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Note 7 - Related Party Transactions - Non-voting Revenues Interest and Non-voting Profits Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Value Line’s non-voting revenues interest	$ 2,588	$ 1,968
Non-voting profits interest in EAM	283	303
	$ 2,871	$ 2,271

X

- Definition

Represents the income received against non voting profits in unconsolidated entity.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the income received against non voting revenues in unconsolidated entity.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the revenues and profits distribution from unconsolidated entity.

+ References

No definition available.

+ Details

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