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Variable Interest Entity (Detail textuals) (EAM Trust) | 9 Months Ended
--- | ---
Jan. 31, 2014
EAM Trust |
Variable Interest Entity [Line Items] |
Non-voting profits interest in EAM | 50.00%

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

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