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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, 2019 | Oct. 31, 2018 | Oct. 31, 2019 | Oct. 31, 2018
Value Line’s non-voting revenues interest | $ 2,768 | $ 2,095 | $ 5,356 | $ 4,063
Non-voting profits interest in EAM | 290 | 289 | 573 | 592
| $ 3,058 | $ 2,384 | $ 5,929 | $ 4,655

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