Related Party Transactions - Income from its non-voting revenues interest and its non-voting profits interests in EAM (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Related Party Transactions [Abstract]
Non-voting revenues interest in EAM	$ 6,767	$ 5,781	$ 5,684
Non-voting profits interest in EAM	732	479	206
Revenues and profits interests in EAM Trust	$ 7,499	$ 6,260	$ 5,890

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