Summary of Significant Accounting Policies - Liquidity and Basis of Presentation (Details Narrative) (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Summary Of Significant Accounting Policies - Liquidity And Basis Of Presentation Details Narrative
Net loss	$ (2,609,000)	$ (4,625,000)	$ (3,259,000)
Net cash used in operating activities	$ (1,554,000)	$ (3,882,000)	$ (1,218,000)