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Note 12 - Accounting for the Costs of Computer Software Developed for Internal Use (Details Textual) - USD ($)	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	3 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Production Expenses Attributable to Additional Accelerated Amortization of Software Costs [Member]
Capitalized Computer Software, Amortization	$ 1,239,000
Capitalized Computer Software, Additions	1,681,000	$ 2,422,000
Capitalized Software Development Costs for Project	1,680,000	2,414,000
Capitalized Software Development Costs for New Systems	1,000	8,000
Internal Costs to Develop Software	1,250,000	1,692,000
Third Party Programmers Costs	431,000	730,000
Capitalized Computer Software, Amortization	$ 3,520,000	2,421,000	$ 1,812,000
Accelerated Write Off of Obsolete Software		$ 138,000

X

- 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=66006027&loc=d3e16265-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of 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)(1)
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

X

- Definition

Represents the amount related to accelerated write off of obsolete software.

+ References

No definition available.

+ Details

Name:	valu_AcceleratedWriteOffOfObsoleteSoftware
Namespace Prefix:	valu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

X

- Definition

Represents the capitalized development cost for project during the period.

+ References

No definition available.

+ Details

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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

X

- 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

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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- Details

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X

- Details

Name:	us-gaap_NatureOfExpenseAxis=valu_ProductionExpensesAttributableToAdditionalAcceleratedAmortizationOfSoftwareCostsMember
Namespace Prefix:
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Balance Type:
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