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Variable Interest Entity (Detail textuals) | 12 Months Ended
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Apr. 30, 2015
EAM Trust |
Variable Interest Entity [Line Items] |
Non-voting profits interest in EAM | 50.00%

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents percentage of non-voting profits interest. + References No definition available. + Details
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Namespace Prefix: | valu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |