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Accounting for the Costs of Computer Software Developed for Internal Use (Detail Textuals) (Computer Software Developed For Internal Use, USD $) | 12 Months Ended
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Apr. 30, 2013 | Apr. 30, 2012 | Apr. 30, 2011
Finite-Lived Intangible Assets [Line Items] |  |  |
Capitalized cost of development of software for internal use | $ 2,457,000 | $ 3,383,000 |
Development costs for the digital production software project | 2,326,000 | 2,153,000 |
Development costs related to a new fulfillment system | 131,000 | 1,230,000 |
Amortization expense | $ 1,295,000 | $ 446,000 | $ 332,000
Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Expected useful life of the asset | 3 years |  |
Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Expected useful life of the asset | 5 years |  |

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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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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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
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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