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Discontinued Operations (Details) - Schedule Of Discontinued Items Statement of Operations - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Oct. 31, 2021 | Oct. 31, 2020
Schedule Of Discontinued Items Statement of Operations [Abstract] |  |  |  |  |
Net sales and revenue | [1] | $ 151 | $ 34 | $ 377 | $ 134
Cost of Sales |  | 3,033 | 1,284 | 8,015 | 4,375
Gross loss |  | (2,882) | (1,250) | (7,638) | (4,241)
Selling, general and administrative |  | 230 | (12) | 665 | (107)
Income before income taxes |  | (3,112) | (1,238) | (8,303) | (4,134)
Benefit for income taxes |  | 4,927 | 985 | 12,566 | 4,863
Net income from discontinued operations, net of tax |  | 1,815 | (253) | 4,263 | 729
Net loss attributable to noncontrolling interests |  | 137 | 58 | 370 | 193
Net income (loss) attributable to REX common shareholders |  | $ 1,952 | $ (195) | $ 4,633 | $ 922
[1] | Refined coal sales were recorded net of the cost of coal as the Company purchased the coal feedstock from the customer to which the processed refined coal was sold.

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