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Segment Reporting (Tables) | 6 Months Ended
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Jul. 31, 2021
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):
|  | Three Months Ended July 31, |  |  | Six Months Ended July 31, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Net sales and revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ethanol and by-products |  | $ | 195,678 |  |  | $ | 39,242 |  |  | $ | 359,720 |  |  | $ | 122,477 |
Refined coal 1 |  |  | 165 |  |  |  | 85 |  |  |  | 227 |  |  |  | 100 |
Total net sales and revenue |  | $ | 195,843 |  |  | $ | 39,327 |  |  | $ | 359,947 |  |  | $ | 122,577 |
|  | Three Months Ended July 31, |  |  | Six Months Ended July 31, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Segment gross profit (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ethanol and by-products |  | $ | 14,155 |  |  | $ | 553 |  |  | $ | 33,631 |  |  | $ | (7,670) |
Refined coal |  |  | (3,081) |  |  |  | (1,884) |  |  |  | (4,755) |  |  |  | (2,991) |
Total gross profit (loss) |  | $ | 11,074 |  |  | $ | (1,331) |  |  | $ | 28,876 |  |  | $ | (10,661) |
Income (loss) before income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ethanol and by-products |  | $ | 10,732 |  |  | $ | (3,259) |  |  | $ | 21,820 |  |  | $ | (15,610) |
Refined coal |  |  | (3,455) |  |  |  | (2,118) |  |  |  | (5,260) |  |  |  | (2,965) |
Corporate and other |  |  | (902) |  |  |  | (702) |  |  |  | (1,758) |  |  |  | (1,247) |
Total income (loss) before income taxes |  | $ | 6,375 |  |  | $ | (6,079) |  |  | $ | 14,802 |  |  | $ | (19,822) |
(Provision) benefit for income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ethanol and by-products |  | $ | (1,985) |  |  | $ | 893 |  |  | $ | (4,423) |  |  | $ | 5,054 |
Refined coal |  |  | 5,441 |  |  |  | 2,919 |  |  |  | 7,639 |  |  |  | 3,878 |
Corporate and other |  |  | 221 |  |  |  | 234 |  |  |  | 432 |  |  |  | 427 |
Total benefit for income taxes |  | $ | 3,677 |  |  | $ | 4,046 |  |  | $ | 3,648 |  |  | $ | 9,359 |
|  | Three Months Ended July 31, |  |  | Six Months Ended July 31, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Net income (loss) (net of noncontrolling interests): |  |  |  |  |  |  |  |  |  |  |  |
Ethanol and by-products |  | $ | 6,418 |  |  | $ | (2,178) |  |  | $ | 14,374 |  |  | $ | (9,611) |
Refined coal |  |  | 2,139 |  |  |  | 898 |  |  |  | 2,612 |  |  |  | 1,048 |
Corporate and other |  |  | (681) |  |  |  | (468) |  |  |  | (1,326) |  |  |  | (820) |
Net income (loss) attributable to REX common shareholders |  | $ | 7,876 |  |  | $ | (1,748) |  |  | $ | 15,660 |  |  | $ | (9,383) |
|  | Three Months Ended July 31, |  |  | Six Months Ended July 31, |
Sales of products, ethanol and by-products segment: |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Ethanol |  | $ | 153,990 |  |  | $ | 32,524 |  |  | $ | 280,059 |  |  | $ | 93,121 |
Dried distillers grains |  |  | 31,573 |  |  |  | 5,480 |  |  |  | 62,691 |  |  |  | 24,398 |
Non-food grade corn oil |  |  | 9,813 |  |  |  | 1,313 |  |  |  | 15,407 |  |  |  | 4,501 |
Modified distillers grains |  |  | 1,934 |  |  |  | 209 |  |  |  | 4,227 |  |  |  | 666 |
Derivative financial instruments losses |  |  | (1,638) |  |  |  | (298) |  |  |  | (2,764) |  |  |  | (298) |
Other |  |  | 6 |  |  |  | 14 |  |  |  | 100 |  |  |  | 89 |
Total |  | $ | 195,678 |  |  | $ | 39,242 |  |  | $ | 359,720 |  |  | $ | 122,477 |
Sales of products, refined coal segment: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refined coal |  | $ | 165 |  |  | $ | 85 |  |  | $ | 227 |  |  | $ | 100 |
Assets [Member] |
Segment Reporting (Tables) [Line Items] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
Assets: |  | July 31, 2021 |  |  | January 31, 2021 |
Ethanol and by-products |  | $ | 424,470 |  |  | $ | 397,281 |
Refined coal |  |  | 1,540 |  |  |  | 2,861 |
Corporate and other |  |  | 79,497 |  |  |  | 79,203 |
Total assets |  | $ | 505,507 |  |  | $ | 479,345 |

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