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Note 13 - Treasury Stock and Repurchase Program (Details Textual)	Apr. 17, 2020 USD ($)
April 2020 Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount	$ 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_April2020ShareRepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: