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Organization and Summary of Significant Accounting Policies (Detail Textuals) (USD $) In Thousands, unless otherwise specified |  |  | 9 Months Ended
--- | --- | --- | ---
Jan. 31, 2014 | Apr. 30, 2013 | Jan. 31, 2014 EAM Trust | Jan. 31, 2014 EAM Trust Minimum | Jan. 31, 2014 EAM Trust Maximum
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investment management fee revenues from its mutual fund and separate accounts business |  |  |  | 41.00% | 55.00%
Non-voting profits interest ("Profits Interest") |  |  | 50.00% |  |
Percentage of non voting profits interests due each quarter from EAM |  |  |  | 90.00% |
Short term investments | $ 3,858 | $ 6,312 |  |  |

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- Details
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- Definition Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph g -Article 7 + Details
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- Definition Represents percentage of non-voting profits interest. + 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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- Definition Represents the stated percentage of non voting profits interests due from ex-subsidiary payable to parent under agreement. + References No definition available. + Details
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