REX American Resources (REX) 10-K 1 Apr 20 2019 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Jan. 31, 2020	Mar. 28, 2020	Jul. 31, 2019
Document Information Line Items
Entity Registrant Name	REX AMERICAN RESOURCES Corp
Document Type	10-K
Current Fiscal Year End Date	--01-31
Entity Common Stock, Shares Outstanding		6,293,322
Entity Public Float			$ 416,091,198
Amendment Flag	false
Entity Central Index Key	0000744187
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jan. 31, 2020
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Interactive Data Current	Yes

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Jan. 31, 2020	Jan. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 179,658,000	$ 188,531,000
Restricted cash	1,113,000	281,000
Short-term investments	26,073,000	14,975,000
Accounts receivable	12,969,000	11,378,000
Inventory	35,634,000	18,477,000
Refundable income taxes	6,029,000	7,695,000
Prepaid expenses and other	9,659,000	9,284,000
Total current assets	271,135,000	250,621,000
Property and equipment - net	163,327,000	182,521,000
Operating lease right-of-use assets	16,173,000
Other assets	17,403,000	6,176,000
Equity method investments	32,464,000	32,075,000
TOTAL ASSETS	500,502,000	471,393,000
CURRENT LIABILITIES:
Accounts payable – trade (includes $0.7 million and $1.9 million with related related parties at January 31, 2020 and 2019, respectively)	18,900,000	7,463,000
Current operating lease liabilities	4,935,000
Accrued expenses and other current liabilities (includes $0.5 million and $1.6 million with related parties at January 31, 2020 and 2019, respectively)	7,764,000	9,546,000
Total current liabilities	31,599,000	17,009,000
LONG TERM LIABILITIES:
Deferred taxes	4,334,000	4,185,000
Long-term operating lease liabilities	10,688,000
Other long term liabilities	275,000	4,928,000
Total long term liabilities	15,297,000	9,113,000
EQUITY:
Common stock, 45,000 shares authorized, 29,853 shares issued at par	299,000	299,000
Paid in capital	148,789,000	148,273,000
Retained earnings	586,985,000	579,558,000
Treasury stock, 23,561 and 23,580 shares, respectively	(335,066,000)	(335,193,000)
Total REX shareholders’ equity	401,007,000	392,937,000
Noncontrolling interests	52,599,000	52,334,000
Total equity	453,606,000	445,271,000
TOTAL LIABILITIES AND EQUITY	$ 500,502,000	$ 471,393,000

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Accounts payable, related parties (in Dollars)	$ 700	$ 1,900
Accrued expenses, related parties (in Dollars)	$ 500	$ 1,600
Common stock, shares authorized	45,000	45,000
Common stock, shares issued	29,853	29,853
Treasury stock, shares	23,561	23,580

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Net sales and revenue	$ 418,034	$ 486,671	$ 452,586
Cost of sales (includes $171.5 million, $176.8 million and $154.5 million with related parties for the years ended January 31, 2020, 2019 and 2018, respectively)	405,549	456,456	408,425
Gross profit	12,485	30,215	44,161
Selling, general and administrative expenses (includes $(0.7) million, $0.8 million and $1.8 million with related parties for the years ended January 31, 2020 2019, and 2018, respectively)	(19,258)	(20,551)	(24,060)
Equity in income of unconsolidated affiliates	1,392	1,536	3,232
Interest and other income, net	4,212	3,388	2,060
(Loss) income before income taxes	(1,169)	14,588	25,393
Benefit for income taxes	12,813	22,922	19,519
Net income	11,644	37,510	44,912
Net income attributable to noncontrolling interests	(4,217)	(5,865)	(5,206)
Net income attributable to REX common shareholders	$ 7,427	$ 31,645	$ 39,706
Weighted average shares outstanding – basic and diluted (in Shares)	6,318	6,440	6,596
Basic and diluted net income per share attributable to REX common shareholders (in Dollars per share)	$ 1.18	$ 4.91	$ 6.02

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Cost of sales, related parties	$ 171,500	$ 176,800	$ 154,500
Selling, general, and administrative expenses, related parties	$ (700)	$ 800	$ 1,800

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2017	$ 299,000	$ (313,838,000)	$ 145,767,000	$ 508,207,000	$ 47,839,000	$ 388,274,000
Balance (in Shares) at Jan. 31, 2017	29,853,000	23,292,000
Net income				39,706,000	5,206,000	44,912,000
Capital contributions					918,000	918,000
Noncontrolling interests distribution and other					(3,529,000)	(3,529,000)
Stock options and related tax effects		$ 195,000	1,156,000			1,351,000
Stock options and related tax effects (in Shares)		(5,000)
Balance at Jan. 31, 2018	$ 299,000	$ (313,643,000)	146,923,000	547,913,000	50,434,000	431,926,000
Balance (in Shares) at Jan. 31, 2018	29,853,000	23,287,000
Net income				31,645,000	5,865,000	37,510,000
Capital contributions					524,000	524,000
Treasury stock acquired		$ (21,855,000)				$ (21,855,000)
Treasury stock acquired (in Shares)		305,000				305,473
Noncontrolling interests distribution and other					(4,489,000)	$ (4,489,000)
Stock options and related tax effects		$ 305,000	1,350,000			1,655,000
Stock options and related tax effects (in Shares)		(12,000)
Balance at Jan. 31, 2019	$ 299,000	$ (335,193,000)	148,273,000	579,558,000	52,334,000	445,271,000
Balance (in Shares) at Jan. 31, 2019	29,853,000	23,580,000
Net income				7,427,000	4,217,000	11,644,000
Capital contributions					312,000	$ 312,000
Treasury stock acquired (in Shares)						349,861
Noncontrolling interests distribution and other					(4,264,000)	$ (4,264,000)
Stock options and related tax effects		$ 127,000	516,000			643,000
Stock options and related tax effects (in Shares)		(19,000)
Balance at Jan. 31, 2020	$ 299,000	$ (335,066,000)	$ 148,789,000	$ 586,985,000	$ 52,599,000	$ 453,606,000
Balance (in Shares) at Jan. 31, 2020	29,853,000	23,561,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Jan. 31, 2020USD ($)	Jan. 31, 2019USD ($)	Jan. 31, 2018USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 11,644	$ 37,510	$ 44,912
Depreciation	23,007	24,828	21,462
Amortization of operating lease right-of-use assets	6,304
Stock based compensation expense	397	669	1,641
Income from equity method investments	(1,392)	(1,536)	(3,232)
Dividends received from equity method investments	1,003	4,010	6,516
Interest income from investments	(73)	(1,077)
Loss on sale of investment			13
Loss on disposal of real estate and property and equipment		104	192
Deferred income tax	(11,070)	(23,364)	(18,605)
Accounts receivable	(1,591)	1,535	(1,089)
Inventory	(17,157)	2,278	(3,649)
Prepaid expenses and other assets	(752)	5,217	(1,170)
Income taxes refundable	1,666	(1,083)	(5,542)
Accounts payable-trade	11,400	339	(1,705)
Accrued expenses and other liabilities	(13,043)	(1,499)	1,225
Net cash provided by operating activities	10,343	47,931	40,969
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(3,776)	(10,775)	(24,017)
Purchase of short-term investment	(26,025)	(125,989)
Sale of short-term investments	15,000	112,091
Acquisition of business, net of cash acquired			(12,049)
Proceeds from sale of investment			64
Proceeds from sale of real estate and property and equipment			104
Repayment of note receivable	369	27	26
Restricted investments and deposits		5	150
Net cash used in investing activities	(14,432)	(24,641)	(35,722)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments to noncontrolling interests holders	(4,264)	(4,489)	(3,529)
Capital contributions from minority investor	312	524	918
Treasury stock acquired		(21,855)
Net cash used in financing activities	(3,952)	(25,820)	(2,611)
NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(8,041)	(2,530)	2,636
CASH, CASH EQUIVALENTS AND RESTRICTED CASH-Beginning of year	188,812	191,342	188,706
CASH, CASH EQUIVALENTS AND RESTRICTED CASH-End of year	180,771	188,812	191,342
Non cash financing activities-Equity awards issued	487	1,473	1,195
Non cash financing activities-Equity awards accrued	241	487	1,485
Non cash investing activities-Accrued capital expenditures	37		1,149
Initial right-of-use assets and liabilities recorded upon adoption of ASC 842	20,918
Right-of-use assets acquired and liabilities incurred upon lease execution	432
Cash and cash equivalents	179,658	188,531	190,988
Restricted cash	1,113	281	354
Cash, cash equivalents and restricted cash, end of period	$ 180,771	$ 188,812	$ 191,342

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Jan. 31, 2020
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation – Fiscal Year – Segments In applying the criteria set forth in ASC 280, the Company determined that based on the nature of the products and production process and the expected financial results, the Company’s operations at its ethanol plants are aggregated into one reporting segment. Use of Estimates – Cash Equivalents – Basis of Presentation – Fiscal Year 2019 2018 2017 Interest income $ 4,120 $ 3,514 $ 1,556 Grant income — — 691 Loss on sale of investment — — (13 ) Loss on disposal of real estate and property and equipment, net — (104 ) (192 ) Other 92 (22 ) 18 Total $ 4,212 $ 3,388 $ 2,060 Concentrations of Risk – Inventory . January 31, 2020 2019 Ethanol and other finished goods $ 10,864 $ 5,767 Work in process 3,258 3,094 Grain and other raw materials 21,512 9,616 Total $ 35,634 $ 18,477 Property and Equipment – January 31, 2020 2019 Land and improvements $ 21,957 $ 21,469 Buildings and improvements 23,643 23,608 Machinery, equipment and fixtures 300,972 297,807 Construction in progress 193 708 346,765 343,592 Less: accumulated depreciation (183,438 ) (161,071 ) Total $ 163,327 $ 182,521 In accordance with ASC 360-05 “ Impairment or Disposal of Long-Lived Assets Impairment of Long-Lived Assets The Company reviews its long-lived assets, consisting of property and equipment, equity method investments and operating lease right-of-use assets, for impairment whenever events or changes in circumstances indicate the carrying amount of the asset may not be recoverable. The Company assesses long-lived assets for impairment by first determining the forecasted, undiscounted cash flows the asset group is expected to generate. If this total is less than the carrying value of the asset, the Company will then determine the fair value of the asset group. An impairment loss would be recognized in the amount by which the carrying amount of the asset exceeded the fair value of the asset. Significant management judgement is required to determine the fair value of long-lived assets, which includes discounted cash flows. Such estimates could be significantly affected by future changes in market conditions. The Company recorded no impairment charges in fiscal years 2019, 2018 and 2017. Depreciation expense was approximately $23,007,000, $24,828,000 and $21,462,000 in fiscal years 2019, 2018 and 2017, respectively. Investments – 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, in addition to persistent, declining market prices, 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 Statements of Operations and a new cost basis in the investment is established. Short-term investments, consisting of U.S. government obligations and certificates of deposit, are considered held-to-maturity, and, therefore are carried at amortized historical cost. Revenue Recognition 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. See Note 14 for disaggregation of net sales and revenue by operating segment and by product. Cost of Sales – SG&A Expenses – Financial Instruments 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 and ethanol. 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 sale 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. Stock Compensation Income Taxes Comprehensive Income New Accounting Pronouncements – eases In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-13, “Changes to Disclosure Requirements for Fair Value Measurements”, which improves the effectiveness of recurring and non-recurring fair value measurements disclosures. This standard removes, modifies and adds certain disclosure requirements and is effective for the Company beginning February 1, 2020.

INVESTMENTS

INVESTMENTS	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Investment [Text Block]	2. The Company's equity method investment in Big River is accounted for under ASC 323. The following table summarizes the investment (amounts in thousands): January 31, 2020 January 31, 2019 Carrying amount $ 32,464 $ 32,075 Ownership percentage 10.3 % 10.3 % The Company invested $20.0 million in Big River which is a holding company for several entities. Big River, through its various entities (both wholly and partially owned), operates four ethanol manufacturing facilities, that combined shipped approximately 424.6 million gallons of ethanol in the twelve months ended January 31, 2020. The Company recorded income of approximately $1.4 million, $1.5 million and $3.2 million as its share of earnings from Big River during fiscal years 2019, 2018 and 2017, respectively. The Company received dividends of approximately $1.0 million, $4.0 million and $6.5 million from Big River during fiscal years 2019, 2018 and 2017, respectively. At January 31, 2020, the carrying value of the investment in Big River is approximately $32.5 million; the amount of underlying equity in the net assets of Big River is approximately $27.7 million. Summarized financial information for the Company’s equity method investee as of and for its fiscal year end is presented in the following tables (amounts in thousands): December 31, 2019 2018 Current assets $ 146,494 $ 117,796 Non current assets 211,235 241,382 Total assets $ 357,729 $ 359,178 Current liabilities $ 55,552 $ 50,172 Long-term liabilities — 701 Total liabilities $ 55,552 $ 50,873 Noncontrolling interests $ 33,966 $ 34,149 Years Ended December 31, 2019 2018 2017 Net sales and revenue $ 823,718 $ 802,523 $ 817,112 Gross profit $ 30,774 $ 33,782 $ 60,259 Income from continuing operations $ 13,502 $ 14,893 $ 32,243 Net income $ 13,502 $ 14,893 $ 32,243 Big River has debt agreements that limit and restrict amounts the entity can pay in the form of dividends or advances to owners. The restricted net assets of Big River at January 31, 2020 are approximately $173.7 million; the Company’s proportionate share of restricted net assets of Big River is approximately $17.9 million. At January 31, 2020, the Company owned certificates of deposit that had an amortized cost, or carrying value, of approximately $26,073,000. The contractual maturity of these investments was less than one year. The yield to maturity rate was approximately 1.8%. Unrealized gains or losses were insignificant. At January 31, 2019, the Company owned a United States Treasury Bill that had an amortized cost, or carrying value, of approximately $14,975,000. The contractual maturity of this investment was less than one year. The yield to maturity rate was approximately 2.3%. Unrealized gains or losses were insignificant.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Jan. 31, 2020
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	3. BUSINESS COMBINATIONS On August 10, 2017, the Company, through a 95.35% owned subsidiary, purchased the entire ownership interest of an entity that owns a refined coal facility. The Company began operating its refined coal facility immediately after the acquisition. The Company expects that the refined coal operating results will be subsidized by federal production tax credits through November 2021, subject to meeting qualified emissions reductions and other requirements as governed by Section 45 of the Internal Revenue Code. The results of the Company’s refined coal operations (approximately $1.6 million of net sales and revenue and approximately $19.2 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. Pro forma net sales and revenue and net income attributable to REX common shareholders, had the acquisition occurred on February 1, 2017 would have been $452.6 million and $38.9 million, respectively for the year ended January 31, 2018. 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 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 and are included in SG&A expenses in the Consolidated Statement of Operations.

FAIR VALUE

FAIR VALUE	12 Months Ended
	Jan. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	4. FAIR VALUE The Company applies ASC 820, “ Fair Value Measurements and Disclosures 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 financial instruments at fair value. Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market, as well as certain U.S. Treasury securities that are highly liquid and are actively traded in over-the-counter markets. Level 2 – Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally or corroborated by observable market data. Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methods, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Unobservable inputs are developed based on the best information available, which may include the Company’s own data. 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. The fair values of property and equipment are determined by using various models that discount future expected cash flows. To ensure the prudent application of estimates and management judgment in determining the fair value of derivative assets and liabilities 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 at January 31, 2020 on a recurring basis are summarized below (amounts in thousands): Level 1 Level 2 Level 3 Total Commodity futures (1) $ — $ 352 $ — $ 352 Investment in cooperative (2) — — 341 341 Total assets $ — $ 352 $ 341 $ 693 Forward purchase contracts liability (3) $ — $ 230 $ — $ 230 Financial assets and liabilities measured at fair value at January 31, 2019 on a recurring basis are summarized below (amounts in thousands): Level 1 Level 2 Level 3 Total Fair Commodity futures (1) $ — $ 44 $ — $ 44 Investment in cooperative (2) — — 333 333 Total assets $ — $ 44 $ 333 $ 377 Forward purchase contracts liability (3) $ — $ 22 $ — $ 22 (1) The commodity futures asset is included in “Prepaid expenses and other” on the accompanying Consolidated Balance Sheets. (2) The investment in cooperative is included in “Other assets” on the accompanying Consolidated Balance Sheets. (3) The forward purchase contracts liability is included in “Accrued expenses and other current liabilities” on the accompanying Consolidated Balance Sheets. No other financial instruments were elected to be measured at fair value in accordance with ASC 470-20-25-21. There were no assets measured at fair value at January 31, 2020 and 2019 on a non-recurring basis. As discussed in Note 3, the Company estimated the fair values of refined coal assets acquired using the income approach. This estimated fair value is a level 3 measurement.

OTHER ASSETS

OTHER ASSETS	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Other Assets Disclosure [Text Block]	5. OTHER ASSETS The components of other noncurrent assets are as follows (amounts in thousands): January 31, 2020 2019 Deferred taxes $ 17,061 $ 5,843 Other 342 333 Total $ 17,403 $ 6,176

ACCRUED EXPENSES AND OTHER CURR

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]	6. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES The components of accrued expenses and other current liabilities at January 31, 2020 and 2019 are as follows (amounts in thousands): January 31, 2020 2019 Accrued payroll and related items $ 1,152 $ 2,041 Accrued utility charges 2,398 2,924 Accrued transportation related items 1,500 1,567 Accrued real estate taxes 1,755 1,680 Accrued income taxes 68 71 Other 891 1,263 Total $ 7,764 $ 9,546

LEASES

LEASES	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block [Abstract]
Leases of Lessee Disclosure [Text Block]	7. LEASES The Company used the optional transition method in adopting ASC 842, which resulted in applying ASC 842 at the date of adoption (February 1, 2019). Thus, comparative information has not been restated and continues to be reported under accounting standards in effect for those periods. ASC 842 provides for three practical expedients, which the Company elected as a package. Pursuant to this package, the Company did not reassess: i) whether any expired or existing contracts are or contain leases; ii) the lease classification for any expired or existing leases that were previously classified as operating leases; or iii) the initial direct costs for any existing leases. The Company elected the practical expedient, available pursuant to ASC 842, for lessees to include both lease and non-lease components as a single component and account for it as a lease. In general, certain maintenance costs are the responsibility of the Company under its railcar leases. These maintenance costs are a non-lease component which the Company elected to combine with rental payments and account for the total amount as operating lease expense. At January 31, 2020, the Company has lease agreements, as lessee, for railcars. All the leases are accounted for as operating leases. The lease agreements do not contain a specified implicit interest rate; therefore, the Company’s estimated incremental borrowing rate was used to determine the present value of future minimum lease payments. The exercise of any lease renewal is at the Company’s sole discretion. The lease term for all the Company's leases includes the noncancelable period of the lease and any periods covered by renewal options that the Company is reasonably certain to exercise. Certain leases include rent escalations pre-set in the agreements, which are factored into the lease payment stream. For fiscal year 2019, the components of lease expense, classified as SG&A expenses on the Consolidated Statement of Operations are as follows (amounts in thousands): Operating lease expense $ 6,526 Variable lease expense 556 Total lease expense $ 7,082 The following table is a summary of future minimum rentals on such leases at January 31, 2020 (amounts in thousands): Years Ended January 31, Minimum Rentals 2021 $ 5,668 2022 4,958 2023 3,251 2024 2,085 2025 1,228 Thereafter 29 Total 17,219 Less: present value discount 1,596 Operating lease liabilities $ 15,623 At January 31, 2020, the weighted average remaining lease term is 3.5 years and the weighted average discount rate is 5.46% for the above leases. Leases Years Ended January 31, Minimum Rentals 2020 $ 6,767 2021 5,487 2022 4,791 2023 3,208 2024 2,041 Thereafter 1,221 Total $ 23,515

COMMON STOCK

COMMON STOCK	12 Months Ended
	Jan. 31, 2020
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	8. COMMON STOCK During fiscal years 2019 and 2017, the Company did not purchase any of its common stock. During fiscal year 2018, the Company purchased 305,473 shares of its common stock for approximately $21,855,000. At January 31, 2020, the Company had prior authorization by its Board of Directors to purchase, in open market transactions, an additional 349,861 shares of its common stock. Information regarding the Company’s common stock is as follows (amounts in thousands): January 31, 2020 2019 Authorized shares 45,000 45,000 Issued shares 29,853 29,853 Outstanding shares 6,292 6,274

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	12 Months Ended
	Jan. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	9. 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 changes in fair value of these derivative financial instruments are recognized in current period earnings as the Company does not use hedge accounting. The following table provides information about the fair values of the Company’s derivative financial instruments and the line items on the Consolidated Balance Sheets in which the fair values are reflected (in thousands): Asset Derivatives Liability Derivatives Fair Value at Fair Value at 2020 2019 2020 2019 Commodity futures (1) $ 352 $ 44 $ — $ — Forward purchase contracts (2) $ — $ — $ 230 $ 22 (1) Commodity futures assets are included in prepaid expenses and other. These contracts are short/sell positions for approximately 3.7 million bushels of corn and long/buy positions for approximately 2.2 million bushels of corn at January 31, 2020. These contracts are short/sell positions for approximately 2.0 million bushels of corn at January 31, 2019. (2) Forward purchase contracts liabilities are included in accrued expenses and other current liabilities while forward purchase contracts assets are included in prepaid expenses and other. These contracts are for purchases of approximately 1.6 million bushels of corn at January 31, 2020 and 1.3 million bushels of corn at January 31, 2019. As of January 31, 2020, and 2019, 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 owed or owing with the same counterparty. As of January 31, 2020 and 2019, 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 January 31, 2020, the Company was required to maintain collateral with the counterparty in the amount of approximately $1,113,000 to secure the Company’s derivative liability position. See Note 4 which contains fair value information related to derivative financial instruments. The Company recognized gains (included in cost of sales) on derivative financial instruments of approximately $2,201,000, $2,698,000 and $1,317,000 in fiscal years 2019, 2018 and 2017, respectively.

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Compensation and Employee Benefit Plans [Text Block]	10. 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. 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 January 31, 2020, 479,988 shares remain available for issuance under the Plan. As a component of their compensation, restricted stock has been granted to directors at the market price of REX common stock on the date of the grant. In addition, one third of executives’ incentive compensation is payable by an award of restricted stock based on the then market price of REX common stock. The Company’s board of directors has determined that the grant date will be June 15 th At January 31, 2020 and 2019, unrecognized compensation cost related to nonvested restricted stock was approximately $220,000 and $200,000, respectively. The following table summarizes non-vested restricted stock award activity for fiscal years 2019, 2018 and 2017: 2019 Weighted Weighted Average Grant Average Remaining Non-Vested Date Fair Value VestingTerm Shares (000's) (in years) Non-Vested at January 31, 2019 38,036 $ 2,935 2 Granted 9,442 662 Forfeited — — Vested 18,902 1,404 Non-Vested at January 31, 2020 28,576 $ 2,193 2 2018 Weighted Weighted Average Grant Average Remaining Non-Vested Date Fair Value VestingTerm Shares (000's) (in years) Non-Vested at January 31, 2018 29,415 $ 2,275 2 Granted 21,744 1,623 Forfeited — — Vested 13,123 963 Non-Vested at January 31, 2019 38,036 $ 2,935 2 2017 Weighted Weighted Average Grant Remaining Vesting Non-Vested Date Fair Value Vesting Term Shares (000's) (in years) Non-Vested at January 31, 2017 23,350 $ 1,386 2 Granted 14,156 1,370 Forfeited — — Vested 8,091 481 Non-Vested at January 31, 2018 29,415 $ 2,275 2 The above tables include 24,219, 34,148 and 24,711 non-vested shares at January 31, 2020, 2019 and 2018, 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 officers who were retirement eligible at the time of grant.

COMMITMENTS

COMMITMENTS	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Commitments Disclosure [Text Block]	11. COMMITMENTS One Earth and NuGen have combined forward purchase contracts for approximately 12.1 million bushels of corn, the principal raw material for their ethanol plants. They expect to take delivery of a majority of the corn through April 2020. One Earth and NuGen have combined forward purchase contracts for approximately 2,500,000 MnBtu (million british thermal units) of natural gas. They expect to take delivery of a majority of the natural gas through July 2020. One Earth and NuGen have combined sales commitments for approximately 28.6 million gallons of ethanol, 107,000 tons of distillers grains and 16.0 million pounds of non-food grade corn oil. They expect to deliver the ethanol, distillers grains and corn oil through March 2020. One Earth has entered into an agreement with an unrelated party for the use of a portion of the party’s natural gas pipeline. The term of the original agreement was 10 years, and the amount was $4,380,000, which was paid over 120 equal monthly installments of $36,500 beginning in February 2009. A new 15-year agreement, with monthly payments of $29,250 was effective February 1, 2019. One Earth paid approximately $358,000 in fiscal year 2019 and approximately $438,000 pursuant to the agreement in each of fiscal years 2018 and 2017. One Earth and NuGen each have a contract with an unrelated party (“Distillers Grains Marketers”) for distillers grains marketing services. Under the terms of the contracts, the Distillers Grains Marketers will purchase all of One Earth's and NuGen’s distillers grains production during the term of the contracts. The contracts call for One Earth and NuGen to pay a fee per ton of distillers grains for the Distillers Grains Marketers’ services. The terms of the agreements are for one year and shall renew automatically for additional one-year terms, unless either party sends notice to the other party of its intent to terminate the agreement at least 90 days prior to the expiration of the then current term of the agreement. One Earth and NuGen combined incurred fees of approximately $936,000, $1,250,000 and $1,354,000 in fiscal years 2019, 2018 and 2017, respectively, for these marketing services. 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 $4,231,000, $9,927,000 and $5,468,000 in fiscal years 2019, 2018 and 2017, respectively.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	12. INCOME TAXES The (benefit) provision for income taxes for fiscal years 2019, 2018 and 2017 consist of the following (amounts in thousands): 2019 2018 2017 Federal: Current $ 752 $ 81 $ (2,094 ) Deferred (10,777 ) (23,547 ) (19,528 ) (10,025 ) (23,466 ) (21,622 ) State and Local: Current (2,495 ) 361 1,180 Deferred (293 ) 183 923 (2,788 ) 544 2,103 Benefit for income taxes $ (12,813 ) $ (22,922 ) $ (19,519 ) The tax effects of significant temporary differences representing deferred tax assets and liabilities are as follows (amounts in thousands): January 31, 2020 2019 Assets: General business credit carryforward $ 36,198 $ 26,523 Accrued liabilities 136 308 State net operating loss carryforward 366 294 Other items 230 647 Valuation allowance (232 ) (232 ) Total 36,698 27,540 Liabilities: Basis in pass through entities, including depreciation (23,823 ) (25,725 ) Other (148 ) (157 ) Total (23,971 ) (25,882 ) Net deferred tax asset $ 12,727 $ 1,658 The Company has a general business credit carryforward of approximately $36.2 million and approximately $26.5 million at January 31, 2020 and 2019, respectively. The Company can carry these credits forward for up to twenty years. The carryforward period begins to expire in fiscal year 2037. The Company has a valuation allowance of approximately $232,000 at January 31, 2020 and 2019. The Company decreased the valuation allowance by $9,000 and $176,000 in fiscal years 2018 and 2017, respectively. These adjustments to the valuation allowance are a result of estimates of realizing certain future state tax benefits. 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, and expanding prior limitations on the deductibility of certain executive compensation. 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 accounting for the tax effects of the Tax Act was 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 finalized its analysis in fiscal year 2018, and as a result, recorded a tax provision of approximately $272,000. 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. These credits increased the income tax benefit by approximately $9.0 million, $21.2 million and $11.5 million during fiscal years 2019, 2018 and 2017, respectively. During fiscal year 2019 and 2018, the company recognized an income tax benefit (net of uncertain tax position expense) of approximately $0.4 million and $4.6 million for federal and state research and experimentation credits. These credits recorded during fiscal year 2018 related to fiscal years 2014 to 2017 as well as an estimated tax benefit for fiscal year 2018. The Company paid income taxes of approximately $565,000, $855,000 and $6,920,000 in fiscal years 2019, 2018 and 2017, respectively. The Company received refunds of income taxes of approximately $11,000, $1,132,000 and $476,000 in fiscal years 2019, 2018 and 2017, respectively. Reconciliations of the federal statutory tax and the Company’s income tax (benefit) expense for fiscal years 2019, 2018 and 2017 are as follows (amounts in thousands): 2019 2018 2017 Federal income tax at statutory rate $ (245 ) $ 3,063 $ 8,583 State and local taxes, net of federal tax benefit (427 ) 811 822 Section 45 production tax credits (9,002 ) (21,144 ) (11,522 ) Research and experimentation credits (899 ) (11,362 ) — Tax Cuts and Jobs Act — 272 (14,362 ) Domestic production activities deduction — (62 ) (1,503 ) Uncertain tax positions (1,435 ) 6,872 361 Noncontrolling interest (1,035 ) (1,425 ) (1,927 ) Other 230 53 29 Total $ (12,813 ) $ (22,922 ) $ (19,519 ) The Company files a U.S. federal income tax return and income tax returns in various states. In general, the Company is no longer subject to U.S. federal, state or local income tax examinations by tax authorities for fiscal years ended January 31, 2014 and prior. The Company applies the provisions of ASC 740-10-25-5 for uncertain tax positions. As of January 31, 2020, total unrecognized tax benefits were approximately $7,353,000, and accrued penalties and interest were approximately $17,000. If the Company were to prevail on all unrecognized tax benefits recorded, the provision for income taxes would be reduced by approximately $7,299,000. 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 and annual basis, the Company accrues for the effects of open uncertain tax positions and the related potential penalties and interest. It is reasonably possible that the amount of the unrecognized tax benefit with respect to certain unrecognized tax positions will increase or decrease during the next 12 months; however, the Company does not expect the change to have a material effect on results of operations or financial position. A reconciliation of the beginning and ending amount of unrecognized tax benefits, including interest and penalties, is as follows (amounts in thousands): Fiscal Year 2019 2018 Unrecognized tax benefits, beginning of year $ 9,232 $ 2,325 Changes for tax positions for prior years (2,581 ) 5,973 Changes for tax positions for current year 719 934 Unrecognized tax benefits, end of year $ 7,370 $ 9,232

CONTINGENCIES

CONTINGENCIES	12 Months Ended
	Jan. 31, 2020
Loss Contingency [Abstract]
Contingencies Disclosure [Text Block]	13. CONTINGENCIES The Company is involved in various legal actions arising in the normal course of business. After taking into consideration legal counsels’ evaluation of such actions, management is of the opinion that their outcome will not have a material effect on the Company’s consolidated financial statements. There were no liabilities recorded at January 31, 2020 or 2019 as the Company did not believe that there was a probable and reasonably estimatable loss associated with any legal contingencies.

Segment Reporting

Segment Reporting	12 Months Ended
	Jan. 31, 2020
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	14. 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 3). 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 tables summarize segment and other results and assets (amounts in thousands): Fiscal Year 2019 2018 2017 Net sales and revenue: Ethanol and by-products $ 417,700 $ 485,885 $ 452,153 Refined coal 1 334 786 433 Total net sales and revenue $ 418,034 $ 486,671 $ 452,586 Segment gross profit (loss): Ethanol and by-products $ 20,402 $ 43,856 $ 51,509 Refined coal (7,917 ) (13,641 ) (7,348 ) Total gross profit $ 12,485 $ 30,215 $ 44,161 (Loss) income before income taxes: Ethanol and by-products $ 8,469 $ 31,545 $ 38,352 Refined coal (7,778 ) (15,204 ) (10,021 ) Corporate and other (1,860 ) (1,753 ) (2,938 ) Total (loss) income before income taxes $ (1,169 ) $ 14,588 $ 25,393 Benefit (provision) for income taxes: Ethanol and by-products $ 1,528 $ (2,343 ) $ 3,245 Refined coal 10,828 24,674 15,168 Corporate and other 457 591 1,106 Total benefit for income taxes $ 12,813 $ 22,922 $ 19,519 Segment profit (loss): Ethanol and by-products $ 5,439 $ 23,346 $ 35,880 Refined coal 3,391 10,148 5,628 Corporate and other (1,403 ) (1,849 ) (1,802 ) Net income attributable to REX $ 7,427 $ 31,645 $ 39,706 1 Sales in the refined coal segment are recorded net of the cost of coal as the Company purchases the coal feedstock from the customer to which refined coal is sold. Fiscal Year 2019 2018 2017 Sales of products, ethanol and by-products segment: Ethanol $ 321,434 $ 368,319 $ 359,239 Dried distillers grains 71,755 85,417 63,120 Non-food grade corn oil 17,135 20,097 21,195 Modified distillers grains 7,240 11,950 8,525 Other 136 102 74 Total sales $ 417,700 $ 485,885 $ 452,153 Sales of products, refined coal segment: Refined coal $ 334 $ 786 $ 433 Interest income: Ethanol and by-products $ 2,949 $ 2,460 $ 878 Refined coal — — — Corporate and other 1,171 1,054 678 Total interest income $ 4,120 $ 3,514 $ 1,556 Depreciation expense: Ethanol and by-products $ 20,182 $ 22,004 $ 20,037 Refined coal 2,790 2,784 1,385 Corporate and other 35 40 40 Total depreciation expense $ 23,007 $ 24,828 $ 21,462 Equity in income of unconsolidated affiliates: Ethanol and by-products $ 1,392 $ 1,536 $ 3,232 Refined coal — — — Corporate and other — — — Total equity in income of unconsolidated affiliates $ 1,392 $ 1,536 $ 3,232 January 31, Assets: 2020 2019 Ethanol and by-products $ 408,746 $ 393,691 Refined coal 6,101 8,625 Corporate and other 85,655 69,077 Total assets $ 500,502 $ 471,393 Additions to property and equipment: Ethanol and by-products $ 3,776 $ 10,697 Refined coal — 78 Corporate and other — — Total additions to property and equipment $ 3,776 $ 10,775 All of the Company’s sales are in the domestic market. The Company’s customers make all decisions with regard to where products they purchase from the Company are distributed.

QUARTERLY UNAUDITED INFORMATION

QUARTERLY UNAUDITED INFORMATION	12 Months Ended
	Jan. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	15. QUARTERLY UNAUDITED INFORMATION The following tables set forth the Company’s net sales and revenue, gross profit, net income and net income per share (basic and diluted) for each quarter during the last two fiscal years. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Quarters Ended (In Thousands, Except Per Share Amounts) April 30, July 31, October 31, January 31, 2019 2019 2019 2020 Net sales and revenue $ 104,575 $ 105,868 $ 86,671 $ 120,920 Gross profit (loss) 3,646 4,004 (1,758 ) 6,593 Net income (loss) 3,715 3,353 (1,673 ) 6,249 Net income (loss) attributable to REX common shareholders 2,821 2,256 (2,052 ) 4,402 Basic and diluted net income (loss) per share attributable to REX common shareholders (a) $ 0.45 $ 0.36 $ (0.32 ) $ 0.70 Quarters Ended April 30, July 31, October 31, January 31, 2018 2018 2018 2019 Net sales and revenue $ 120,820 $ 128,757 $ 123,750 $ 113,344 Gross profit 10,851 9,399 7,747 2,218 Net income 10,352 10,490 13,769 2,899 Net income attributable to REX common shareholders 9,496 9,217 11,875 1,057 Basic and diluted net income per share attributable to REX common shareholders $ 1.45 $ 1.43 $ 1.86 $ 0.17 a) The total of the quarterly net income per share amounts do not equal the annual net income per share amounts due to the impact of varying amounts of shares outstanding during the year.

RELATED PARTIES

RELATED PARTIES	12 Months Ended
	Jan. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	16. RELATED PARTIES During fiscal years 2019, 2018 and 2017, One Earth and NuGen purchased approximately $171.5 million, $176.8 million and $154.5 million, respectively, of corn (and other supplies) from minority equity investors. The Company had amounts payable to related parties for corn purchases of approximately $0.7 million and $1.9 million at January 31, 2020 and 2019, respectively. During fiscal years 2019, 2018 and 2017, the Company recognized commission expense of approximately ($0.7) million, $0.8 million and $1.8 million, respectively, payable to the minority investor in the refined coal entity. The commission expense is associated with the refined coal acquisition. The Company had accrued liabilities related to the commission expense of approximately $0.5 million and approximately $1.6 million at January 31, 2020 and 2019, respectively. During fiscal years 2019 and 2018, the Company received approximately $0.3 million and approximately $0.5 million, respectively, in capital contributions from the minority investor in the refined coal entity.

SUBSEQUENT EVENT

SUBSEQUENT EVENT	12 Months Ended
	Jan. 31, 2020
Subsequent Events [Abstract]
Subsequent Events [Text Block]	17. SUBSEQUENT EVENT During the early months of 2020, a new strain of COVID-19 spread into the United States and other countries. In an effort to contain the spread of this virus, there have been various government mandated restrictions, in addition to voluntary privately implemented restrictions, including limiting public gatherings, retail store closures, restrictions on employees working and the quarantining of people who may have been exposed to the virus. The duration of the resulting downturn in economic activity is unknown both on a macro and a micro level and has led to historically low ethanol pricing such that it is currently unprofitable to operate the Company’s ethanol plants at such levels. Consequently, the Company has idled its NuGen and One Earth ethanol plants.

Schedule II - VALUATION AND QUA

Schedule II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Jan. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	REX AMERICAN RESOURCES CORPORATION AND SUBSIDIARIES Schedule II - VALUATION AND QUALIFYING ACCOUNTS FOR THE YEARS ENDED JANUARY 31, 2020, 2019 AND 2018 (Amounts in thousands) Additions Deductions Balance Charged to Charges for Balance 2020: Deferred tax valuation allowance $ 232 $ — $ — $ 232 2019: Deferred tax valuation allowance $ 241 $ — $ 9 $ 232 2018: Deferred tax valuation allowance $ 417 $ — $ 176 $ 241

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies)	12 Months Ended
	Jan. 31, 2020
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of Consolidation –
Fiscal Period, Policy [Policy Text Block]	Fiscal Year –
Segment Reporting, Policy [Policy Text Block]	Segments In applying the criteria set forth in ASC 280, the Company determined that based on the nature of the products and production process and the expected financial results, the Company’s operations at its ethanol plants are aggregated into one reporting segment.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates –
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents –
Business Description and Basis of Presentation [Text Block]	Basis of Presentation – Fiscal Year 2019 2018 2017 Interest income $ 4,120 $ 3,514 $ 1,556 Grant income — — 691 Loss on sale of investment — — (13 ) Loss on disposal of real estate and property and equipment, net — (104 ) (192 ) Other 92 (22 ) 18 Total $ 4,212 $ 3,388 $ 2,060
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentrations of Risk –
Inventory, Policy [Policy Text Block]	Inventory . January 31, 2020 2019 Ethanol and other finished goods $ 10,864 $ 5,767 Work in process 3,258 3,094 Grain and other raw materials 21,512 9,616 Total $ 35,634 $ 18,477
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment – January 31, 2020 2019 Land and improvements $ 21,957 $ 21,469 Buildings and improvements 23,643 23,608 Machinery, equipment and fixtures 300,972 297,807 Construction in progress 193 708 346,765 343,592 Less: accumulated depreciation (183,438 ) (161,071 ) Total $ 163,327 $ 182,521 In accordance with ASC 360-05 “ Impairment or Disposal of Long-Lived Assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets The Company reviews its long-lived assets, consisting of property and equipment, equity method investments and operating lease right-of-use assets, for impairment whenever events or changes in circumstances indicate the carrying amount of the asset may not be recoverable. The Company assesses long-lived assets for impairment by first determining the forecasted, undiscounted cash flows the asset group is expected to generate. If this total is less than the carrying value of the asset, the Company will then determine the fair value of the asset group. An impairment loss would be recognized in the amount by which the carrying amount of the asset exceeded the fair value of the asset. Significant management judgement is required to determine the fair value of long-lived assets, which includes discounted cash flows. Such estimates could be significantly affected by future changes in market conditions. The Company recorded no impairment charges in fiscal years 2019, 2018 and 2017. Depreciation expense was approximately $23,007,000, $24,828,000 and $21,462,000 in fiscal years 2019, 2018 and 2017, respectively.
Investment, Policy [Policy Text Block]	Investments – 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, in addition to persistent, declining market prices, 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 Statements of Operations and a new cost basis in the investment is established. Short-term investments, consisting of U.S. government obligations and certificates of deposit, are considered held-to-maturity, and, therefore are carried at amortized historical cost.
Revenue [Policy Text Block]	Revenue Recognition 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. See Note 14 for disaggregation of net sales and revenue by operating segment and by product.
Cost of Goods and Service [Policy Text Block]	Cost of Sales –
Selling, General and Administrative Expenses, Policy [Policy Text Block]	SG&A Expenses –
Fair Value of Financial Instruments, Policy [Policy Text Block]	Financial Instruments 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 and ethanol. 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 sale 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.
Share-based Payment Arrangement, Director [Policy Text Block]	Stock Compensation
Income Tax, Policy [Policy Text Block]	Income Taxes
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income
New Accounting Pronouncements, Policy [Policy Text Block]	New Accounting Pronouncements – eases In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-13, “Changes to Disclosure Requirements for Fair Value Measurements”, which improves the effectiveness of recurring and non-recurring fair value measurements disclosures. This standard removes, modifies and adds certain disclosure requirements and is effective for the Company beginning February 1, 2020.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Jan. 31, 2020
Accounting Policies [Abstract]
Interest and Other Income [Table Text Block]	Interest and other income, net includes the following (amounts in thousands): Fiscal Year 2019 2018 2017 Interest income $ 4,120 $ 3,514 $ 1,556 Grant income — — 691 Loss on sale of investment — — (13 ) Loss on disposal of real estate and property and equipment, net — (104 ) (192 ) Other 92 (22 ) 18 Total $ 4,212 $ 3,388 $ 2,060
Schedule of Inventory, Current [Table Text Block]	The components of inventory are as follows (amounts in thousands): January 31, 2020 2019 Ethanol and other finished goods $ 10,864 $ 5,767 Work in process 3,258 3,094 Grain and other raw materials 21,512 9,616 Total $ 35,634 $ 18,477
Property, Plant and Equipment [Table Text Block]	The components of property and equipment are as follows (amounts in thousands): January 31, 2020 2019 Land and improvements $ 21,957 $ 21,469 Buildings and improvements 23,643 23,608 Machinery, equipment and fixtures 300,972 297,807 Construction in progress 193 708 346,765 343,592 Less: accumulated depreciation (183,438 ) (161,071 ) Total $ 163,327 $ 182,521

INVESTMENTS (Tables)

INVESTMENTS (Tables)	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Equity Method Investments [Table Text Block]	The following table summarizes the investment (amounts in thousands): January 31, 2020 January 31, 2019 Carrying amount $ 32,464 $ 32,075 Ownership percentage 10.3 % 10.3 %
Condensed Balance Sheet [Table Text Block]	Summarized financial information for the Company’s equity method investee as of and for its fiscal year end is presented in the following tables (amounts in thousands): December 31, 2019 2018 Current assets $ 146,494 $ 117,796 Non current assets 211,235 241,382 Total assets $ 357,729 $ 359,178 Current liabilities $ 55,552 $ 50,172 Long-term liabilities — 701 Total liabilities $ 55,552 $ 50,873 Noncontrolling interests $ 33,966 $ 34,149
Schedule of Financial Information for Equity Method Investments [Table Text Block]	Years Ended December 31, 2019 2018 2017 Net sales and revenue $ 823,718 $ 802,523 $ 817,112 Gross profit $ 30,774 $ 33,782 $ 60,259 Income from continuing operations $ 13,502 $ 14,893 $ 32,243 Net income $ 13,502 $ 14,893 $ 32,243

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	12 Months Ended
	Jan. 31, 2020
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

FAIR VALUE (Tables)

FAIR VALUE (Tables)	12 Months Ended
	Jan. 31, 2020
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 at January 31, 2020 on a recurring basis are summarized below (amounts in thousands): Level 1 Level 2 Level 3 Total Commodity futures (1) $ — $ 352 $ — $ 352 Investment in cooperative (2) — — 341 341 Total assets $ — $ 352 $ 341 $ 693 Forward purchase contracts liability (3) $ — $ 230 $ — $ 230 Level 1 Level 2 Level 3 Total Fair Commodity futures (1) $ — $ 44 $ — $ 44 Investment in cooperative (2) — — 333 333 Total assets $ — $ 44 $ 333 $ 377 Forward purchase contracts liability (3) $ — $ 22 $ — $ 22 (1) The commodity futures asset is included in “Prepaid expenses and other” on the accompanying Consolidated Balance Sheets. (2) The investment in cooperative is included in “Other assets” on the accompanying Consolidated Balance Sheets. (3) The forward purchase contracts liability is included in “Accrued expenses and other current liabilities” on the accompanying Consolidated Balance Sheets.

OTHER ASSETS (Tables)

OTHER ASSETS (Tables)	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Schedule of Other Assets [Table Text Block]	The components of other noncurrent assets are as follows (amounts in thousands): January 31, 2020 2019 Deferred taxes $ 17,061 $ 5,843 Other 342 333 Total $ 17,403 $ 6,176

ACCRUED EXPENSES AND OTHER CU_2

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Other Current Liabilities [Table Text Block]	The components of accrued expenses and other current liabilities at January 31, 2020 and 2019 are as follows (amounts in thousands): January 31, 2020 2019 Accrued payroll and related items $ 1,152 $ 2,041 Accrued utility charges 2,398 2,924 Accrued transportation related items 1,500 1,567 Accrued real estate taxes 1,755 1,680 Accrued income taxes 68 71 Other 891 1,263 Total $ 7,764 $ 9,546

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Jan. 31, 2020
LEASES (Tables) [Line Items]
Lease, Cost [Table Text Block]	For fiscal year 2019, the components of lease expense, classified as SG&A expenses on the Consolidated Statement of Operations are as follows (amounts in thousands): Operating lease expense $ 6,526 Variable lease expense 556 Total lease expense $ 7,082
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The following table is a summary of future minimum rentals on such leases at January 31, 2020 (amounts in thousands): Years Ended January 31, Minimum Rentals 2021 $ 5,668 2022 4,958 2023 3,251 2024 2,085 2025 1,228 Thereafter 29 Total 17,219 Less: present value discount 1,596 Operating lease liabilities $ 15,623
3743 Railroad Equipment [Member]
LEASES (Tables) [Line Items]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	At January 31, 2019 the Company had operating lease agreements (pursuant to ASC 840, “Leases”), as lessee for railcars and other equipment. At January 31, 2019, future minimum annual rentals on such leases were as follows (amounts in thousands): Years Ended January 31, Minimum Rentals 2020 $ 6,767 2021 5,487 2022 4,791 2023 3,208 2024 2,041 Thereafter 1,221 Total $ 23,515

COMMON STOCK (Tables)

COMMON STOCK (Tables)	12 Months Ended
	Jan. 31, 2020
Stockholders' Equity Note [Abstract]
Schedule of Stock by Class [Table Text Block]	Information regarding the Company’s common stock is as follows (amounts in thousands): January 31, 2020 2019 Authorized shares 45,000 45,000 Issued shares 29,853 29,853 Outstanding shares 6,292 6,274

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Jan. 31, 2020
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 and the line items on the Consolidated Balance Sheets in which the fair values are reflected (in thousands): Asset Derivatives Liability Derivatives Fair Value at Fair Value at 2020 2019 2020 2019 Commodity futures (1) $ 352 $ 44 $ — $ — Forward purchase contracts (2) $ — $ — $ 230 $ 22 (1) Commodity futures assets are included in prepaid expenses and other. These contracts are short/sell positions for approximately 3.7 million bushels of corn and long/buy positions for approximately 2.2 million bushels of corn at January 31, 2020. These contracts are short/sell positions for approximately 2.0 million bushels of corn at January 31, 2019. (2) Forward purchase contracts liabilities are included in accrued expenses and other current liabilities while forward purchase contracts assets are included in prepaid expenses and other. These contracts are for purchases of approximately 1.6 million bushels of corn at January 31, 2020 and 1.3 million bushels of corn at January 31, 2019.

EMPLOYEE BENEFITS (Tables)

EMPLOYEE BENEFITS (Tables)	12 Months Ended
	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Nonvested Restricted Stock Shares Activity [Table Text Block]	The following table summarizes non-vested restricted stock award activity for fiscal years 2019, 2018 and 2017: 2019 Weighted Weighted Average Grant Average Remaining Non-Vested Date Fair Value VestingTerm Shares (000's) (in years) Non-Vested at January 31, 2019 38,036 $ 2,935 2 Granted 9,442 662 Forfeited — — Vested 18,902 1,404 Non-Vested at January 31, 2020 28,576 $ 2,193 2 2018 Weighted Weighted Average Grant Average Remaining Non-Vested Date Fair Value VestingTerm Shares (000's) (in years) Non-Vested at January 31, 2018 29,415 $ 2,275 2 Granted 21,744 1,623 Forfeited — — Vested 13,123 963 Non-Vested at January 31, 2019 38,036 $ 2,935 2 2017 Weighted Weighted Average Grant Remaining Vesting Non-Vested Date Fair Value Vesting Term Shares (000's) (in years) Non-Vested at January 31, 2017 23,350 $ 1,386 2 Granted 14,156 1,370 Forfeited — — Vested 8,091 481 Non-Vested at January 31, 2018 29,415 $ 2,275 2

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The (benefit) provision for income taxes for fiscal years 2019, 2018 and 2017 consist of the following (amounts in thousands): 2019 2018 2017 Federal: Current $ 752 $ 81 $ (2,094 ) Deferred (10,777 ) (23,547 ) (19,528 ) (10,025 ) (23,466 ) (21,622 ) State and Local: Current (2,495 ) 361 1,180 Deferred (293 ) 183 923 (2,788 ) 544 2,103 Benefit for income taxes $ (12,813 ) $ (22,922 ) $ (19,519 )
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The tax effects of significant temporary differences representing deferred tax assets and liabilities are as follows (amounts in thousands): January 31, 2020 2019 Assets: General business credit carryforward $ 36,198 $ 26,523 Accrued liabilities 136 308 State net operating loss carryforward 366 294 Other items 230 647 Valuation allowance (232 ) (232 ) Total 36,698 27,540 Liabilities: Basis in pass through entities, including depreciation (23,823 ) (25,725 ) Other (148 ) (157 ) Total (23,971 ) (25,882 ) Net deferred tax asset $ 12,727 $ 1,658
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Reconciliations of the federal statutory tax and the Company’s income tax (benefit) expense for fiscal years 2019, 2018 and 2017 are as follows (amounts in thousands): 2019 2018 2017 Federal income tax at statutory rate $ (245 ) $ 3,063 $ 8,583 State and local taxes, net of federal tax benefit (427 ) 811 822 Section 45 production tax credits (9,002 ) (21,144 ) (11,522 ) Research and experimentation credits (899 ) (11,362 ) — Tax Cuts and Jobs Act — 272 (14,362 ) Domestic production activities deduction — (62 ) (1,503 ) Uncertain tax positions (1,435 ) 6,872 361 Noncontrolling interest (1,035 ) (1,425 ) (1,927 ) Other 230 53 29 Total $ (12,813 ) $ (22,922 ) $ (19,519 )
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): Fiscal Year 2019 2018 Unrecognized tax benefits, beginning of year $ 9,232 $ 2,325 Changes for tax positions for prior years (2,581 ) 5,973 Changes for tax positions for current year 719 934 Unrecognized tax benefits, end of year $ 7,370 $ 9,232

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Jan. 31, 2020
Segment Reporting (Tables) [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following tables summarize segment and other results and assets (amounts in thousands): Fiscal Year 2019 2018 2017 Net sales and revenue: Ethanol and by-products $ 417,700 $ 485,885 $ 452,153 Refined coal 1 334 786 433 Total net sales and revenue $ 418,034 $ 486,671 $ 452,586 Segment gross profit (loss): Ethanol and by-products $ 20,402 $ 43,856 $ 51,509 Refined coal (7,917 ) (13,641 ) (7,348 ) Total gross profit $ 12,485 $ 30,215 $ 44,161 (Loss) income before income taxes: Ethanol and by-products $ 8,469 $ 31,545 $ 38,352 Refined coal (7,778 ) (15,204 ) (10,021 ) Corporate and other (1,860 ) (1,753 ) (2,938 ) Total (loss) income before income taxes $ (1,169 ) $ 14,588 $ 25,393 Benefit (provision) for income taxes: Ethanol and by-products $ 1,528 $ (2,343 ) $ 3,245 Refined coal 10,828 24,674 15,168 Corporate and other 457 591 1,106 Total benefit for income taxes $ 12,813 $ 22,922 $ 19,519 Segment profit (loss): Ethanol and by-products $ 5,439 $ 23,346 $ 35,880 Refined coal 3,391 10,148 5,628 Corporate and other (1,403 ) (1,849 ) (1,802 ) Net income attributable to REX $ 7,427 $ 31,645 $ 39,706 Fiscal Year 2019 2018 2017 Sales of products, ethanol and by-products segment: Ethanol $ 321,434 $ 368,319 $ 359,239 Dried distillers grains 71,755 85,417 63,120 Non-food grade corn oil 17,135 20,097 21,195 Modified distillers grains 7,240 11,950 8,525 Other 136 102 74 Total sales $ 417,700 $ 485,885 $ 452,153 Sales of products, refined coal segment: Refined coal $ 334 $ 786 $ 433 Interest income: Ethanol and by-products $ 2,949 $ 2,460 $ 878 Refined coal — — — Corporate and other 1,171 1,054 678 Total interest income $ 4,120 $ 3,514 $ 1,556 Depreciation expense: Ethanol and by-products $ 20,182 $ 22,004 $ 20,037 Refined coal 2,790 2,784 1,385 Corporate and other 35 40 40 Total depreciation expense $ 23,007 $ 24,828 $ 21,462 Equity in income of unconsolidated affiliates: Ethanol and by-products $ 1,392 $ 1,536 $ 3,232 Refined coal — — — Corporate and other — — — Total equity in income of unconsolidated affiliates $ 1,392 $ 1,536 $ 3,232 1 Sales in the refined coal segment are recorded net of the cost of coal as the Company purchases the coal feedstock from the customer to which refined coal is sold.
Assets [Member]
Segment Reporting (Tables) [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	January 31, Assets: 2020 2019 Ethanol and by-products $ 408,746 $ 393,691 Refined coal 6,101 8,625 Corporate and other 85,655 69,077 Total assets $ 500,502 $ 471,393 Additions to property and equipment: Ethanol and by-products $ 3,776 $ 10,697 Refined coal — 78 Corporate and other — — Total additions to property and equipment $ 3,776 $ 10,775

QUARTERLY UNAUDITED INFORMATI_2

QUARTERLY UNAUDITED INFORMATION (Tables)	12 Months Ended
	Jan. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Table Text Block]	The following tables set forth the Company’s net sales and revenue, gross profit, net income and net income per share (basic and diluted) for each quarter during the last two fiscal years. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Quarters Ended (In Thousands, Except Per Share Amounts) April 30, July 31, October 31, January 31, 2019 2019 2019 2020 Net sales and revenue $ 104,575 $ 105,868 $ 86,671 $ 120,920 Gross profit (loss) 3,646 4,004 (1,758 ) 6,593 Net income (loss) 3,715 3,353 (1,673 ) 6,249 Net income (loss) attributable to REX common shareholders 2,821 2,256 (2,052 ) 4,402 Basic and diluted net income (loss) per share attributable to REX common shareholders (a) $ 0.45 $ 0.36 $ (0.32 ) $ 0.70 Quarters Ended April 30, July 31, October 31, January 31, 2018 2018 2018 2019 Net sales and revenue $ 120,820 $ 128,757 $ 123,750 $ 113,344 Gross profit 10,851 9,399 7,747 2,218 Net income 10,352 10,490 13,769 2,899 Net income attributable to REX common shareholders 9,496 9,217 11,875 1,057 Basic and diluted net income per share attributable to REX common shareholders $ 1.45 $ 1.43 $ 1.86 $ 0.17 a) The total of the quarterly net income per share amounts do not equal the annual net income per share amounts due to the impact of varying amounts of shares outstanding during the year.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
	Jan. 31, 2020USD ($)shares	Jan. 31, 2019USD ($)	Jan. 31, 2018USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number Of Operating Entities	5
Number of Reportable Segments	2		2
Inventory Write-down	$ 1,300,000	$ 0	$ 0
Property, Plant and Equipment, Depreciation Methods	Depreciation is computed using the straight-line method.
Asset Impairment Charges	$ 0	0	0
Depreciation	23,007,000	24,828,000	21,462,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	$ 0	$ 0	$ 0
Common Stock, Capital Shares Reserved for Future Issuance | shares	550,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%		35.00%
Increase (Decrease) in Total Assets and Total Liabilities	$ 20,900,000
Minimum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Payment Term	5 days
Maximum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Payment Term	10 days
Ethanol [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number of Reportable Segments	3
Ethanol [Member] | Majority-Owned Subsidiary, Unconsolidated [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number of Reportable Segments	2
Refined Coal [Member] | Majority-Owned Subsidiary, Unconsolidated [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number of Reportable Segments	1
Customer Concentration Risk [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Concentration Risk, Customer	Eight	six	six
Concentration Risk, Percentage	85.00%	85.00%	87.00%
Percent of Accounts Receivable	88.00%	80.00%
Contracts Not Accounted For Under Normal Purchases and Normal Sales
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Liabilities	$ 230,000	$ 21,000
Consolidated Entities [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number Of Operating Entities	4
Equity Method Investee [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Number Of Operating Entities	1
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%
Building and Building Improvements [Member] | Minimum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	5
Building and Building Improvements [Member] | Maximum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	40 years
Fixtures And Equipment [Member] | Minimum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	2
Fixtures And Equipment [Member] | Maximum [Member]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	20 years

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of Components of Basis of Presentation - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Schedule of Components of Basis of Presentation [Abstract]
Interest income	$ 4,120	$ 3,514	$ 1,556
Grant income			691
Loss on sale of investment			(13)
Loss on disposal of real estate and property and equipment, net		(104)	(192)
Other	92	(22)	18
Total	$ 4,212	$ 3,388	$ 2,060

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of Components of Inventory - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of Components of Inventory [Abstract]
Ethanol and other finished goods	$ 10,864	$ 5,767
Work in process	3,258	3,094
Grain and other raw materials	21,512	9,616
Total	$ 35,634	$ 18,477

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Schedule of Property Plant and Equipment - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of Property Plant and Equipment [Abstract]
Land and improvements	$ 21,957	$ 21,469
Buildings and improvements	23,643	23,608
Machinery, equipment and fixtures	300,972	297,807
Construction in progress	193	708
	346,765	343,592
Less: accumulated depreciation	(183,438)	(161,071)
Total	$ 163,327	$ 182,521

INVESTMENTS (Details)

INVESTMENTS (Details) gal in Millions	12 Months Ended
	Jan. 31, 2020USD ($)gal	Jan. 31, 2019USD ($)	Jan. 31, 2018USD ($)
INVESTMENTS (Details) [Line Items]
Income (Loss) from Equity Method Investments	$ 1,392,000	$ 1,536,000	$ 3,232,000
Proceeds from Equity Method Investment, Distribution	1,003,000	4,010,000	6,516,000
Equity Method Investments	32,464,000	32,075,000
Short-term Investments	$ 26,073,000	$ 14,975,000
Debt Securities, Held-to-Maturity, Weighted Average Yield, Maturity, Year One	1.80%	2.30%
Big River [Member]
INVESTMENTS (Details) [Line Items]
Payments to Acquire Equity Method Investments	$ 20,000,000
Quantity of ethanol shipped (in US Gallons) | gal	424.6
Income (Loss) from Equity Method Investments	$ 1,400,000	$ 1,500,000	3,200,000
Proceeds from Equity Method Investment, Distribution	1,000,000	$ 4,000,000	$ 6,500,000
Equity Method Investments	32,500,000
Equity Method Investment, Underlying Equity in Net Assets	27,700,000
Other Restricted Assets	173,700,000
Proportionate Share of Restricted Net Assets	$ 17,900,000

INVESTMENTS (Details) - Schedul

INVESTMENTS (Details) - Schedule of Equity Method Investments - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of Equity Method Investments [Abstract]
Carrying amount	$ 32,464	$ 32,075
Ownership percentage	10.30%	10.30%

INVESTMENTS (Details) - Sched_2

INVESTMENTS (Details) - Schedule of Condensed Balance Sheet - Big River [Member] - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Condensed Balance Sheet Statements, Captions [Line Items]
Current assets	$ 146,494	$ 117,796
Non current assets	211,235	241,382
Total assets	357,729	359,178
Current liabilities	55,552	50,172
Long-term liabilities		701
Total liabilities	55,552	50,873
Noncontrolling interests	$ 33,966	$ 34,149

INVESTMENTS (Details) - Sched_3

INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment - Big River [Member] - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
INVESTMENTS (Details) - Schedule of Financial information For Equity Method Investment [Line Items]
Net sales and revenue	$ 823,718	$ 802,523	$ 817,112
Gross profit	30,774	33,782	60,259
Income from continuing operations	13,502	14,893	32,243
Net income	$ 13,502	$ 14,893	$ 32,243

BUSINESS COMBINATIONS (Details)

BUSINESS COMBINATIONS (Details) - Refined Coal [Member] - USD ($)	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2018	Aug. 10, 2017
BUSINESS COMBINATIONS (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			95.35%
Net Sales and Revenue of Business Segment	$ 1,600,000
Net Income (Loss) Attributable to Parent	19,200,000
Business Acquisition, Pro Forma Revenue		$ 452,600,000
Business Acquisition, Pro Forma Net Income (Loss)		38,900,000
Payments to Acquire Businesses, Gross	$ 12,049,000
Business Acquisition, Transaction Costs		$ 2,500,000

BUSINESS COMBINATIONS (Detail_2

BUSINESS COMBINATIONS (Details) - Schedule of Estimated Fair Values of Assets Acquired at Acquisition Date $ in Thousands	12 Months Ended
	Jan. 31, 2020USD ($)
Schedule of Estimated Fair Values of Assets Acquired at Acquisition Date [Abstract]
Inventory	$ 49
Property, plant and equipment	12,000
Total assets acquired and purchase price	$ 12,049

FAIR VALUE (Details) - Schedule

FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis - USD ($) $ in Thousands		Jan. 31, 2020	Jan. 31, 2019
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Commodity futures	[1]	$ 352	$ 44
Investment in cooperative	[2]	341	333
Total assets		693	377
Forward purchase contracts liability	[3]	230	22
Fair Value, Inputs, Level 1 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Commodity futures	[1]
Investment in cooperative	[2]
Forward purchase contracts liability	[3]
Fair Value, Inputs, Level 2 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Commodity futures	[1]	352	44
Investment in cooperative	[2]
Total assets		352	44
Forward purchase contracts liability	[3]	230	22
Fair Value, Inputs, Level 3 [Member]
FAIR VALUE (Details) - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Commodity futures	[1]
Investment in cooperative	[2]	341	333
Total assets		341	333
Forward purchase contracts liability	[3]
[1]	The commodity futures asset is included in "Prepaid expenses and other" on the accompanying Consolidated Balance Sheets.
[2]	The investment in cooperative is included in "Other assets" on the accompanying Consolidated Balance Sheets.
[3]	The forward purchase contracts liability is included in "Accrued expenses and other current liabilities" on the accompanying Consolidated Balance Sheets.

OTHER ASSETS (Details) - Schedu

OTHER ASSETS (Details) - Schedule of Other Assets - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of Other Assets [Abstract]
Deferred taxes	$ 17,061	$ 5,843
Other	342	333
Total	$ 17,403	$ 6,176

ACCRUED EXPENSES AND OTHER CU_3

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - Schedule of accrued expenses and other current liabilities - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of accrued expenses and other current liabilities [Abstract]
Accrued payroll and related items	$ 1,152	$ 2,041
Accrued utility charges	2,398	2,924
Accrued transportation related items	1,500	1,567
Accrued real estate taxes	1,755	1,680
Accrued income taxes	68	71
Other	891	1,263
Total	$ 7,764	$ 9,546

LEASES (Details)

LEASES (Details)	Jan. 31, 2020
Disclosure Text Block [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	3 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	5.46%

LEASES (Details) - Schedule of

LEASES (Details) - Schedule of Components of Lease Expense $ in Thousands	12 Months Ended
	Jan. 31, 2020USD ($)
Schedule of Components of Lease Expense [Abstract]
Operating lease expense	$ 6,526
Variable lease expense	556
Total lease expense	$ 7,082

LEASES (Details) - Schedule o_2

LEASES (Details) - Schedule of Future Minimum Rental Payments for Operating Leases $ in Thousands	Jan. 31, 2020USD ($)
Schedule of Future Minimum Rental Payments for Operating Leases [Abstract]
2021	$ 5,668
2022	4,958
2023	3,251
2024	2,085
2025	1,228
Thereafter	29
Total	17,219
Less: present value discount	1,596
Operating lease liabilities	$ 15,623

LEASES (Details) - Schedule o_3

LEASES (Details) - Schedule of Future Minimum Rental Payments for Operating Leases - 3743 Railroad Equipment [Member] $ in Thousands	Jan. 31, 2020USD ($)
LEASES (Details) - Schedule of Future Minimum Rental Payments for Operating Leases [Line Items]
2020	$ 6,767
2021	5,487
2022	4,791
2023	3,208
2024	2,041
Thereafter	1,221
Total	$ 23,515

COMMON STOCK (Details)

COMMON STOCK (Details) - USD ($)	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Stockholders' Equity Note [Abstract]
Treasury Stock, Shares, Acquired	349,861	305,473
Treasury Stock, Value, Acquired, Cost Method (in Dollars)		$ 21,855,000

COMMON STOCK (Details) - Schedu

COMMON STOCK (Details) - Schedule of Common Stock - shares shares in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of Common Stock [Abstract]
Authorized shares	45,000	45,000
Issued shares	29,853	29,853
Outstanding shares	6,292	6,274

DERIVATIVE FINANCIAL INSTRUME_3

DERIVATIVE FINANCIAL INSTRUMENTS (Details) l in Millions, bu in Millions	12 Months Ended
	Jan. 31, 2020USD ($)bu	Jan. 31, 2019USD ($)bul	Jan. 31, 2018USD ($)
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Debt Instrument, Collateral Amount | $	$ 1,113,000
Derivative, Gain on Derivative | $	$ 2,201,000	$ 2,698,000	$ 1,317,000
Corn [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Forward Purchase Contracts, Quantity | bu	1.6	1.3
Short/Sell [Member] | Corn [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Commodity Futures, Quantity	3.7	2
Long/Buy [Member] | Corn [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) [Line Items]
Commodity Futures, Quantity | bu	2.2

DERIVATIVE FINANCIAL INSTRUME_4

DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments - USD ($) $ in Thousands		Jan. 31, 2020	Jan. 31, 2019
Commodity Contract [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]
Asset Derivatives, Fair Value	[1]	$ 352	$ 44
Liability Derivatives, Fair Value	[1]
Forward Contracts [Member]
DERIVATIVE FINANCIAL INSTRUMENTS (Details) - Schedule of Fair Values for Derivative Financial Instruments [Line Items]
Asset Derivatives, Fair Value	[2]
Liability Derivatives, Fair Value	[2]	$ 230	$ 22
[1]	Commodity futures assets are included in prepaid expenses and other. These contracts are short/sell positions for approximately 3.7 million bushels of corn and long/buy positions for approximately 2.2 million bushels of corn at January 31, 2020. These contracts are short/sell positions for approximately 2.0 million bushels of corn at January 31, 2019.
[2]	Forward purchase contracts liabilities are included in accrued expenses and other current liabilities while forward purchase contracts assets are included in prepaid expenses and other. These contracts are for purchases of approximately 1.6 million bushels of corn at January 31, 2020 and 1.3 million bushels of corn at January 31, 2019.

EMPLOYEE BENEFITS (Details)

EMPLOYEE BENEFITS (Details) - USD ($)	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount (in Dollars)	$ 220,000	$ 200,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	28,576,000	38,036,000	29,415,000	23,350,000
Rex Shareholders [Member]
EMPLOYEE BENEFITS (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	24,219	34,148	24,711
Stock Option Plans 2015 [Member] | Share-based Payment Arrangement, 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	479,988

EMPLOYEE BENEFITS (Details) - S

EMPLOYEE BENEFITS (Details) - Schedule of Non-Vested Restricted Stock Award Activity - USD ($) shares in Thousands, $ / shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Schedule of Non-Vested Restricted Stock Award Activity [Abstract]
Non-Vested Shares, Beginning of Period	38,036	29,415	23,350
Weighted Average Grant Date Fair Value, Beginning of Period (in Dollars)	$ 2,935	$ 2,275	$ 1,386
Weighted Average Vesting Term, Beginning of Period	2 years	2 years	2 years
Non-Vested Shares, Granted	9,442	21,744	14,156
Weighted Average Grant Date Fair Value, Granted (in Dollars per share)	$ 662	$ 1,623	$ 1,370
Non-Vested Shares, Vested	18,902	13,123	8,091
Weighted Average Grant Date Fair Value, Vested (in Dollars)	$ 1,404	$ 963	$ 481
Non-Vested Shares, End of Period	28,576	38,036	29,415
Weighted Average Grant Date Fair Value, End of Period (in Dollars)	$ 2,193	$ 2,935	$ 2,275
Weighted Average Vesting Term, End of Period	2 years	2 years	2 years

COMMITMENTS (Details)

COMMITMENTS (Details) lb in Millions, gal in Millions, bu in Millions	12 Months Ended
	Jan. 31, 2020USD ($)MMBTUTlbgalbu	Jan. 31, 2019USD ($)	Jan. 31, 2018USD ($)
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
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

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($)	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Tax Credit Carryforwards	$ 36,198,000	$ 26,523,000
Deferred Tax Assets, Valuation Allowance	$ 232,000	$ 232,000	$ 241,000	$ 417,000
Valuation Allowance, Methodologies and Assumptions		$9,000	$176,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%		35.00%
Deferred Other Tax Expense (Benefit)	$ (14,362,000)
Tax Adjustments, Settlements, and Unusual Provisions	272,000
Tax Credit Carryforward, Amount	9,000,000	$ 21,200,000	$ 11,500,000
Deferred Federal, State and Local, Tax Expense (Benefit)	400,000	4,600,000
Income Taxes Paid	565,000	855,000	6,920,000
Proceeds from Income Tax Refunds	11,000	$ 1,132,000	$ 476,000
Unrecognized Tax Benefits	7,353,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	17,000
Increase (Decrease) in Provision For Income Taxes	$ (7,299,000)

INCOME TAXES (Details) - Schedu

INCOME TAXES (Details) - Schedule of Unrecognized Tax Benefits Roll Forward - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Federal:
Current	$ 752	$ 81	$ (2,094)
Deferred	(10,777)	(23,547)	(19,528)
	(10,025)	(23,466)	(21,622)
State and Local:
Current	(2,495)	361	1,180
Deferred	(293)	183	923
	(2,788)	544	2,103
Benefit for income taxes	$ (12,813)	$ (22,922)	$ (19,519)

INCOME TAXES (Details) - Sche_2

INCOME TAXES (Details) - Schedule of Deferred Tax Assets and Liabilities - USD ($)	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Schedule of Deferred Tax Assets and Liabilities [Abstract]
General business credit carryforward	$ 36,198,000	$ 26,523,000
Accrued liabilities	136,000	308,000
State net operating loss carryforward	366,000	294,000
Other items	230,000	647,000
Valuation allowance	(232,000)	(232,000)	$ (241,000)	$ (417,000)
Total	36,698,000	27,540,000
Basis in pass through entities, including depreciation	(23,823,000)	(25,725,000)
Other	(148,000)	(157,000)
Total	(23,971,000)	(25,882,000)
Net deferred tax asset	$ 12,727,000	$ 1,658,000

INCOME TAXES (Details) - Sche_3

INCOME TAXES (Details) - Schedule of Effective Income Tax Reconciliation - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Schedule of Effective Income Tax Reconciliation [Abstract]
Federal income tax at statutory rate	$ (245)	$ 3,063	$ 8,583
State and local taxes, net of federal tax benefit	(427)	811	822
Section 45 production tax credits	(9,002)	(21,144)	(11,522)
Research and experimentation credits	(899)	(11,362)
Tax Cuts and Jobs Act		272	(14,362)
Domestic production activities deduction		(62)	(1,503)
Uncertain tax positions	(1,435)	6,872	361
Noncontrolling interest	(1,035)	(1,425)	(1,927)
Other	230	53	29
Total	$ (12,813)	$ (22,922)	$ (19,519)

INCOME TAXES (Details) - Sche_4

INCOME TAXES (Details) - Schedule of Unrecognized Tax Benefits Roll Forward - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Schedule of Unrecognized Tax Benefits Roll Forward [Abstract]
Unrecognized tax benefits, beginning of year	$ 9,232	$ 2,325
Changes for tax positions for prior years	(2,581)	5,973
Changes for tax positions for current year	719	934
Unrecognized tax benefits, end of year	$ 7,370	$ 9,232

Segment Reporting (Details)

Segment Reporting (Details)	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2018
Segment Reporting [Abstract]
Number of Reportable Segments	2	2

Segment Reporting (Details) - S

Segment Reporting (Details) - Schedule Of Segment Results And Assets - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Net sales and revenue:
Net sales and revenue:										$ 418,034	$ 486,671	$ 452,586
Segment gross profit (loss):
Segment gross profit (loss):		$ 6,593	$ (1,758)	$ 4,004	$ 3,646	$ 2,218	$ 7,747	$ 9,399	$ 10,851	12,485	30,215	44,161
(Loss) income before income taxes:
(Loss) income before income taxes:										(1,169)	14,588	25,393
Benefit (provision) for income taxes:
Benefit (provision) for income taxes:										12,813	22,922	19,519
Segment profit (loss):
Segment profit (loss):										7,427	31,645	39,706
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										417,700	485,885	452,153
Interest income:
Interest income:										4,120	3,514	1,556
Depreciation expense:
Depreciation expense:										23,007	24,828	21,462
Equity in income of unconsolidated affiliates:
Equity in income of unconsolidated affiliates:										1,392	1,536	3,232
Ethanol [Member]
Net sales and revenue:
Net sales and revenue:										417,700	485,885	452,153
Segment gross profit (loss):
Segment gross profit (loss):										20,402	43,856	51,509
(Loss) income before income taxes:
(Loss) income before income taxes:										8,469	31,545	38,352
Benefit (provision) for income taxes:
Benefit (provision) for income taxes:										1,528	(2,343)	3,245
Segment profit (loss):
Segment profit (loss):										5,439	23,346	35,880
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										321,434	368,319	359,239
Interest income:
Interest income:										2,949	2,460	878
Depreciation expense:
Depreciation expense:										20,182	22,004	20,037
Equity in income of unconsolidated affiliates:
Equity in income of unconsolidated affiliates:										1,392	1,536	3,232
Refined Coal [Member]
Net sales and revenue:
Net sales and revenue:	[1]									334	786	433
Segment gross profit (loss):
Segment gross profit (loss):										(7,917)	(13,641)	(7,348)
(Loss) income before income taxes:
(Loss) income before income taxes:										(7,778)	(15,204)	(10,021)
Benefit (provision) for income taxes:
Benefit (provision) for income taxes:										10,828	24,674	15,168
Segment profit (loss):
Segment profit (loss):										3,391	10,148	5,628
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										334	786	433
Depreciation expense:
Depreciation expense:										2,790	2,784	1,385
Corporate and Other [Member]
(Loss) income before income taxes:
(Loss) income before income taxes:										(1,860)	(1,753)	(2,938)
Benefit (provision) for income taxes:
Benefit (provision) for income taxes:										457	591	1,106
Segment profit (loss):
Segment profit (loss):										(1,403)	(1,849)	(1,802)
Interest income:
Interest income:										1,171	1,054	678
Depreciation expense:
Depreciation expense:										35	40	40
Dried Distillers Grains [Member]
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										71,755	85,417	63,120
Non-Food Grade Corn Oil [Member]
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										17,135	20,097	21,195
Modified Distillers Grains [Member]
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										7,240	11,950	8,525
Other Segments [Member]
Sales of products, ethanol and by-products segment:
Sales of products, ethanol and by-products segment:										$ 136	$ 102	$ 74
[1]	Sales in the refined coal segment are recorded 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) -_2

Segment Reporting (Details) - Schedule Of Segment Assets - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 500,502	$ 471,393
Additions to property and equipment:
Additions to property and equipment:	3,776	10,775
Ethanol [Member]
Segment Reporting Information [Line Items]
Assets	408,746	393,691
Additions to property and equipment:
Additions to property and equipment:	3,776	10,697
Refined Coal [Member]
Segment Reporting Information [Line Items]
Assets	6,101	8,625
Additions to property and equipment:
Additions to property and equipment:		78
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets	$ 85,655	$ 69,077

QUARTERLY UNAUDITED INFORMATI_3

QUARTERLY UNAUDITED INFORMATION (Details) - Schedule of Quarterly Financial Information - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jan. 31, 2020		Oct. 31, 2019		Jul. 31, 2019		Apr. 30, 2019		Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Schedule of Quarterly Financial Information [Abstract]
Net sales and revenue	$ 120,920		$ 86,671		$ 105,868		$ 104,575		$ 113,344	$ 123,750	$ 128,757	$ 120,820	$ 418,034	$ 486,671	$ 452,586
Gross profit (loss)	6,593		(1,758)		4,004		3,646		2,218	7,747	9,399	10,851	12,485	30,215	44,161
Net income (loss)	6,249		(1,673)		3,353		3,715		2,899	13,769	10,490	10,352	11,644	37,510	44,912
Net income (loss) attributable to REX common shareholders	$ 4,402		$ (2,052)		$ 2,256		$ 2,821		$ 1,057	$ 11,875	$ 9,217	$ 9,496	$ 7,427	$ 31,645	$ 39,706
Basic and diluted net income (loss) per share attributable to REX common shareholders (in Dollars per share)	$ 700	[1]	$ (320)	[1]	$ 360	[1]	$ 450	[1]	$ 170	$ 1,860	$ 1,430	$ 1,450	$ 1.18	$ 4.91	$ 6.02
[1]	The total of the quarterly net income per share amounts do not equal the annual net income per share amounts due to the impact of varying amounts of shares outstanding during the year.

RELATED PARTIES (Details)

RELATED PARTIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
RELATED PARTIES (Details) [Line Items]
Accounts Payable, Related Parties, Current	$ 700	$ 1,900
Proceeds from Contributions from Affiliates	312	524	$ 918
One Earth Energy And Nu Gen Energy [Member]
RELATED PARTIES (Details) [Line Items]
Costs and Expenses, Related Party	171,500	176,800	154,500
Refined Coal [Member]
RELATED PARTIES (Details) [Line Items]
Costs and Expenses, Related Party	(700)	800	$ 1,800
Accrued Liabilities for Commissions, Expense and Taxes	500	1,600
Proceeds from Contributions from Affiliates	$ 300	$ 500

Schedule II - VALUATION AND Q_2

Schedule II - VALUATION AND QUALIFYING ACCOUNTS (Details) - VALUATION AND QUALIFYING ACCOUNTS - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
2020:
Balance	$ 241,000	$ 417,000
Deductions Charges for Which Reserves Were Created	9,000	176,000
Balance	$ 232,000	$ 241,000