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Note 5 - Employees' Profit Sharing and Savings Plan (Details Textual) - USD ($)	9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 321,000	$ 322,000
Deferred Compensation Arrangement with Individual, Plan Reimbursement for Fees	$ 277,000

X

- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The reimbursement to a plan of fees received indirectly by the plan sponsor.

+ References

No definition available.

+ Details

Name:	valu_DeferredCompensationArrangementWithIndividualPlanReimbursementForFees
Namespace Prefix:	valu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration