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Licensing Agreements (Details Textual) (CAD)
9 Months Ended 12 Months Ended
Jan. 31, 2013
Apr. 30, 2011
Apr. 30, 2010
Apr. 30, 2012
License Costs 45,000   40,000  
Proceeds from Option Exercises   85,000    
Additional License Costs       45,000
Business Acquisition, Contingent Consideration, Potential Cash Payment 3,000,000      
Royalty Expense 10,000      
Accrued Annual Royalty Payment 10,000