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DISCONTINUED OPERATIONS (Details) - Schedule Of Discontinued Items Statement of Operations - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Schedule Of Discontinued Items Statement of Operations [Abstract]      
Net sales and revenue [1] $ 400 $ 182 $ 334
Cost of Sales 8,602 5,854 8,251
Gross loss (8,202) (5,672) (7,917)
Selling, general and administrative 698 22 (274)
Loss before income taxes (8,900) (5,694) (7,643)
Benefit for income taxes 13,295 6,554 10,828
Net income from discontinued operations, net of tax 4,395 860 3,185
Net loss attributable to noncontrolling interests [2] 397 261 340
Net income attributable to REX common shareholders $ 4,792 $ 1,121 $ 3,525
[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.
[2] Net loss attributable to noncontrolling interest represents the minority investor’s share of the loss before income taxes as noncontrolling interests does not include any gain from the refined coal tax credits.