Consolidated Condensed Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Net sales and revenue	$ 73,851	$ 65,087	$ 155,065	$ 136,359
Cost of sales	74,137	60,053	150,660	122,937
Gross (loss) profit	(286)	5,034	4,405	13,422
Selling, general and administrative expenses	(1,976)	(1,859)	(4,288)	(3,962)
Interest income	101	124	271	238
Interest expense	(646)	(1,338)	(1,316)	(2,710)
Income from synthetic fuel investments	2,883		2,883
Loss on early termination of debt				(48)
Equity in income of unconsolidated ethanol affiliates	3,761	1,083	9,543	3,930
Losses on derivative financial instruments, net	(757)	(1,878)	(689)	(2,045)
Income from continuing operations before provision for income taxes and discontinued operations	3,080	1,166	10,809	8,825
Provision for income taxes	(1,471)	(622)	(4,188)	(3,181)
Income from continuing operations including noncontrolling interests	1,609	544	6,621	5,644
Income from discontinued operations, net of tax	384	530	794	1,035
Gain on disposal of discontinued operations, net of tax	40	20	174	20
Net income including noncontrolling interests	2,033	1,094	7,589	6,699
Net loss (income) attributable to noncontrolling interests	314	140	(590)	(1,277)
Net income attributable to REX common shareholders	2,347	1,234	6,999	5,422
Weighted average shares outstanding – basic (in Shares)	9,513	9,790	9,473	9,815
Basic income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 0.20	$ 0.07	$ 0.64	$ 0.44
Basic income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)	$ 0.04	$ 0.06	$ 0.08	$ 0.11
Basic income per share on disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)	$ 0.01		$ 0.02
Basic net income per share attributable to REX common shareholders (in Dollars per share)	$ 0.25	$ 0.13	$ 0.74	$ 0.55
Weighted average shares outstanding – diluted (in Shares)	9,550	9,976	9,557	10,010
Diluted income per share from continuing operations attributable to REX common shareholders (in Dollars per share)	$ 0.20	$ 0.07	$ 0.63	$ 0.44
Diluted income per share from discontinued operations attributable to REX common shareholders (in Dollars per share)	$ 0.04	$ 0.05	$ 0.08	$ 0.10
Diluted income per share on disposal of discontinued operations attributable to REX common shareholders (in Dollars per share)	$ 0.01		$ 0.02
Diluted net income per share attributable to REX common shareholders (in Dollars per share)	$ 0.25	$ 0.12	$ 0.73	$ 0.54
Amounts attributable to REX common shareholders:
Income from continuing operations, net of tax	1,923	684	6,031	4,367
Income from discontinued operations, net of tax	424	550	968	1,055
Net income	$ 2,347	$ 1,234	$ 6,999	$ 5,422