2,678 Accrued income taxes 68 61 Other 4,018 3,230 Total $ 10,956 $ 13,716

REVOLVING LINES OF CREDIT

REVOLVING LINES OF CREDIT	3 Months Ended
	Apr. 30, 2018
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Note 10. Revolving Lines of Credit Effective April 1, 2016, One Earth and NuGen Energy, LLC (“NuGen”) each entered into $10.0 million revolving loan facilities that mature June 1, 2019. Neither One Earth nor NuGen had outstanding borrowings on the revolving loans during the three months ended April 30, 2018 and 2017.

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	3 Months Ended
	Apr. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Note 11. Derivative Financial Instruments The Company is exposed to various market risks, including changes in commodity prices (raw materials and finished goods). To manage risks associated with the volatility of these natural business exposures, the Company enters into commodity agreements and forward purchase (corn) and sale (ethanol, distillers grains and non-food grade corn oil) contracts. The Company does not purchase or sell derivative financial instruments for trading or speculative purposes. The Company does not purchase or sell derivative financial instruments for which a lack of marketplace quotations would require the use of fair value estimation techniques. The following table provides information about the fair values of the Company’s derivative financial instruments (that are not accounted for under the “normal purchases and normal sales” scope exemption of ASC 815) and the line items on the Consolidated Condensed Balance Sheets in which the fair values are reflected (in thousands): Asset Derivatives Liability Derivatives April 30, January 31, April 30, January 31, Commodity futures (1) $ — $ — $ 592 $ 87 Forward purchase contracts (2) 378 72 436 34 Total $ 378 $ 72 $ 1,028 $ 121 (1) Commodity futures are included in accrued expenses and other current liabilities. These contracts are short/sell positions for approximately 6.2 million and 2.5 million bushels of corn at April 30, 2018 and January 31, 2018, respectively. (2) Forward purchase contracts assets are included in prepaid expenses and other current assets while forward purchase contracts liabilities are included in accrued expenses and other current liabilities. These contracts are for purchases of approximately 22.6 million and 11.7 million bushels of corn at April 30, 2018 and January 31, 2018, respectively. As of April 30, 2018, all of the derivative financial instruments held by the Company were subject to enforceable master netting arrangements. The Company’s accounting policy is to offset positions amounts owed or owing with the same counterparty. As of April 30, 2018, the gross positions of the enforceable master netting agreements are not significantly different from the net positions presented in the table above. Depending on the amount of an unrealized loss on a derivative contract held by the Company, the counterparty may require collateral to secure the Company’s derivative contract position. As of April 30, 2018, the Company was required to maintain collateral in the amount of approximately $896,000 to secure the Company’s derivative position. See Note 6 which contains fair value information related to derivative financial instruments. Losses on the Company’s derivative financial instruments of approximately $565,000 for the first quarter of fiscal year 2018 were included in cost of sales on the Consolidated Condensed Statements of Operations. Gains on the Company’s derivative financial instruments of approximately $124,000 for the first quarter of fiscal year 2017 were included in cost of sales on the Consolidated Condensed Statements of Operations. Gains on the Company’s derivative financial instruments of approximately $44,000 for the first quarter of fiscal year 2018 were included in net sales and revenue on the Consolidated Condensed Statements of Operations.

INVESTMENTS

INVESTMENTS	3 Months Ended
	Apr. 30, 2018
Investments Schedule [Abstract]
Investment [Text Block]	Note 12. Investments The following table summarizes the Company’s equity method investment at April 30, 2018 and January 31, 2018 (dollars in thousands): Entity Ownership Percentage Carrying Amount Carrying Amount Big River 10.3 % $ 35,246 $ 34,549 Undistributed earnings of the Company’s equity method investee totaled approximately $15.2 million and $14.5 million at April 30, 2018 and January 31, 2018, respectively. The Company did not receive dividends from its equity method investee in the first quarter of fiscal years 2018 or 2017. Summarized financial information for the Company’s equity method investee is presented in the following table for the periods presented (amounts in thousands): Three Months Ended 2018 2017 Net sales and revenue $ 191,943 $ 192,500 Gross profit $ 13,691 $ 8,181 Income from continuing operations $ 6,765 $ 7,206 Net income $ 6,765 $ 7,206 Big River has debt agreements that limit amounts Big River can pay in the form of dividends or advances to owners. The restricted net assets of Big River at April 30, 2018 and January 31, 2018 are approximately $214.1 million and $202.6 million, respectively.

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS	3 Months Ended
	Apr. 30, 2018
Disclosure Text Block Supplement [Abstract]
Compensation and Employee Benefit Plans [Text Block]	Note 13. Employee Benefits The Company maintains the REX 2015 Incentive Plan, approved by its shareholders, which reserves a total of 550,000 shares of common stock for issuance pursuant to its terms. The plan provides for the granting of shares of stock, including options to purchase shares of common stock, stock appreciation rights tied to the value of common stock, restricted stock, and restricted stock unit awards to eligible employees, non-employee directors and consultants. Since plan inception, the Company has only granted restricted stock awards. The Company measures share-based compensation grants at fair value on the grant date, adjusted for estimated forfeitures. The Company records noncash compensation expense related to liability and equity awards in its consolidated financial statements over the requisite service period on a straight-line basis. At April 30, 2018, 511,174 shares remain available for issuance under the Plan. As a component of their compensation, restricted stock has been granted to directors at the closing market price of REX common stock on the predetermined grant date. In addition one third of executives’ incentive compensation is payable by an award of restricted stock based on the then closing market price of REX common stock on the predetermined grant date. At April 30, and January 31, 2018, unrecognized compensation cost related to nonvested restricted stock was approximately $162,000 and $233,000, respectively. The following tables summarize non-vested restricted stock award activity for the three months ended April 30, 2018 and 2017: Three Months Ended April 30, 2018 Non-Vested Weighted Weighted Non-Vested at January 31, 2018 29,415 $ 2,275 2 Granted — — Forfeited — — Vested 672 50 Non-Vested at April 30, 2018 28,743 $ 2,225 2 Three Months Ended April 30, 2017 Non-Vested Weighted Weighted Non-Vested at January 31, 2017 23,350 $ 1,386 2 Granted — — Forfeited — — Vested — — Non-Vested at April 30, 2017 23,350 1,386 2 The above tables include 24,711 and 18,541 non-vested shares at April 30, 2018 and 2017, respectively, which are included in the number of weighted average shares outstanding used to determine basic and diluted earnings per share attributable to REX common shareholders. Such shares are treated, for accounting purposes, as being fully vested at the grant date as they were granted to recipients who were retirement eligible at the time of grant.

Income Taxes

Income Taxes	3 Months Ended
	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Note 14 . Income Taxes The effective tax rate on consolidated pre-tax income was (35.3) % for the three months ended April 30, 2018 and 29.9% for the three months ended April 30, 2017. The fluctuation in the rate results primarily from the production tax credits the Company expects to receive associated with its refined coal segment, lower tax rates as a result of the Tax Cuts and Jobs Act of 2017 (“the Tax Act”) and expected research and experimentation federal tax credits to be claimed and earned in fiscal year 2018. The Company records its tax provision/benefit based on an estimated annual effective rate adjusted for items recorded discretely. The estimated annual effective tax rate includes the impact of the refined coal operation and the expected federal income tax credits to be earned in fiscal year 2018. Based on current projections the Company estimates that its annual effective tax rate will result in a tax benefit of approximately 25-30%. The Tax Act signed into law on December 22, 2017, reduced the federal corporate income tax rate to 21% effective January 1, 2018. The Tax Act also made numerous other changes to the U.S. tax code, including, but not limited to, permitting full expensing of qualified property acquired after September 27, 2017, expanding prior limitations of the deductibility of certain executive compensation and eliminating the corporate alternative minimum tax. The SEC issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the tax effects of the Tax Act. In recognition of the inherent complexities associated with accounting for the effects of the Tax Act, SAB 118 provides a measurement period of up to one year from enactment of the Tax Act for companies to complete the accounting for the tax effects of the Tax Act. Although the Company’s accounting for the tax effects of the Tax Act are not yet complete, at January 31, 2018, the Company made a preliminary estimate of the effect of the tax rate reduction on the existing deferred tax balances and recorded a tax benefit of approximately $14,362,000 to remeasure the deferred tax liability at the new 21% rate. The Company will continue to refine the calculation as additional analysis is completed, which will include a final determination of the deferred tax balances at January 31, 2018 after the Company’s federal income tax return is filed, and as further guidance is provided by the Internal Revenue Service. Through its refined coal operation, the Company earns production tax credits pursuant to IRC Section 45. The credits can be used to reduce future income tax liabilities for up to 20 years. The Company files a U.S. federal income tax return and various state income tax returns. In general, the Company is no longer subject to U.S. federal, state or local income tax examinations by tax authorities for years ended January 31, 2013 and prior. A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (amounts in thousands): Three Months Ended 2018 2017 Unrecognized tax benefits, beginning of period $ 2,325 $ 2,096 Changes for prior years’ tax positions 809 147 Changes for current year tax positions — — Unrecognized tax benefits, end of period $ 3,134 $ 2,243 The Company expects to claim research and experimentation credits in the current year and certain prior years. In connection with this, the Company has increased the amount of unrecognized tax benefits.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Apr. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Note 15. Commitments and Contingencies The Company is involved in various legal actions arising in the normal course of business. After taking into consideration legal counsels’ evaluations of such actions, management is of the opinion that their outcome will not have a material adverse effect on the Company’s Consolidated Condensed Financial Statements. One Earth and NuGen have combined forward purchase contracts for approximately 23.9 million bushels of corn, the principal raw material for their ethanol plants. They expect to take delivery of the grain through October 2018. One Earth and NuGen have combined sales commitments for approximately 43.8 million gallons of ethanol, approximately 113,000 tons of distillers grains and approximately 17.4 million pounds of non-food grade corn oil. They expect to deliver a majority of the ethanol, distillers grains and non-food grade corn oil through October 2018. The refined coal entity has various agreements (site license, operating agreements, etc.) containing payment terms based upon production of refined coal under which the Company is required to pay various fees. These fees totaled approximately $1.8 million in the first three months of fiscal year 2018

Related-Party Transactions

Related-Party Transactions	3 Months Ended
	Apr. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	Note 16. Related-Party Transactions During the first quarters of fiscal years 2018 and 2017, One Earth and NuGen purchased approximately $46.1 million and approximately $42.3 million, respectively, of corn from minority equity investors and board members of those subsidiaries. The Company had amounts payable to related parties for corn purchases of approximately $1.3 million and $0.9 million at April 30, 2018 and January 31, 2018, respectively. During the first three months of fiscal year 2018, the Company recognized commission expense of approximately $0.1 million, payable to the minority investor in the refined coal entity. The Company did not recognize any commission expense during the first three months of fiscal year 2017. The commission expense is associated with the refined coal acquisition. The Company had accrued liabilities and accounts payable related to the commission expense of approximately $1.5 million at April 30, 2018 and January 31, 2018.

Segment Reporting

Segment Reporting	3 Months Ended
	Apr. 30, 2018
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	Note 17. Segment Reporting In the third quarter of fiscal year 2017, the Company began reporting the results of its refined coal operations as a new segment as a result of the refined coal acquisition (see Note 4.) The Company has two segments: ethanol and by-products and refined coal. Historical amounts have been reclassified to conform to the current year segment reporting presentation. The Company evaluates the performance of each reportable segment based on net income attributable to REX common shareholders. The following table summarizes segment and other results and assets (amounts in thousands): Three Months Ended April 30, 2018 2017 Net sales and revenue: Ethanol and by-products $ 120,680 $ 113,143 Refined coal 1 140 — Total net sales and revenue $ 120,820 $ 113,143 1 Segment gross profit (loss): Ethanol and by-products $ 13,546 $ 12,489 Refined coal (2,695 ) — Total gross profit $ 10,851 $ 12,489 Income (loss) before income taxes: Ethanol and by-products $ 11,009 $ 8,923 Refined coal (2,859 ) — Corporate and other (501 ) (921 ) Total income (loss) before income taxes $ 7,649 $ 8,002 Three Months Ended 2018 2017 Benefit (provision) for income taxes: Ethanol and by-products $ (1,420 ) $ (2,705 ) Refined coal 3,999 — Corporate and other 124 315 Total benefit (provision) for income taxes $ 2,703 $ (2,390 ) Segment profit (loss): Ethanol and by-products $ 8,589 $ 5,142 Refined coal 1,271 — Corporate and other (364 ) (598 ) Net income attributable to REX common shareholders $ 9,496 $ 4,544 April 30, January 31, 2018 Assets: Ethanol and by-products $ 397,198 $ 384,997 Refined coal 10,820 12,165 Corporate and other 68,546 81,702 Total assets $ 476,564 $ 478,864 Three Months Ended 2018 2017 Sales of products, ethanol and by-products segment: Ethanol $ 91,893 $ 91,472 Dried distillers grains 20,083 15,149 Non-food grade corn oil 4,980 4,593 Modified distillers grains 3,717 1,920 Other 7 9 Total $ 120,680 $ 113,143 Sales of products, refined coal segment: Refined coal $ 140 $ —

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies)	3 Months Ended
	Apr. 30, 2018
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	The interim consolidated condensed financial statements have been prepared in accordance with the accounting policies described in the notes to the consolidated financial statements included in the Company’s fiscal year 2017 Annual Report on Form 10-K and the adoption of new accounting standards described at the end of this footnote. While management believes that the procedures followed in the preparation of interim financial information are reasonable, the accuracy of some estimated amounts is dependent upon facts that will exist or calculations that will be accomplished at fiscal year-end. Examples of such estimates include accrued liabilities, such as management bonuses, and the provision for income taxes. Any adjustments pursuant to such estimates during the quarter were of a normal recurring nature. Actual results could differ from those estimates.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition For ethanol and by-products segment sales, the Company recognizes sales of ethanol, distillers grains and non-food grade corn oil when obligations under the terms of the respective contracts with customers are satisfied. This occurs with the transfer of control of products, generally upon shipment from the ethanol plant or upon loading of the rail car used to transport the products. For refined coal segment sales, the Company recognizes sales of refined coal when obligations under the term of the contract with its customer are satisfied. This occurs when title and control of the product transfers to its customer, generally upon the coal leaving the refined coal plant. Refined coal sales are recorded net of the cost of coal as the Company purchases the coal feedstock from the customer to which refined coal is sold (after processing).
Cost of Sales, Policy [Policy Text Block]	Cost of Sales Cost of sales includes depreciation, costs of raw materials, inbound freight charges, purchasing and receiving costs, inspection costs, other distribution expenses, warehousing costs, plant management, certain compensations costs, and general facility overhead charges.
Selling, General and Administrative Expenses, Policy [Policy Text Block]	Selling, General and Administrative Expenses The Company includes non-production related costs such as professional fees, selling charges and certain payroll in selling, general and administrative expenses.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Financial Instruments Certain of the forward grain purchase and ethanol, distillers grains and non-food grade corn oil sale contracts are accounted for under the “normal purchases and normal sales” scope exemption of Accounting Standards Codification (“ASC”) 815, “ Derivatives and Hedging The Company uses derivative financial instruments (exchange-traded futures contracts) to manage a portion of the risk associated with changes in commodity prices, primarily related to corn. The Company monitors and manages this exposure as part of its overall risk management policy. As such, the Company seeks to reduce the potentially adverse effects that the volatility of these markets may have on its operating results. The Company may take hedging positions in these commodities as one way to mitigate risk. While the Company attempts to link its hedging activities to purchase and sales activities, there are situations in which these hedging activities can themselves result in losses. The Company does not hold or issue derivative financial instruments for trading or speculative purposes. The changes in fair value of these derivative financial instruments are recognized in current period earnings as the Company does not use hedge accounting.
Income Tax, Policy [Policy Text Block]	Income Taxes The Company applies an effective tax rate to interim periods that is consistent with the Company’s estimated annual effective tax rate as adjusted for discrete items impacting the interim periods. The Company’s estimated annual effective tax rate includes the impact of its refined coal operation and the expected federal income tax credits to be earned, beginning August 10, 2017, the date of the refined coal acquisition (see Note 4). Based on current projections, the Company has estimated that its annual effective tax rate for fiscal year 2018 will be a tax benefit of approximately 25-30%. The Company provides for deferred tax liabilities and assets for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. The Company provides for a valuation allowance if, based on the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company paid no income taxes nor received refunds of income taxes during the three months ended April 30, 2018 and 2017. As of April 30, 2018 and January 31, 2018, total unrecognized tax benefits were approximately $2.8 million and $2.0 million, respectively. Accrued penalties and interest were approximately $0.4 million and $0.4 million at April 30, 2018 and January 31, 2018, respectively. If the Company were to prevail on all unrecognized tax benefits recorded, the provision for income taxes would be reduced by approximately $2.8 million. In addition, the impact of penalties and interest would also benefit the effective tax rate. Interest and penalties associated with unrecognized tax benefits are recorded within income tax expense. On a quarterly basis, the Company accrues for the effects of open uncertain tax positions and the related potential penalties and interest.
Inventory, Policy [Policy Text Block]	Inventories Inventories are carried at the lower of cost or market on a first-in, first-out basis. Inventory includes direct production costs and certain overhead costs such as depreciation, property taxes and utilities related to producing ethanol and related by-products and refined coal. Inventory is permanently written down for instances when cost exceeds estimated net realizable value; such write-downs are based primarily upon commodity prices as the market value of inventory is often dependent upon changes in commodity prices. There were no significant permanent write-downs of inventory at April 30, 2018 and January 31, 2018. Fluctuations in the write-down of inventory generally relate to the levels and composition of such inventory at a given point in time. The components of inventory are as follows as of the dates presented (amounts in thousands): April 30, January 31, Ethanol and other finished goods $ 8,985 $ 8,402 Work in process 2,917 2,824 Grain and other raw materials 14,186 9,529 Total $ 26,088 $ 20,755
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment In accordance with ASC 360-10 “ Impairment or Disposal of Long-Lived Assets The Company tests for recoverability of an asset group by comparing its carrying amount to its estimated undiscounted future cash flows. If the carrying amount of an asset group exceeds its estimated undiscounted future cash flows, the Company recognizes an impairment charge for the amount by which the asset group’s carrying amount exceeds its fair value, if any. The Company generally determines the fair value of the asset group using a discounted cash flow model based on market participant assumptions (for income producing asset groups) or by obtaining appraisals based on the market approach and comparable market transactions (for non-income producing asset groups).
Investment, Policy [Policy Text Block]	Investments The method of accounting applied to long-term investments, whether consolidated, equity or cost, involves an evaluation of the significant terms of each investment that explicitly grant or suggest evidence of control or influence over the operations of the investee and also includes the identification of any variable interests in which the Company is the primary beneficiary. The Company accounts for investments in a limited liability company in which it has a less than 20% ownership interest using the equity method of accounting when the factors discussed in ASC 323, “ Investments-Equity Method and Joint Ventures The Company periodically evaluates its investments for impairment due to declines in market value considered to be other than temporary. Such impairment evaluations include general economic and company-specific evaluations. If the Company determines that a decline in market value is other than temporary, then a charge to earnings is recorded in the Consolidated Condensed Statements of Operations and a new cost basis in the investment is established. Short-term investments are considered held to maturity, and, therefore are carried at amortized historical cost.
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income The Company has no components of other comprehensive income, and therefore, comprehensive income equals net income.
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Changes and Recently Issued Accounting Standards Effective February 1, 2018, the Company adopted the amended guidance in ASC Topic 606 “ Revenue from Contracts with Customers Effective February 1, 2018, the Company prospectively adopted Accounting Standards Update “ASU” 2016-15 “ Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments Effective February 1, 2018, the Company adopted ASU 2016-18 “ Statement of Cash Flows (Topic 230), Restricted Cash”. In February 2016, the FASB issued ASU 2016-02 “Leases”. This standard requires that virtually all leases will be recognized by lessees on their balance sheet as a right-of-use asset and a corresponding lease liability, including leases currently accounted for as operating leases. The Company will be required to adopt this standard effective February 1, 2019. The Company has not completed its analysis of the effect of adopting this guidance but it does expect the adoption of this guidance to have a material impact on its Consolidated Balance Sheet related to the right-of-use asset and lease obligation liability to be recognized upon adoption of this guidance. The related leases are currently accounted for as operating leases (see Note 5).

SUMMARY OF SIGNIFICANT ACCOUN24

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	3 Months Ended
	Apr. 30, 2018
Accounting Policies [Abstract]
Schedule of Inventory, Current [Table Text Block]	The components of inventory are as follows as of the dates presented (amounts in thousands): April 30, January 31, Ethanol and other finished goods $ 8,985 $ 8,402 Work in process 2,917 2,824 Grain and other raw materials 14,186 9,529 Total $ 26,088 $ 20,755

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	3 Months Ended
	Apr. 30, 2018
Business Combinations [Abstract]
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The following table summarizes the estimated fair values of the assets acquired at the acquisition date (amounts in thousands): Inventory $ 49 Property, plant and equipment 12,000 Total assets acquired and purchase price $ 12,049

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Apr. 30, 2018
Leases [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	At April 30, 2018, the Company has lease agreements, as lessee, for rail cars and a natural gas pipeline. All of the leases are accounted for as operating leases. The following table is a summary of future minimum rentals on such leases (amounts in thousands): Years Ended January 31, Minimum Remainder of 2019 $ 5,712 2020 6,151 2021 4,261 2022 3,629 2023 2,064 Thereafter 4,569 Total $ 26,386

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Apr. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Financial assets and liabilities measured at fair value on a recurring basis at April 30, 2018 are summarized below (amounts in thousands): Level 1 Level 2 Level 3 Fair Value Forward purchase contract asset (1) $ — $ 378 $ — $ 378 Investment in cooperative (2) — — 333 333 Total assets $ — $ 378 $ 333 $ 711 Commodity futures (3) $ — $ 592 $ — $ 592 Forward purchase contract liability (4) — 436 — 436 Total liabilities $ — $ 1,028 $ — $ 1,028 Level 1 Level 2 Level 3 Fair Value Forward purchase contracts asset (1) $ — $ 72 $ — $ 72 Investment in cooperative (2) — — 333 333 Total assets $ — $ 72 $ 333 $ 405 Commodity futures (3) $ — $ 87 $ — $ 87 Forward purchase contract liability (4) — 34 — 34 Total liabilities $ — $ 121 $ — $ 121 (1) The forward purchase contract asset is included in “Prepaid expenses and other current assets” on the accompanying Consolidated Condensed Balance Sheets. (2) The investment in cooperative is included in “Other assets” on the accompanying Consolidated Condensed Balance Sheets. (3) Commodity futures are included in “Accrued expenses and other current liabilities” on the accompanying Consolidated Condensed Balance Sheets. (4) The forward purchase contract liability is included in “Accrued expenses and other current liabilities” on the accompanying Consolidated Condensed Balance Sheets.

PROPERTY AND EQUIPMENT (Tables)

PROPERTY AND EQUIPMENT (Tables)	3 Months Ended
	Apr. 30, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	The components of property and equipment are as follows for the periods presented (amounts in thousands): April 30, January 31, 2018 Land and improvements $ 21,095 $ 21,074 Buildings and improvements 23,277 23,272 Machinery, equipment and fixtures 289,633 288,832 Construction in progress 4,378 3,155 338,383 336,333 Less: accumulated depreciation (144,414 ) (138,506 ) Total $ 193,969 $ 197,827

OTHER ASSETS (Tables)

OTHER ASSETS (Tables)	3 Months Ended
	Apr. 30, 2018
Disclosure Text Block Supplement [Abstract]
Schedule of Other Assets [Table Text Block]	The components of other assets are as follows for the periods presented (amounts in thousands): April 30, 2018 January 31, 2018 Real estate taxes refundable $ 6,721 $ 6,719 Deposits — 5 Other 723 730 Total $ 7,444 $ 7,454

ACCRUED EXPENSES AND OTHER CU30

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)	3 Months Ended
	Apr. 30, 2018
Disclosure Text Block Supplement [Abstract]
Other Current Liabilities [Table Text Block]	The components of accrued expenses and other current liabilities are as follows for the periods presented (amounts in thousands): April 30, January 31, 2018 Accrued payroll and related items $ 1,822 $ 5,108 Accrued utility charges 2,202 2,639 Accrued real estate taxes 2,846 2,678 Accrued income taxes 68 61 Other 4,018 3,230 Total $ 10,956 $ 13,716

DERIVATIVE FINANCIAL INSTRUME31

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Jan. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value [Table Text Block]	The following table provides information about the fair values of the Company’s derivative financial instruments (that are not accounted for under the “normal purchases and normal sales” scope exemption of ASC 815) and the line items on the Consolidated Condensed Balance Sheets in which the fair values are reflected (in thousands): Asset Derivatives Liability Derivatives April 30, January 31, April 30, January 31, Commodity futures (1) $ — $ — $ 592 $ 87 Forward purchase contracts (2) 378 72 436 34 Total $ 378 $ 72 $ 1,028 $ 121 (1) Commodity futures are included in accrued expenses and other current liabilities. These contracts are short/sell positions for approximately 6.2 million and 2.5 million bushels of corn at April 30, 2018 and January 31, 2018, respectively. (2) Forward purchase contracts assets are included in prepaid expenses and other current assets while forward purchase contracts liabilities are included in accrued expenses and other current liabilities. These contracts are for purchases of approximately 22.6 million and 11.7 million bushels of corn at April 30, 2018 and January 31, 2018, respectively.

INVESTMENTS (Tables)

INVESTMENTS (Tables)	3 Months Ended
	Apr. 30, 2018
Investments Schedule [Abstract]
Equity Method Investments [Table Text Block]	The following table summarizes the Company’s equity method investment at April 30, 2018 and January 31, 2018 (dollars in thousands): Entity Ownership Percentage Carrying Amount Carrying Amount Big River 10.3 % $ 35,246 $ 34,549
Schedule of Financial Information for Equity Method Investments [Table Text Block]	Summarized financial information for the Company’s equity method investee is presented in the following table for the periods presented (amounts in thousands): Three Months Ended 2018 2017 Net sales and revenue $ 191,943 $ 192,500 Gross profit $ 13,691 $ 8,181 Income from continuing operations $ 6,765 $ 7,206 Net income $ 6,765 $ 7,206

EMPLOYEE BENEFITS (Tables)

EMPLOYEE BENEFITS (Tables)	3 Months Ended
	Apr. 30, 2018
Disclosure Text Block Supplement [Abstract]
Nonvested Restricted Stock Shares Activity [Table Text Block]	The following tables summarize non-vested restricted stock award activity for the three months ended April 30, 2018 and 2017: Three Months Ended April 30, 2018 Non-Vested Weighted Weighted Non-Vested at January 31, 2018 29,415 $ 2,275 2 Granted — — Forfeited — — Vested 672 50 Non-Vested at April 30, 2018 28,743 $ 2,225 2 Three Months Ended April 30, 2017 Non-Vested Weighted Weighted Non-Vested at January 31, 2017 23,350 $ 1,386 2 Granted — — Forfeited — — Vested — — Non-Vested at April 30, 2017 23,350 1,386 2

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (amounts in thousands): Three Months Ended 2018 2017 Unrecognized tax benefits, beginning of period $ 2,325 $ 2,096 Changes for prior years’ tax positions 809 147 Changes for current year tax positions — — Unrecognized tax benefits, end of period $ 3,134 $ 2,243

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Apr. 30, 2018
Segment Reporting (Tables) [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following table summarizes segment and other results and assets (amounts in thousands): Three Months Ended April 30, 2018 2017 Net sales and revenue: Ethanol and by-products $ 120,680 $ 113,143 Refined coal 1 140 — Total net sales and revenue $ 120,820 $ 113,143 Segment gross profit (loss): Ethanol and by-products $ 13,546 $ 12,489 Refined coal (2,695 ) — Total gross profit $ 10,851 $ 12,489 Income (loss) before income taxes: Ethanol and by-products $ 11,009 $ 8,923 Refined coal (2,859 ) — Corporate and other (501 ) (921 ) Total income (loss) before income taxes $ 7,649 $ 8,002 Three Months Ended 2018 2017 Benefit (provision) for income taxes: Ethanol and by-products $ (1,420 ) $ (2,705 ) Refined coal 3,999 — Corporate and other 124 315 Total benefit (provision) for income taxes $ 2,703 $ (2,390 ) Segment profit (loss): Ethanol and by-products $ 8,589 $ 5,142 Refined coal 1,271 — Corporate and other (364 ) (598 ) Net income attributable to REX common shareholders $ 9,496 $ 4,544 Three Months Ended 2018 2017 Sales of products, ethanol and by-products segment: Ethanol $ 91,893 $ 91,472 Dried distillers grains 20,083 15,149 Non-food grade corn oil 4,980 4,593 Modified distillers grains 3,717 1,920 Other 7 9 Total $ 120,680 $ 113,143 Sales of products, refined coal segment: Refined coal $ 140 $ — 1
Assets [Member]
Segment Reporting (Tables) [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	April 30, January 31, 2018 Assets: Ethanol and by-products $ 397,198 $ 384,997 Refined coal 10,820 12,165 Corporate and other 68,546 81,702 Total assets $ 476,564 $ 478,864

Consolidated Condensed Financ36

Consolidated Condensed Financial Statements (Details)	3 Months Ended		12 Months Ended
	Apr. 30, 2018	Oct. 31, 2017	Jan. 31, 2019	Jan. 31, 2017
Consolidated Condensed Financial Statements (Details) [Line Items]
Number of Consolidated Subsidiaries	4
Number of Reportable Segments		2	2	1
Ethanol [Member]
Consolidated Condensed Financial Statements (Details) [Line Items]
Number of Operating Segments	3
Ethanol [Member] | Majority-Owned Subsidiary, Unconsolidated [Member]
Consolidated Condensed Financial Statements (Details) [Line Items]
Number of Operating Segments	2
Refined Coal [Member] | Majority-Owned Subsidiary, Unconsolidated [Member]
Consolidated Condensed Financial Statements (Details) [Line Items]
Number of Operating Segments	1

SUMMARY OF SIGNIFICANT ACCOUN37

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2019	Jan. 31, 2017	Feb. 01, 2018	Jan. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Income Taxes Paid	$ 0	$ 0
Proceeds from Income Tax Refunds	0	0
Unrecognized Tax Benefits	$ 2,800,000			$ 2,096,000	$ 2,000,000	$ 2,325,000
Property, Plant and Equipment, Depreciation Methods	Depreciation is computed using the straight-line method.
Cash and Cash Equivalents, Period Increase (Decrease)		$ 130,000		$ 130,000
Provision for Income Taxes [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Unrecognized Tax Benefits	$ 2,800,000
Cost of Sales [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting	20.00%
Minimum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(25.00%)		25.00%
Minimum [Member] | Building and Building Improvements [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	5
Minimum [Member] | Fixtures And Equipment [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	2
Maximum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(30.00%)		30.00%
Maximum [Member] | Building and Building Improvements [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	40 years
Maximum [Member] | Fixtures And Equipment [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	20 years
Customer Concentration Risk [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Income Tax Examination, Penalties and Interest Accrued	$ 400,000					$ 400,000

SUMMARY OF SIGNIFICANT ACCOUN38

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of Components of Inventory - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Schedule of Components of Inventory [Abstract]
Ethanol and other finished goods	$ 8,985	$ 8,402
Work in process	2,917	2,824
Grain and other raw materials	14,186	9,529
Total	$ 26,088	$ 20,755

BUSINESS COMBINATIONS (Details)

BUSINESS COMBINATIONS (Details) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018	Aug. 10, 2017
BUSINESS COMBINATIONS (Details) [Line Items]
Selling, General and Administrative Expense	$ 4,553,000	$ 5,402,000
Income Tax Expense (Benefit)	(2,703,000)	2,390,000
Net Income (Loss) Attributable to Parent	9,496,000	$ 4,544,000
Business Acquisition, Pro Forma Earnings Per Share, Basic (in Dollars per share)		$ 0.29
Business Acquisition, Pro Forma Earnings Per Share, Diluted (in Dollars per share)		$ 0.29
Business Acquisition, Pro Forma Revenue			$ 600,000
Business Acquisition, Pro Forma Net Income (Loss)			6,900,000
Payments to Acquire Businesses, Gross	12,049,000		12,049,000
Business Acquisition, Transaction Costs			$ 2,500,000
Refined Coal [Member]
BUSINESS COMBINATIONS (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent				95.35%
Income Tax Expense (Benefit)	$ (3,999,000)
Refined Coal [Member] | Pro Forma [Member]
BUSINESS COMBINATIONS (Details) [Line Items]
Costs and Expenses		$ 692,000
Selling, General and Administrative Expense		2,510,000
Income Tax Expense (Benefit)		1,217,000
Net Income (Loss) Attributable to Parent		$ 1,893,000

BUSINESS COMBINATIONS (Detail40

BUSINESS COMBINATIONS (Details) - Schedule of Estimated Fair Values of Assets Acquired at Acquisition Date - USD ($)	3 Months Ended	12 Months Ended
	Apr. 30, 2018	Jan. 31, 2018
Schedule of Estimated Fair Values of Assets Acquired at Acquisition Date [Abstract]
Inventory	$ 49,000
Property, plant and equipment	12,000,000
Total assets acquired and purchase price	$ 12,049,000	$ 12,049,000

LEASES (Details) - Schedule of

LEASES (Details) - Schedule of Future Minimum Rental Payments for Operating Leases $ in Thousands	Apr. 30, 2018USD ($)
Schedule of Future Minimum Rental Payments for Operating Leases [Abstract]
Remainder of 2019	$ 5,712
2,020	6,151
2,021	4,261
2,022	3,629
2,023	2,064
Thereafter	4,569
Total	$ 26,386

FAIR VALUE (Details) - Schedule

FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis - USD ($) $ in Thousands		Apr. 30, 2018	Jan. 31, 2018
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Forward purchase contracts asset (1)	[1]	$ 378	$ 72
Investment in cooperative (2)	[2]	333	333
Total assets		711	405
Commodity futures (3)	[3]	592	87
Forward purchase contract liability (4)	[4]	436	34
Total liabilities		1,028	121
Fair Value, Inputs, Level 1 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Forward purchase contracts asset (1)	[1]
Investment in cooperative (2)	[2]
Commodity futures (3)	[3]
Forward purchase contract liability (4)	[4]
Fair Value, Inputs, Level 2 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Forward purchase contracts asset (1)	[1]	378	72
Investment in cooperative (2)	[2]
Total assets		378	72
Commodity futures (3)	[3]	592	87
Forward purchase contract liability (4)	[4]	436	34
Total liabilities		1,028	121
Fair Value, Inputs, Level 3 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Forward purchase contracts asset (1)	[1]
Investment in cooperative (2)	[2]	333	333
Total assets		333	333
Commodity futures (3)	[3]
Forward purchase contract liability (4)	[4]
[1]	The forward purchase contract asset is included in "Prepaid expenses and other current assets" on the accompanying Consolidated Condensed Balance Sheets.
[2]	The investment in cooperative is included in "Other assets" on the accompanying Consolidated Condensed Balance Sheets.
[3]	Commodity futures are included in "Accrued expenses and other current liabilities" on the accompanying Consolidated Condensed Balance Sheets.
[4]	The forward purchase contract liability is included in "Accrued expenses and other current liabilities" on the accompanying Consolidated Condensed Balance Sheets.

PROPERTY AND EQUIPMENT (Details

PROPERTY AND EQUIPMENT (Details) - Schedule of Property and Equipment - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Schedule of Property and Equipment [Abstract]
Land and improvements	$ 21,095	$ 21,074
Buildings and improvements	23,277	23,272
Machinery, equipment and fixtures	289,633	288,832
Construction in progress	4,378	3,155
	338,383	336,333
Less: accumulated depreciation	(144,414)	(138,506)
Total	$ 193,969	$ 197,827

OTHER ASSETS (Details) - Schedu

OTHER ASSETS (Details) - Schedule of Other Assets - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Schedule of Other Assets [Abstract]
Real estate taxes refundable	$ 6,721	$ 6,719
Deposits		5
Other	723	730
Total	$ 7,444	$ 7,454

ACCRUED EXPENSES AND OTHER CU45

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - Schedule of accrued expenses and other current liabilities - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Schedule of accrued expenses and other current liabilities [Abstract]
Accrued payroll and related items	$ 1,822	$ 5,108
Accrued utility charges	2,202	2,639
Accrued real estate taxes	2,846	2,678
Accrued income taxes	68	61
Other	4,018	3,230
Total	$ 10,956	$ 13,716

REVOLVING LINES OF CREDIT (Deta

REVOLVING LINES OF CREDIT (Details) $ in Millions	3 Months Ended
	Apr. 30, 2018USD ($)
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 10
Debt Instrument, Maturity Date	Jun. 1, 2019

DERIVATIVE FINANCIAL INSTRUME47

DERIVATIVE FINANCIAL INSTRUMENTS (Details) bu in Millions	3 Months Ended	12 Months Ended
	Apr. 30, 2018USD ($)bu	Jan. 31, 2018USD ($)bu
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Debt Instrument, Collateral Amount	$ 896,000
Derivative, Loss on Derivative	565,000
Derivative, Gain on Derivative	$ 44,000	$ 124,000
Corn [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Forward Purchase Contracts, Quantity | bu	22.6	11.7
Corn [Member] | Short/Sell [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Commodity Futures, Quantity | bu	6.2	2.5

DERIVATIVE FINANCIAL INSTRUME48

DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments - USD ($) $ in Thousands		Apr. 30, 2018	Jan. 31, 2018
DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]
Asset Derivatives, Fair Value		$ 378	$ 72
Liability Derivatives, Fair Value		1,028	121
Commodity Contract [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]
Asset Derivatives, Fair Value	[1]
Liability Derivatives, Fair Value	[1]	592	87
Forward Contracts [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]
Asset Derivatives, Fair Value	[2]	378	72
Liability Derivatives, Fair Value	[2]	$ 436	$ 34
[1]	Commodity futures are included in accrued expenses and other current liabilities. These contracts are short/sell positions for approximately 6.2 million and 2.5 million bushels of corn at April 30, 2018 and January 31, 2018, respectively.
[2]	Forward purchase contracts assets are included in prepaid expenses and other current assets while forward purchase contracts liabilities are included in accrued expenses and other current liabilities. These contracts are for purchases of approximately 22.6 million and 11.7 million bushels of corn at April 30, 2018 and January 31, 2018, respectively.

INVESTMENTS (Details)

INVESTMENTS (Details) - USD ($)	Apr. 30, 2018	Jan. 31, 2018
INVESTMENTS (Details) [Line Items]
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	$ 214.1	$ 202,600,000
Big River [Member]
INVESTMENTS (Details) [Line Items]
Retained Earnings, Undistributed Earnings from Equity Method Investees	$ 15.2	$ 14,500,000

INVESTMENTS (Details) - Schedul

INVESTMENTS (Details) - Schedule of Equity Method Investments - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Schedule of Equity Method Investments [Abstract]
Big River	10.30%
Big River	$ 35,246	$ 34,549

INVESTMENTS (Details) - Sched51

INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net income	$ 9,496	$ 4,544
Big River [Member]
INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	191,943	192,500
Gross profit	13,691	8,181
Income from continuing operations	6,765	7,206
Net income	$ 6,765	$ 7,206

EMPLOYEE BENEFITS (Details)

EMPLOYEE BENEFITS (Details) - USD ($)	Apr. 30, 2018	Jan. 31, 2018	Apr. 30, 2017	Jan. 31, 2017	Jan. 30, 2017
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	28,743		23,350	29,415	23,350
Rex Shareholders [Member]
EMPLOYEE BENEFITS (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	$ 162,000	$ 233,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	24,711		18,541
Stock Option Plans 2015 [Member] | Employee Stock Option [Member]
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	550,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	511,174

EMPLOYEE BENEFITS (Details) - S

EMPLOYEE BENEFITS (Details) - Schedule of Non-Vested Restricted Stock Award Activity - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2017	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018
Schedule of Non-Vested Restricted Stock Award Activity [Abstract]
Non-Vested Shares, Beginning of Period		23,350		29,415	29,415
Weighted Average Grant Date Fair Value,Beginning of Period (in Dollars)		$ 1,386		$ 2,275	$ 2,275
Weighted Average Vesting Term, Beginning of Period	2 years	2 years		2 years	2 years
Non-Vested Shares, Granted
Weighted Average Grant Date Fair Value, Granted (in Dollars per share)
Non-Vested Shares, Forfeited
Weighted Average Grant Date Fair Value, Forfeited (in Dollars)
Non-Vested Shares, Vested			672
Weighted Average Grant Date Fair Value, Vested (in Dollars)			$ 50
Non-Vested Shares, End of Period	28,743	29,415	28,743	23,350
Weighted Average Grant Date Fair Value, End of Period (in Dollars)	$ 2,225	$ 2,275	$ 2,225	$ 1,386
Weighted Average Vesting Term, End of Period	2 years	2 years		2 years	2 years

Income Taxes (Details)

Income Taxes (Details) - USD ($)	Jan. 31, 2018	Jan. 01, 2018	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2019
Income Taxes (Details) [Line Items]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation, Percent			(35.30%)	29.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Deferred Other Tax Expense (Benefit) (in Dollars)	$ (14,362,000)
Minimum [Member]
Income Taxes (Details) [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Percent			(25.00%)		25.00%
Maximum [Member]
Income Taxes (Details) [Line Items]
Effective Income Tax Rate Reconciliation, Tax Credit, Percent			(30.00%)		30.00%
Refined Coal [Member]
Income Taxes (Details) [Line Items]
Tax Credit To Reduce Future Income Tax Liailibities Duration			20 years

Income Taxes (Details) - Schedu

Income Taxes (Details) - Schedule of Unrecognized Tax Benefits Roll Forward - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017
Schedule of Unrecognized Tax Benefits Roll Forward [Abstract]
Unrecognized tax benefits, beginning of period	$ 2,325	$ 2,096
Changes for prior years’ tax positions	809	147
Unrecognized tax benefits, end of period	$ 3,134	$ 2,243

Commitments and Contingencies (

Commitments and Contingencies (Details) lb in Millions, gal in Millions, bu in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2018USD ($)Tlbbugal
One Earth Energy And Nu Gen Energy [Member]
Commitments and Contingencies (Details) [Line Items]
Quantity of Bushels under Forward Purchase Contract | bu	23.9
Quantity of Ethanol under Sales Commitment | gal	43.8
Quantity of Distillers Grains Under Sales Commitment | T	113,000
Quantity of Non-food Grade Corn Oil Under Sales Commitments | lb	17.4
Supply Commitment Expected Period Of Delivery	They expect to deliver a majority of the ethanol,distillers grains and non-food grade corn oil through October 2018.
Refined Coal [Member]
Commitments and Contingencies (Details) [Line Items]
Fees Incurred By Subsidiary | $	$ 1.8

Related-Party Transactions (Det

Related-Party Transactions (Details) - USD ($)	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018
Related-Party Transactions (Details) [Line Items]
Accounts Payable, Related Parties, Current	$ 1,300,000		$ 900,000
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	100,000
Refined Coal [Member]
Related-Party Transactions (Details) [Line Items]
Accrued Liabilities for Commissions, Expense and Taxes	1,500,000
Refined Coal [Member]
Related-Party Transactions (Details) [Line Items]
Accrued Liabilities for Commissions, Expense and Taxes			$ 1,500,000
One Earth Energy And Nu Gen Energy [Member]
Related-Party Transactions (Details) [Line Items]
Costs and Expenses, Related Party	$ 46.1	$ 42,300,000

Segment Reporting (Details)

Segment Reporting (Details)	3 Months Ended	12 Months Ended
	Oct. 31, 2017	Jan. 31, 2019	Jan. 31, 2017
Segment Reporting [Abstract]
Number of Reportable Segments	2	2	1

Segment Reporting (Details) - S

Segment Reporting (Details) - Schedule Of Segment Results And Assets - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2018	Apr. 30, 2017
Segment Reporting Information [Line Items]
Net sales and revenue:		$ 120,820	$ 113,143
Segment gross profit (loss):		10,851	12,489
Income (loss) before income taxes:		7,649	8,002
Benefit (provision) for income taxes:		2,703	(2,390)
Segment profit (loss):		9,496	4,544
Sales of products, ethanol and by-products and refined coal segments:		120,680	113,143
Ethanol [Member]
Segment Reporting Information [Line Items]
Net sales and revenue:		120,680	113,143
Segment gross profit (loss):		13,546	12,489
Income (loss) before income taxes:		11,009	8,923
Benefit (provision) for income taxes:		(1,420)	(2,705)
Segment profit (loss):		8,589	5,142
Sales of products, ethanol and by-products and refined coal segments:		91,893	91,472
Refined Coal [Member]
Segment Reporting Information [Line Items]
Net sales and revenue:	[1]	140
Segment gross profit (loss):		(2,695)
Income (loss) before income taxes:		(2,859)
Benefit (provision) for income taxes:		3,999
Segment profit (loss):		1,271
Sales of products, ethanol and by-products and refined coal segments:		140
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income (loss) before income taxes:		(501)	(921)
Benefit (provision) for income taxes:		124	315
Segment profit (loss):		(364)	(598)
Dried Distillers Grains [Member]
Segment Reporting Information [Line Items]
Sales of products, ethanol and by-products and refined coal segments:		20,083	15,149
Non-Food Grade Corn Oil [Member]
Segment Reporting Information [Line Items]
Sales of products, ethanol and by-products and refined coal segments:		4,980	4,593
Modified Distillers Grains [Member]
Segment Reporting Information [Line Items]
Sales of products, ethanol and by-products and refined coal segments:		3,717	1,920
Other Segments [Member]
Segment Reporting Information [Line Items]
Sales of products, ethanol and by-products and refined coal segments:		$ 7	$ 9
[1]	The Company records sales in the refined coal segment net of the cost of coal as the Company purchases the coal feedstock from the customer to which refined coal is sold.

Segment Reporting (Details) -60

Segment Reporting (Details) - Schedule Of Segment Assets - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Segment Reporting Information [Line Items]
Assets	$ 476,564	$ 478,864
Ethanol [Member]
Segment Reporting Information [Line Items]
Assets	397,198	384,997
Refined Coal [Member]
Segment Reporting Information [Line Items]
Assets	10,820	12,165
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets	$ 68,546	$ 81,702