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Note 3 - Related Party Transactions - Schedule of Non Voting Revenues Interest and Non Voting Profits Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Non-voting revenues interest in EAM	$ 7,195	$ 7,211	$ 7,346
Non-voting profits interest in EAM	519	440	624
	$ 7,714	$ 7,651	$ 7,970

X

- Definition

Represents the income received against non voting profits in unconsolidated entity.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the income received against non voting revenues in unconsolidated entity.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the revenues and profits distribution from unconsolidated entity.

+ References

No definition available.

+ Details

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