Total current assets Total assets Total current liabilities Total long-term liabilities Total REX shareholders’ equity Total equity Balance Balance Total liabilities and equity Gross profit Gross profit Income before income taxes Net income Net income attributable to REX common shareholders Balance (in Shares) Balance (in Shares) Equity Components [Axis] Net cash provided by operating activities Net cash provided by (used in) investing activities Net cash used in financing activities Net increase in cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Total Inventory Segments [Axis] Total lease expense Total Operating lease liabilities Total assets Fair Value Hierarchy and NAV [Axis] Total property and equipment Total Property and equipment, net Total Total Derivative Instrument [Axis] Investment, Name [Axis] Legal Entity [Axis] Non-Vested Shares Non-Vested Shares Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value Weighted Average Vesting Term Weighted Average Vesting Term Weighted average shares – diluted Weighted average shares outstanding – diluted (in Shares) Unrecognized tax benefits, beginning of period Unrecognized tax benefits, end of period Unrecognized Tax Benefits Document Type Document Quarterly Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Interactive Data Current Entity Current Reporting Status Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Amendment Flag Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Central Index Key Assets Current assets: Cash and cash equivalents Short-term investments Short-Term Investments Accounts receivable Refundable income taxes Prepaid expenses and other Operating lease right-of-use assets Other assets Equity method investment Carrying Amount Liabilities and equity Current liabilities: Accounts payable – trade (includes $1.2 million and $5.8 million with related parties at October 31, 2024 and January 31, 2024, respectively) Accounts payable - trade, related parties Accounts Payable Related Parties Current operating lease liabilities Accrued expenses and other current liabilities Long-term liabilities: Deferred taxes Long-term operating lease liabilities Other long-term liabilities Equity REX shareholders’ equity: Common stock Paid-in capital Retained earnings Noncontrolling interests Net sales and revenue Sales of products, continuing operations Cost of sales (includes $22,739 and $32,723 with related parties for the three months ended October 31, 2024 and 2023, respectively, and $81,726 and $92,610 with related parties for the nine months ended October 31, 2024 and 2023, respectively.) Cost of sales, related parties Equity in income of unconsolidated affiliates Income from equity method investments Interest and other income, net Weighted average shares outstanding – basic (in Shares) Weighted average shares – basic Basic net income per share attributable to REX common shareholders (in Dollars per share) Diluted net income per share attributable to REX common shareholders (in Dollars per share) Net income Net income including noncontrolling interests Issuance of equity awards and stock based compensation expense Issuance of equity awards and stock based compensation expense (in Shares) Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Depreciation Amortization of operating lease right-of-use assets Deferred income tax Stock based compensation expense Changes in assets and liabilities: Accounts payable, trade Other liabilities Cash flows from investing activities: Maturity of short-term investments Proceeds from sale of real estate and property and equipment Cash flows from financing activities: Payments to noncontrolling interests holders Non cash investing activities – Accrued capital expenditures Non cash investing activities – Capital additions transferred from prepaid expenses Non cash financing activities – Stock awards accrued Non cash financing activities – Stock awards issued Right-of-use assets acquired and liabilities incurred upon lease execution Treasury stock Selling, general and administrative expenses Provision for income taxes Income Tax Expense (Benefit) Net income attributable to noncontrolling interests Noncontrolling interests distribution and other Dividends received from equity method investments Interest income from investments Loss on disposal of property and equipment – net Accounts receivable Inventories Refundable income taxes Other assets Capital expenditures Purchase of short-term investments Deposits Common Stock [Member] Treasury Stocks [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Noncontrolling Interest [Member] Condensed Financial Information of Parent Company Only Disclosure [Text Block] Significant Accounting Policies [Text Block] Schedule of Inventory, Current [Table Text Block] Ethanol and other finished goods Work in process Corn and other raw materials Revenue from Contract with Customer [Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Leases of Lessee Disclosure [Text Block] Lease, Cost [Table Text Block] Operating lease expense Variable lease expense Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Remainder of 2025 2026 2027 2028 2029 Thereafter Less: present value discount Fair Value Disclosures [Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Forward purchase contracts asset Commodity futures Forward purchase contracts liability Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment [Table Text Block] Land and improvements Buildings and improvements Machinery, equipment, and fixtures Construction in progress Other Assets Disclosure [Text Block] Schedule of Other Assets [Table Text Block] Prepaid utility lease Deferred taxes Other Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Other Current Liabilities [Table Text Block] Accrued payroll and related items Accrued utility charges Accrued transportation related items Accrued real estate taxes Forward purchase contracts Other Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Derivative Assets at Fair Value [Table Text Block]