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Note 11 - Treasury Stock and Repurchase Program (Details Textual) - USD ($) | Mar. 14, 2022 | Jul. 16, 2021
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July 2021 Share Repurchase Program [Member] |  |
Stock Repurchase Program, Authorized Amount | $ 2,000,000 | $ 2,000,000

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=valu_July2021ShareRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |