Organization and Summary of Significant Accounting Policies (Detail Textuals) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Schedule of Equity Method Investments [Line Items]
Cash equivalents	$ 5,272	$ 5,482
EAM Trust
Schedule of Equity Method Investments [Line Items]
Non-voting profits interest ("Profits Interest")	50.00%
EAM Trust | Minimum
Schedule of Equity Method Investments [Line Items]
Investment management fee revenues from its mutual fund and separate accounts business	41.00%
Percentage of non voting profits interests due each quarter from EAM	90.00%
EAM Trust | Maximum
Schedule of Equity Method Investments [Line Items]
Investment management fee revenues from its mutual fund and separate accounts business	55.00%