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	9 Months Ended
Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Related Party Transactions [Abstract]
Non-voting revenues interest in EAM	$ 1,767	$ 1,472	$ 5,028	$ 4,280
Non-voting profits interest in EAM	207	153	569	347
Revenues and profits interests in EAM Trust	$ 1,974	$ 1,625	$ 5,597	$ 4,627

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