XML 33 R57.htm IDEA: XBRL DOCUMENT
v2.4.0.8

FAIR VALUE (Details) - Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract] |  |  |
Balance | $ 289 | $ 252 | $ 219
Fair value adjustment | $ 37 | $ 33 |

X
- Details
Name: | rex_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract
Namespace Prefix: | rex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant