Related Party Transactions - Income from non-voting revenues interest and non-voting profits interests in EAM (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Related Party Transactions [Abstract]
Non-voting revenues interest in EAM	$ 1,803	$ 1,663	$ 3,636	$ 3,261
Non-voting profits interest in EAM	146	191	335	362
Revenues and profits interests in EAM Trust	$ 1,949	$ 1,854	$ 3,971	$ 3,623

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