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Related Party Transactions (Detail Textuals) (USD $) | 9 Months Ended |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2014 Value Line Inc | Jan. 31, 2013 Value Line Inc | Jan. 31, 2014 Value Line Inc Investment in EAM Trust | Apr. 30, 2013 Value Line Inc Investment in EAM Trust | Jan. 31, 2014 EAM Trust | Oct. 31, 2013 EAM Trust | Jul. 31, 2013 EAM Trust | Jan. 31, 2013 EAM Trust | Oct. 31, 2012 EAM Trust | Jul. 31, 2012 EAM Trust | Jan. 31, 2014 EAM Trust | Jan. 31, 2014 EAM Trust Minimum | Jan. 31, 2014 EAM Trust Maximum
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets of value line funds managed by EAM |  |  |  |  |  |  | $ 2,300,000,000 |  |  | $ 2,100,000,000 |  |  | $ 2,300,000,000 |  |
Percentage of assets increased in funds |  |  |  |  |  |  |  |  |  |  |  |  | 8.30% |  |
Investment management fee revenues from its mutual fund and separate accounts business |  |  |  |  |  |  |  |  |  |  |  |  |  | 41.00% | 55.00%
Percentage of non voting profits interests due each quarter from EAM |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% |
Non-voting profits interest in EAM |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |
Non voting profits interest in variable entity not yet paid |  |  |  |  | 1,953,000 | 1,621,000 |  |  |  |  |  |  |  |  |
Reimbursed income |  |  | 113,000 | 138,000 |  |  |  |  |  |  |  |  |  |  |
Federal income tax payments to the parent | $ 1,054,000 | $ 1,030,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership in outstanding shares of common stock of the company by parent |  |  | 87.91% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of non-voting revenues interest in unconsolidated entity |  |  |  |  |  |  | 47.91% | 47.27% | 46.66% | 46.15% | 45.87% | 46.20% |  |  |

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- Definition Repayment received or receivable for expenses incurred on behalf of a client or customer, other than those reimbursements received by landlords from tenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21915142&loc=d3e60722-111653 + Details
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- Definition Amount represents Federal income tax payments to the Parent. + References No definition available. + Details
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- Definition Represents distributable amounts earned through the balance sheet date, which is included in the Investment in variable interest entity and not yet paid. + References No definition available. + Details
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- Definition Represents percentage of non-voting revenues interest based on the amount of EAM's adjusted gross revenues, excluding ES's distribution revenues. + References No definition available. + Details
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