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Organization and Summary of Significant Accounting Policies (Detail Textuals) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2015	Apr. 30, 2014
Schedule of Equity Method Investments [Line Items]
Cash equivalents	5,005us-gaap_CashAndCashEquivalentsFairValueDisclosure	$ 5,482us-gaap_CashAndCashEquivalentsFairValueDisclosure
EAM Trust
Schedule of Equity Method Investments [Line Items]
Non-voting profits interest ("Profits Interest")	50.00%valu_NonVotingProfitsInterestPercent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = valu_EulavAssetManagementLlcMember
EAM Trust | Minimum
Schedule of Equity Method Investments [Line Items]
Investment management fee revenues from its mutual fund and separate accounts business	41.00%valu_NonVotingRevenuesInterestPercent / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = valu_EulavAssetManagementLlcMember
Percentage of non voting profits interests due each quarter from EAM	90.00%valu_PercentageOfNonVotingProfitsInterestsDueFromExSubsidiaryPayableToParentUnderAgreement / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = valu_EulavAssetManagementLlcMember
EAM Trust | Maximum
Schedule of Equity Method Investments [Line Items]
Investment management fee revenues from its mutual fund and separate accounts business	55.00%valu_NonVotingRevenuesInterestPercent / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = valu_EulavAssetManagementLlcMember

X

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

+ Details

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X

- Definition

Represents percentage of non-voting profits interest.

+ References

No definition available.

+ Details

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X

- Definition

Represents percentage of non-voting revenues interest based on the amount of EAM's adjusted gross revenues, excluding ES's distribution revenues.

+ References

No definition available.

+ Details

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X

- Definition

Represents the stated percentage of non voting profits interests due from ex-subsidiary payable to parent under agreement.

+ References

No definition available.

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