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Organization, Use of Estimates and Basis of Presentation (Details Textual) - USD ($)	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Apr. 30, 2015	Apr. 30, 2014
Working Capital Deficit	$ 4,800,000
Cash and Cash Equivalents, at Carrying Value, Total	6,760,000	$ 6,722,000	$ 9,357,000	$ 9,561,000
Unrecognized Tax Benefits	100,000		$ 100,000
Income Tax Expense (Benefit)	$ 6,000	$ 5,000

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