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NET INCOME PER SHARE FROM CONTINUING OPERATIONS (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Schedule of Earnings Per Share, Basic and Diluted [Abstract]
Basic net income per share attributable to REX common shareholders (in Dollars)			$ 31,436
Basic net income per share attributable to REX common shareholders	6,596	6,587	7,297
Basic net income per share attributable to REX common shareholders (in Dollars per share)			$ 4.31
Effect of restricted stock			10
Diluted net income per share attributable to REX common shareholders (in Dollars)			$ 31,436
Diluted net income per share attributable to REX common shareholders	6,596	6,587	7,307
Diluted net income per share attributable to REX common shareholders (in Dollars per share)			$ 4.30

X

- Definition

Amount of income (loss) from continuing operations attributable to the parent basic. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Amount of income (loss) from continuing operations attributable to the parent diluted. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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