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Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Supplemental Cash Flow Elements [Abstract]
State and local income tax payments	$ 93	$ 86

X

- References

No definition available.

+ Details

Name:	us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount represents State and local income tax payments.

+ References

No definition available.

+ Details

Name:	valu_StateAndLocalIncomeTaxPayments
Namespace Prefix:	valu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration