9. STOCK OPTIONS AND WARRANTS (Tables)
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12 Months Ended |
Apr. 30, 2015 |
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
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Assumptions |
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April 30, |
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2015 |
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|
2014 |
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|
2013 |
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Risk-free interest rate |
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|
2 |
% |
|
|
|
|
|
|
|
|
Expected volatility |
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|
145 |
% |
|
|
|
|
|
|
|
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Expected lives (years) |
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5 |
|
|
|
|
|
|
|
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Expected dividend yield |
|
|
0.00 |
% |
|
|
0.00 |
% |
|
|
0.00 |
% |
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Unvested employee stock option activity |
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|
|
Options
Outstanding |
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|
|
Weighted
Average Grant Date Fair Value per Share |
|
Nonvested, April 30, 2012 |
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$ |
|
|
Granted |
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|
|
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Vested |
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|
|
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Forfeited |
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Nonvested, April 30, 2013 |
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|
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Granted |
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Vested |
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|
|
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Forfeited |
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Nonvested, April 30, 2014 |
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|
|
|
|
|
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Granted |
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|
47,200,000 |
|
|
$ |
0.14 |
|
Vested |
|
|
40,600,000 |
|
|
|
0.15 |
|
Forfeited |
|
|
|
|
|
|
|
|
Nonvested, April 30, 2015 |
|
|
6,600,000 |
|
|
$ |
0.10 |
|
|
Employee stock option activity |
|
|
|
Options
Outstanding |
|
|
|
Weighted
Average Grant Date Fair Value per Share |
|
Nonvested, April 30, 2012 |
|
|
|
|
|
$ |
|
|
Granted |
|
|
|
|
|
|
|
|
Vested |
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|
|
|
|
|
|
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Forfeited |
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|
|
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Nonvested, April 30, 2013 |
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|
|
|
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Granted |
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Vested |
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|
|
|
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Forfeited |
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|
|
|
|
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Nonvested, April 30, 2014 |
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|
|
|
|
|
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Granted |
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|
5,250,000 |
|
|
$ |
0.19 |
|
Vested |
|
|
5,250,000 |
|
|
|
0.19 |
|
Forfeited |
|
|
|
|
|
|
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Nonvested, April 30, 2015 |
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$ |
|
|
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Range of outstanding stock options |
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Exercise Prices |
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Range of Exercise Price |
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$ |
0.19 |
|
|
$ |
0.11 |
|
|
$ |
0.18 |
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Number of Options |
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|
25,000,000 |
|
|
|
27,200,000 |
|
|
|
250,000 |
|
Weighted Average Remaining Contractual Life (years) |
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|
4.42 |
|
|
|
4.67 |
|
|
|
4.98 |
|
Weighted Average Stock Price |
|
$ |
0.19 |
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|
$ |
0.10 |
|
|
$ |
0.18 |
|
Number of Options Exercisable |
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|
25,000,000 |
|
|
|
27,200,000 |
|
|
|
250,000 |
|
Weighted Average Contractual Life (years) |
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|
5 |
|
|
|
5 |
|
|
|
5 |
|
Weighted Average Exercise Price |
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$ |
0.19 |
|
|
$ |
0.10 |
|
|
$ |
0.18 |
|
|
Warrant activity |
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|
|
Warrants |
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|
Weighted
Average Price |
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|
Weighted
Average Fair Value |
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Outstanding, April 30, 2012 |
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|
|
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$ |
|
|
|
$ |
|
|
Issued |
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|
59,433,600 |
|
|
|
0.125 |
|
|
|
0.064 |
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Exercised |
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|
|
|
|
|
|
|
|
|
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Outstanding, April 30, 2013 |
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|
59,433,600 |
|
|
|
0.125 |
|
|
|
0.064 |
|
Issued |
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|
|
|
|
|
|
|
|
|
|
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Exercised |
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|
(1,768,000 |
) |
|
|
|
|
|
|
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Outstanding, April 30, 2014 |
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|
57,665,600 |
|
|
|
0.18 |
|
|
|
0.065 |
|
Issued |
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|
15,854,308 |
|
|
|
|
|
|
|
|
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Exercised |
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(550,000 |
) |
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|
|
|
|
|
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Outstanding, April 30, 2015 |
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|
72,969,908 |
|
|
|
|
|
|
|
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Exercisable, April 30, 2015 |
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|
72,969,908 |
|
|
$ |
0.17 |
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|
$ |
0.075 |
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Schedule of warrants outstanding and exercisable |
Range of Exercise Prices |
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Number of Warrant
Shares Exercisable at 04/30/2015 |
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|
Weighted Average
Remaining Contractual Life |
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|
Exercisable Weighted
Average Exercise Price |
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$0.075, $0.11, $0.12, $0.18 and $0.25 |
|
|
72,969,908 |
|
|
|
2.86 |
|
|
|
0.17 |
|
|
|
|
|
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Five Year Term - $0.075 |
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|
1,056,000 |
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|
2.45 |
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|
|
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Five Year Term - $0.12 |
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|
18,347,508 |
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2.75 |
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|
|
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Five Year Term - $0.18 |
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|
19,811,200 |
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|
2.67 |
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|
|
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Five Year Term - $0.25 |
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|
18,755,200 |
|
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|
2.68 |
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|
|
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Five Year Term - $0.11 |
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|
10,000,000 |
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|
|
4.90 |
|
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Nine Month Term - $0.11 |
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|
5,000,000 |
|
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|
0.67 |
|
|
|
|
|
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72,969,908 |
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