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Accounting for the Costs of Computer Software Developed for Internal Use (Detail Textuals) (USD $) | 9 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014
Internal Use Software [Abstract] |  |
Capitalized cost of development of software for internal use | $ 1,802,000 us-gaap_CapitalizedComputerSoftwareAdditions | $ 1,874,000 us-gaap_CapitalizedComputerSoftwareAdditions
Development costs for digital production software project | 1,792,000 valu_CapitalizedSoftwareDevelopmentCostsForProject | 1,823,000 valu_CapitalizedSoftwareDevelopmentCostsForProject
Development costs related to new fulfillment system | 10,000 valu_CapitalizedSoftwareDevelopmentCostsForNewSystems | 51,000 valu_CapitalizedSoftwareDevelopmentCostsForNewSystems
Internal costs to develop software | 1,195,000 valu_InternalCostsToDevelopSoftware | 1,255,000 valu_InternalCostsToDevelopSoftware
Third party programmers' costs | 607,000 valu_ThirdPartyProgrammersCosts | 619,000 valu_ThirdPartyProgrammersCosts
Expected useful life of asset | 5 years |
Amortization expense | $ 1,683,000 us-gaap_CapitalizedComputerSoftwareAmortization | $ 1,310,000 us-gaap_CapitalizedComputerSoftwareAmortization

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- Definition Additions made to capitalized computer software costs during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
Name: | us-gaap_CapitalizedComputerSoftwareAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
Name: | us-gaap_CapitalizedComputerSoftwareAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the capitalized development cost for new system during the period. + References No definition available. + Details
Name: | valu_CapitalizedSoftwareDevelopmentCostsForNewSystems
Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the capitalized development cost for project during the period. + References No definition available. + Details
Name: | valu_CapitalizedSoftwareDevelopmentCostsForProject
Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the internal costs to develop software. + References No definition available. + Details
Name: | valu_InternalCostsToDevelopSoftware
Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Definition Represents the third party programmer costs. + References No definition available. + Details
Name: | valu_ThirdPartyProgrammersCosts
Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration