Licensing Agreements (Details Textual)	12 Months Ended
	Apr. 30, 2013 CAD	Apr. 30, 2011 CAD	Apr. 30, 2010 CAD	Apr. 30, 2013 USD ($)	Apr. 30, 2012 CAD
License Costs			40,000
Proceeds from Option Exercises		85,000
Additional License Costs					45,000
Business Acquisition Contingent Consideration Potential Cash Payments				3,000,000
Royalty Expense	10,000
Accrued Annual Royalty Payment	10,000