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Subsequent Events - Schedule of Pro Forma Impact of the Split on Reported Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jul. 31, 2025 | Jul. 31, 2024 | Jul. 31, 2025 | Jul. 31, 2024
Schedule Of Pro Forma Impact Of The Split On Reported Earnings Abstract |  |  |  |
Net income attributable to REX common shareholders | $ 7,111 | $ 12,378 | $ 15,789 | $ 22,569
Pro forma weighted average shares outstanding – basic | 33,010 | 35,095 | 33,388 | 35,055
Pro forma basic net income per share attributable to REX common shareholders | $ 220 | $ 350 | $ 470 | $ 640
Pro forma weighted average shares outstanding – diluted | 33,010 | 35,342 | 33,388 | 35,296
Pro forma diluted net income per share attributable to REX common shareholders | $ 220 | $ 350 | $ 470 | $ 640

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