Variable Interest Entity (Detail textuals)	9 Months Ended
Jan. 31, 2013
Variable Interest Entity [Abstract]
Non-voting profits interest in EAM	50.00%

Represents percentage of non-voting profits interest.

No definition available.

Name:	valu_NonVotingProfitsInterestPercent
Namespace Prefix:	valu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration