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Stockholders' Equity (Deficiency) (Schedule of Warrants) (Details)

v2.4.0.8
Stockholders' Equity (Deficiency) (Schedule of Warrants) (Details) (Warrant [Member], USD $)
 3 Months Ended 12 Months Ended
Jul. 31, 2014
Apr. 30, 2014
Warrant [Member]
    
Number of Shares    
Balance Outstanding, April 30, 2013 23,144,005 9,090,292
Granted 8,714,519 18,325,553
Exercised    (4,231,840)
Forfeited    (40,000)
Expired      
Balance Outstanding, April 30, 2014 31,858,524 23,144,005
Exercisable, April 30, 2014 31,858,524 18,249,528
Weighted Average Exercise Price    
Balance Outstanding, April 30, 2013 $ 0.31 $ 0.46
Granted $ 0.19 $ 0.26
Exercised    $ 0.19
Forfeited    $ 0.50
Expired      
Balance Outstanding, April 30, 2014 $ 0.27 $ 0.31
Exercisable, April 30, 2014 $ 0.27 $ 0.31
Average Remaining Contractual Term    
Balance Outstanding, April 30, 2014 4 years 10 months 24 days 4 years 7 months 6 days
Exercisable, April 30, 2014 4 years 10 months 24 days 4 years 7 months 6 days
Aggregate Intrinsic Value    
Balance Outstanding, April 30, 2014      
Exercisable, April 30, 2014