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v2.4.1.9

Related Party Transactions - Income from non-voting revenues interest and non-voting profits interests in EAM (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2015 | Jan. 31, 2014
Related Party Transactions [Abstract] |  |  |  |
Non-voting revenues interest in EAM | $ 1,862 valu_NonVotingRevenuesInterestInUnconsolidatedEntity | $ 1,767 valu_NonVotingRevenuesInterestInUnconsolidatedEntity | $ 5,498 valu_NonVotingRevenuesInterestInUnconsolidatedEntity | $ 5,028 valu_NonVotingRevenuesInterestInUnconsolidatedEntity
Non-voting profits interest in EAM | 162 valu_NonVotingProfitsInterestInUnconsolidatedEntity | 207 valu_NonVotingProfitsInterestInUnconsolidatedEntity | 497 valu_NonVotingProfitsInterestInUnconsolidatedEntity | 569 valu_NonVotingProfitsInterestInUnconsolidatedEntity
Non-voting Revenues and Non-voting profits interests in EAM Trust | $ 2,024 valu_RevenuesAndProfitsDistributionFromUnconsolidatedEntity | $ 1,974 valu_RevenuesAndProfitsDistributionFromUnconsolidatedEntity | $ 5,995 valu_RevenuesAndProfitsDistributionFromUnconsolidatedEntity | $ 5,597 valu_RevenuesAndProfitsDistributionFromUnconsolidatedEntity

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- Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the income received against non voting profits in unconsolidated entity. + References No definition available. + Details
Name: | valu_NonVotingProfitsInterestInUnconsolidatedEntity
Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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

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- 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