XML 21 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6

Fair Value (Detail) - Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Balance, January 31, 2013	$ 252	$ 252
Balance, April 30, 2013	$ 252	$ 252

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- 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