Quarterly report pursuant to Section 13 or 15(d)

STOCK OPTION COMPENSATION EXPENSE (Details)

v3.3.1.900
STOCK OPTION COMPENSATION EXPENSE (Details)
6 Months Ended
Oct. 31, 2015
$ / shares
Expected term (years) 5 years 1 month 24 days
Maximum [Member]  
Exercise price $ 1.32
Expected stock price volatility 104.10%
Risk-free rate of interest 1.60%
Minimum [Member]  
Exercise price $ 1.19
Expected stock price volatility 101.70%
Risk-free rate of interest 1.40%