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Variable Interest Entity (Detail textuals) | 12 Months Ended
--- | ---
Apr. 30, 2013
Variable Interest Entity [Abstract] |
Non-voting profits interest in EAM | 50.00%

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

X
- Details
Name: | valu_VariableInterestEntityAbstract
Namespace Prefix: | valu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration