Note 3 - Related Party Transactions - Non-voting Revenues Interest and Non-voting Profits Interests (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Non-voting revenues interest in EAM	$ 15,190	$ 11,184	$ 8,260
Non-voting profits interest in EAM	2,131	1,166	1,049
Revenues and Profits Distribution from Unconsolidated Entity	$ 17,321	$ 12,350	$ 9,309

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

No definition available.

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