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Investments - Components of EAM's investment management operations (Parentheticals) (Details 2)	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
EAM Trust
Schedule of Investments [Line Items]
Non-voting profits interest ("Profits Interest")	50.00%	50.00%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Represents percentage of non-voting profits interest.

+ References

No definition available.

+ Details

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- Details

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