Annual report pursuant to Section 13 and 15(d)

SHAREHOLDERS' EQUITY (Details 1)

v3.2.0.727
SHAREHOLDERS' EQUITY (Details 1) - $ / shares
12 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Exercise price   $ 78.10
Expected stock price volatility   68.60%
Risk-free rate of interest   0.90%
Expected term (years) 5 years 5 years
Minimum [Member]    
Exercise price $ 4.84  
Expected stock price volatility 103.00%  
Risk-free rate of interest 1.10%  
Maximum [Member]    
Exercise price $ 26.40  
Expected stock price volatility 131.50%  
Risk-free rate of interest 1.30%