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Related Party Transactions (Detail Textuals 1) (Value Line Core Bond Fund, USD $) In Millions, unless otherwise specified | Mar. 31, 2013
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Value Line Core Bond Fund |
Related Party Transaction [Line Items] |
Assets under management | $ 100

X
- Definition The carrying amount of assets an investment adviser manages on behalf of investors. + References No definition available. + Details
Name: | us-gaap_AssetsUnderManagementCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration