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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		6 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Value Line’s non-voting revenues interest	$ 2,095	$ 2,039	$ 4,063	$ 4,017
Non-voting profits interest in EAM	289	198	592	356
	$ 2,384	$ 2,237	$ 4,655	$ 4,373

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