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Note 13 - Gain on Sale of Operating Facility (Details Textual) |  | 3 Months Ended
--- | --- | ---
Jul. 29, 2016 USD ($) ft² | Jul. 31, 2016 USD ($) ft² | Jul. 31, 2015 USD ($)
Fulfillment and Warehouse Facility [Member] |  |  |
Area of Real Estate Property | ft² | 85,000 | 24,000 |
Proceeds from Sale of Property, Plant, and Equipment | $ 11,555,000 |  |
Gain Loss on Disposition of Assets, Net of Tax |  | $ 5,280,000 |
Proceeds from Sale of Property, Plant, and Equipment |  | $ 11,555,000 |

X
- Definition Area of a real estate property. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property, net of tax. + References No definition available. + Details
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Namespace Prefix: | valu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |