Quarterly report pursuant to Section 13 or 15(d)

7. STOCK OPTIONS AND WARRANTS (Tables)

v3.8.0.1
7. STOCK OPTIONS AND WARRANTS (Tables)
6 Months Ended
Oct. 31, 2017
Employee stock option activity
    Options     Weighted
Average
Exercise Price
    Weighted
Average
Grant Date
Fair Value
per Share
 
                   
Outstanding, April 30, 2017     79,100,000     $ 0.13     $ 0.09  
Issued     7,150,000       0.07       0.04  
Forfeited                  
Exercised                  
Outstanding, October 31, 2017     86,250,000     $ 0.12     $ 0.11  
Exercisable, October 31, 2017     80,750,000     $ 0.12     $  
Vested and expected to vest     85,750,000     $ 0.12     $  
Unvested employee stock option activity
      Options     Weighted
Average
Grant Date
Fair Value
per Share
 
               
  Non-vested, April 30, 2017       6,800,000     $ 0.10  
  Granted       7,150,000       0.07  
  Vested       (8,650,000 )     0.09  
  Forfeited              
  Non-vested, October 31, 2017       5,300,000     $ 0.08  
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  
$ 0.19       25,000,000       0.96     $ 0.19       25,000,000     $ 0.19  
$ 0.11       27,200,000       1.14     $ 0.11       27,200,000     $ 0.11  
$ 0.18       250,000       1.23     $ 0.18       250,000     $ 0.18  
$ 0.06       15,600,000       1.90     $ 0.06       15,600,000     $ 0.06  
$ 0.10       10,450,000       2.76     $ 0.10       8,550,000     $ 0.10  
$ 0.07       600,000       3.50     $ 0.07       600,000     $ 0.07  
$ 0.06       1,250,000       4.93     $ 0.06       1,250,000     $ 0.06  
$ 0.06       1,200,000       4.50     $ 0.06       400,000     $ 0.06  
$ 0.07       1,200,000       4.67     $ 0.07       600,000     $ 0.07  
$ 0.07       1,800,000       4.69     $ 0.07       400,000     $ 0.07  
$ 0.09       1,200,000       2.36     $ 0.09       400,000     $ 0.09  
$ 0.06       500,000       2.47     $ 0.06       500,000     $ 0.06  
Total       86,250,000       1.69     $ 0.12       80,750,000     $ 0.12  
Warrant activity
      Warrants     Weighted
Average
Exercise Price
 
  Outstanding, April 30, 2017       67,853,504     $ 0.13  
  Issued       2,833,333       0.03  
  Expired       (17,614,400 )      
  Outstanding, October 31, 2017       53,072,437       0.12  
  Exercisable, October 31, 2017       53,072,437     $ 0.12  
Schedule of warrants outstanding and exercisable
Exercise Prices   Number of
Warrant Shares
Exercisable at October 31, 2017
    Weighted
Average
Remaining
Contractual
Life
    Weighted
Average
Exercise Price
 
$0.025, $0.03, $0.0575, $0.065, $0.11, $0.12 and $0.18     53,072,437       2.02     $ 0.12  
                         
Five Year Term   –   $0.12     27,468,308       2.16          
Five Year Term   –   $0.18     11,132,000       0.34          
Five Year Term   –   $0.11     10,000,000       2.39          
Five Year Term   –   $0.065     769,231       4.14          
Five Year Term   –   $0.0575     869,565       4.43          
Five Year Term   –   $0.03     833,333       4.56          
Five Year Term   –   $0.025     2,000,000       4.74          
      53,072,437                  
Employee Options [Member]  
Assumptions
    Six Months Ended October 31,  
    2017     2016  
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,  
    2017     2016  
Risk-free interest rate     2.0%       1.8%  
Expected volatility     107%       110%  
Expected lives (years)     5.0       5.0  
Expected dividend yield     0.00%       0.00%