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Other assets (Tables) (USD $)
In Millions, unless otherwise specified

6 Months Ended

Jul. 31, 2012

Other Assets [Abstract]

decrease in other assets

$ 1.1

Other assets in thousands [Table Text Block]

	July 31, 2012			January 31, 2012
Other assets		$2,735			$3,860

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- Definition

Amount of significant reductions in the period of other assets (current, noncurrent, or unclassified).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

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- Definition

Tabular disclosure of the carrying amounts of other assets. This disclosure includes other current assets and other noncurrent assets.

+ References

No definition available.

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