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Note 16 - Paycheck Protection Program Loan (Details Textual) | 3 Months Ended
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Oct. 21, 2021 USD ($)
Paycheck Protection Program CARES Act [Member] |
Debt Instrument, Decrease, Forgiveness | $ 2,331,365

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- Definition Decrease for amounts of indebtedness forgiven by the holder of the debt instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
Name: | us-gaap_DebtInstrumentDecreaseForgiveness
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_DebtInstrumentAxis=valu_PaycheckProtectionProgramCaresActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |