Quarterly report pursuant to Section 13 or 15(d)

5. STOCK OPTIONS AND WARRANTS (Tables)

v3.10.0.1
5. STOCK OPTIONS AND WARRANTS (Tables)
6 Months Ended
Oct. 31, 2018
Employee stock option activity
    Options     Weighted
Average
Exercise Price
    Weighted
Average
Grant Date
Fair Value
per Share
 
                   
Outstanding, April 30, 2018     95,250,000     $ 0.11     $ 0.11  
Issued     1,200,000       0.05       0.05  
Forfeited                  
Exercised                  
Outstanding, October 31, 2018     96,450,000     $ 0.11     $ 0.11  
Exercisable, October 31, 2018     93,950,000     $ 0.12     $  
Vested and expected to vest     96,450,000     $ 0.11     $  
Unvested employee stock option activity
      Options     Weighted
Average
Grant Date
Fair Value
 
                   
Non-vested, April 30, 2018       7,200,000     $ 0.06  
Granted       1,200,000       0.05  
Vested       (5,900,000 )     0.06  
Forfeited              
Non-vested, October 31, 2018       2,500,000     $ 0.06  
Range of outstanding stock options
Exercise Price     Number of Options Outstanding     Weighted Average Remaining Contractual Life (years) of Outstanding Options     Weighted Average Exercisable Price     Number of Options Exercisable     Weighted Average Exercise Price of Exercisable Options  
$ 0.190       25,000,000       0.46     $ 0.190       25,000,000     $ 0.190  
$ 0.110       27,200,000       0.61     $ 0.110       27,200,000     $ 0.110  
$ 0.184       250,000       0.73     $ 0.184       250,000     $ 0.184  
$ 0.063       15,600,000       1.30     $ 0.063       15,600,000     $ 0.063  
$ 0.104       10,450,000       2.16     $ 0.104       10,450,000     $ 0.104  
$ 0.0685       600,000       2.50     $ 0.0685       600,000     $ 0.0685  
$ 0.058       2,450,000       2.74     $ 0.058       2,450,000     $ 0.058  
$ 0.0734       1,200,000       3.50     $ 0.0734       1,200,000     $ 0.0734  
$ 0.0729       1,800,000       3.69     $ 0.0729       1,600,000     $ 0.0729  
$ 0.089       1,200,000       1.86     $ 0.089       1,200,000     $ 0.089  
$ 0.0553       500,000       1.97     $ 0.0553       500,000     $ 0.0553  
$ 0.0534       1,200,000       4.85     $ 0.0534       400,000     $ 0.0534  
$ 0.0558       9,000,000       2.50     $ 0.0558       7,500,000     $ 0.0558  
  Total       96,450,000       1.28     $ 0.12       93,950,000     $ 0.12  
Warrant activity
      Warrants     Weighted
Average
Exercise Price
 
Outstanding, April 30, 2018       33,993,104     $    0.10  
Issued       3,311,966       0.02  
Expired              
Outstanding, October 31, 2018       37,305,070       0.09  
Exercisable, October 31, 2018       37,305,070     $ 0.09  
Schedule of warrants outstanding and exercisable
Exercise Prices  

Number of
Warrant Shares
Exercisable at

October 31, 2018

    Weighted
Average
Remaining
Contractual
Life
    Weighted
Average
Exercise Price
 
$0.018, $0.025, $0.026, $0.03, $0.0575, $0.065, $0.11 and $0.12     37,305,070       2.42     $    0.09  
                         
Five Year Term   –   $0.12     17,854,308       2.12          
Five Year Term   –   $0.11     10,000,000       1.39          
Five Year Term   –   $0.065     769,231       3.14          
Five Year Term   –   $0.0575     869,565       3.43          
Five Year Term   –   $0.03     2,500,000       4.07          
Five Year Term   –   $0.026     1,923,077       4.66          
Five Year Term   –   $0.025     2,000,000       3.74          
Five Year Term   –   $0.018     1,388,889       4.58          
      37,305,070                  
Employee Options [Member]  
Assumptions
    Six Months Ended October 31,  
    2018     2017  
Risk-free interest rate           2.0 %
Expected volatility           107 %
Expected lives (years)           2.5  
Expected dividend yield           0.00 %
Non-Employee Options [Member]  
Assumptions
    Six Months Ended October 31,  
    2018     2017  
Risk-free interest rate     2.8 %     1.8 %
Expected volatility     97 %     108 %
Expected lives (years)     4.85       5.0  
Expected dividend yield     0.00 %     0.00 %