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Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Deficiency (Schedule of Stock Options Activity) (Details)

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Stockholders' Deficiency (Schedule of Stock Options Activity) (Details) (USD $)
 3 Months Ended
Jul. 31, 2014
Stock Incentive Plan and Stock Option Grants to Employees and Directors [Member]
  
Number of Shares  
Balance Outstanding, April 30, 2014 10,476,412
Granted   
Exercised   
Forfeited (10,000)
Expired   
Balance Outstanding, July 31, 2014 10,466,412
Exercisable, July 31, 2014 5,082,712
Weighted Average Exercise Price  
Balance Outstanding, April 30, 2014 $ 0.35
Weighted average exercise price of options granted   
Exercised   
Forfeited   
Expired   
Balance Outstanding, July 31, 2014 $ 0.23
Exercisable, July 31, 2014 $ 0.27
Weighted Average Remaining Contractual Term  
Balance Outstanding, July 31, 2014 3 years 6 months
Exercisable, July 31, 2014 3 years 4 months 24 days
Aggregate Intrinsic Value  
Balance Outstanding, July 31, 2014   
Exercisable, July 31, 2014   
Stock Option Grants to Non-Employees [Member]
  
Number of Shares  
Balance Outstanding, April 30, 2014 270,000
Granted   
Exercised   
Forfeited (50,000)
Expired   
Balance Outstanding, July 31, 2014 220,000
Exercisable, July 31, 2014 73,333
Weighted Average Exercise Price  
Balance Outstanding, April 30, 2014 $ 0.35
Weighted average exercise price of options granted   
Exercised   
Forfeited $ 0.19
Expired   
Balance Outstanding, July 31, 2014 $ 0.30
Exercisable, July 31, 2014 $ 0.30
Weighted Average Remaining Contractual Term  
Balance Outstanding, July 31, 2014 2 years 9 months 18 days
Exercisable, July 31, 2014 2 years 9 months 18 days
Aggregate Intrinsic Value  
Balance Outstanding, July 31, 2014 2.8
Exercisable, July 31, 2014 $ 2.8