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SEGMENT REPORTING (Details) - Schedule Of Segment Results And Assets - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2021 | Oct. 31, 2020 | Jul. 31, 2020 | Apr. 30, 2020 | Jan. 31, 2020 | Oct. 31, 2019 | Jul. 31, 2019 | Apr. 30, 2019 | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Net sales and revenue: |  |  |  |  |  |  |  |  |  |  |  |
Net sales and revenue: |  | $ 126,018 | $ 124,251 | $ 39,327 | $ 83,250 | $ 120,920 | $ 86,671 | $ 105,868 | $ 104,575 | $ 372,846 | $ 418,034 | $ 486,671
Segment gross profit (loss): |  |  |  |  |  |  |  |  |  |  |  |
Segment gross profit (loss): |  | $ 6,843 | $ 17,679 | $ (1,331) | $ (9,330) | $ 6,593 | $ (1,758) | $ 4,004 | $ 3,646 | 13,861 | 12,485 | 30,215
(Loss) income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  | (1,482) | (1,169) | 14,588
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  | 7,100 | 12,813 | 22,922
Net income attributable to REX common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss): |  |  |  |  |  |  |  |  |  | 3,001 | 7,427 | 31,645
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | 372,664 | 417,700 | 485,885
Interest income: |  |  |  |  |  |  |  |  |  |  |  |
Interest income: |  |  |  |  |  |  |  |  |  | 964 | 4,120 | 3,514
Depreciation expense: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense: |  |  |  |  |  |  |  |  |  | 20,906 | 23,007 | 24,828
Equity in income of unconsolidated affiliates: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income of unconsolidated affiliates: |  |  |  |  |  |  |  |  |  | 500 | 1,392 | 1,536
Ethanol [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales and revenue: |  |  |  |  |  |  |  |  |  |  |  |
Net sales and revenue: |  |  |  |  |  |  |  |  |  | 372,664 | 417,700 | 485,885
Segment gross profit (loss): |  |  |  |  |  |  |  |  |  |  |  |
Segment gross profit (loss): |  |  |  |  |  |  |  |  |  | 19,533 | 20,402 | 43,856
(Loss) income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  | 6,696 | 8,469 | 31,545
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  | (31) | 1,528 | (2,343)
Net income attributable to REX common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss): |  |  |  |  |  |  |  |  |  | 3,788 | 5,439 | 23,346
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | 284,191 | 321,434 | 368,319
Interest income: |  |  |  |  |  |  |  |  |  |  |  |
Interest income: |  |  |  |  |  |  |  |  |  | 675 | 2,949 | 2,460
Depreciation expense: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense: |  |  |  |  |  |  |  |  |  | 18,081 | 20,182 | 22,004
Equity in income of unconsolidated affiliates: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income of unconsolidated affiliates: |  |  |  |  |  |  |  |  |  | 500 | 1,392 | 1,536
Refined Coal [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales and revenue: |  |  |  |  |  |  |  |  |  |  |  |
Net sales and revenue: | [1] |  |  |  |  |  |  |  |  | 182 | 334 | 786
Segment gross profit (loss): |  |  |  |  |  |  |  |  |  |  |  |
Segment gross profit (loss): |  |  |  |  |  |  |  |  |  | (5,672) | (7,917) | (13,641)
(Loss) income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  | (5,826) | (7,778) | (15,204)
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  | 6,554 | 10,828 | 24,674
Net income attributable to REX common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss): |  |  |  |  |  |  |  |  |  | 988 | 3,391 | 10,148
Sales of products, refined coal segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, refined coal segment: |  |  |  |  |  |  |  |  |  | 182 | 334 | 786
Depreciation expense: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense: |  |  |  |  |  |  |  |  |  | 2,790 | 2,790 | 2,784
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  | (2,352) | (1,860) | (1,753)
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  |  |  |
Benefit (provision) for income taxes: |  |  |  |  |  |  |  |  |  | 577 | 457 | 591
Net income attributable to REX common shareholders: |  |  |  |  |  |  |  |  |  |  |  |
Segment profit (loss): |  |  |  |  |  |  |  |  |  | (1,775) | (1,403) | (1,849)
Interest income: |  |  |  |  |  |  |  |  |  |  |  |
Interest income: |  |  |  |  |  |  |  |  |  | 289 | 1,171 | 1,054
Depreciation expense: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense: |  |  |  |  |  |  |  |  |  | 35 | 35 | 40
Dried Distillers Grains [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | 71,774 | 71,755 | 85,417
Non-Food Grade Corn Oil [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | 15,066 | 17,135 | 20,097
Modified Distillers Grains [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | 2,626 | 7,240 | 11,950
Derivative Financial Instrument Losses [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | (1,167) |  |
Other Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  |  |  |
Sales of products, ethanol and by-products segment: |  |  |  |  |  |  |  |  |  | $ 174 | $ 136 | $ 102
[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.

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