XML 101 R39.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Investments - Components of assets and liabilities (Parentheticals) (Details 3) - EAM Trust - USD ($) $ in Thousands | Jan. 31, 2016 | Apr. 30, 2015
--- | --- | ---
Schedule Of Equity Method Investments [Line Items] |  |
Payable to VLI for its accrued non-voting revenues and non-voting profits interests | $ 1,901,000 | $ 1,951,000
Percentage of accrued payable non-voting revenues and non-voting profits interests | 90.00% | 90.00%

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

X
- Definition Sum of the carrying values as of the balance sheet date of accrued payable non-voting revenues and non-voting profits interests. + References No definition available. + Details
Name: | valu_AccruedNonVotingRevenuesAndNonVotingProfitsInterestsPayable
Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of accrued payable non-voting revenues and non-voting profits interests. + References No definition available. + Details
Name: | valu_PercentageOfAccruedNonVotingRevenuesAndNonVotingProfitsInterestsPayable
Namespace Prefix: | valu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=valu_EulavAssetManagementLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |