Summary of Significant Accounting Policies - Liquidity and Basis of Presentation (Details Narrative) - USD ($)	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014
Summary Of Significant Accounting Policies - Liquidity And Basis Of Presentation Details Narrative
Net loss	$ (3,829,000)	$ (2,609,000)
Net cash used in operating activities	$ (2,581,000)	$ (1,554,000)