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Basis of Presentation and Summary of Significant Accounting Policies (Details Narrative) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2016
Jan. 31, 2015
Apr. 30, 2015
Apr. 30, 2014
Accounting Policies [Abstract]            
Cash and cash equivalents $ 700,993 $ 446,145 $ 700,993 $ 446,145 $ 327,298 $ 257,633
Working capital, approximate 2,100,000   2,100,000      
Net loss (449,990) $ (668,204) (547,051) (2,934,932)    
Stock-based compensation expense     665,817 $ 14,148    
Accumulated deficit $ (25,037,455)   $ (25,037,455)   $ (24,490,404)