Annual report pursuant to Section 13 and 15(d)

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

v3.2.0.727
Stockholders' Equity (Deficiency) (Schedule of Stock Options Activity) (Details) - USD ($)
 12 Months Ended
Apr. 30, 2015
Stock Incentive Plan and Stock Option Grants to Employees and Directors [Member]  
Number of Shares  
Balance Outstanding 10,476,412
Granted 3,900,000
Exercised  
Forfeited (170,000)
Expired  
Balance Outstanding 14,206,412
Exercisable 5,660,470
Weighted Average Exercise Price  
Balance Outstanding $ 0.32
Weighted average exercise price of options granted 0.17
Forfeited 0.34
Balance Outstanding 0.21
Exercisable $ 0.26
Weighted Average Remaining Contractual Term  
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 3 years 5 months 12 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 3 years 5 months 12 days
Exercisable 2 years 10 months 6 days
Aggregate Intrinsic Value  
Balance Outstanding $ 103,000
Exercisable $ 4,000
Stock Option Grants to Non-Employees [Member]  
Number of Shares  
Balance Outstanding 270,000
Granted  
Exercised  
Forfeited (50,000)
Expired  
Balance Outstanding 220,000
Exercisable 73,333
Weighted Average Exercise Price  
Balance Outstanding $ 0.28
Forfeited 0.19
Balance Outstanding 0.30
Exercisable $ 0.30
Weighted Average Remaining Contractual Term  
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 2 years 1 month 6 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2 2 years 1 month 6 days
Exercisable 2 years 3 months 18 days
Aggregate Intrinsic Value  
Balance Outstanding  
Exercisable