| Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
This table does not include the special warrants; see Special Warrant section below:
|
Range of
exercise
Prices
|
|
|
Number of
warrants
Outstanding
|
|
|
Weighted
average
remaining
contractual
life (years)
|
|
|
Weighted
average
exercise
price of
outstanding
Warrants
|
|
|
Number of
warrants
Exercisable
|
|
|
Weighted
average
exercise
price of
exercisable
Warrants
|
|
| $ |
0.49 |
|
|
|
35,782,952 |
|
|
|
2.97 |
|
|
$ |
0.49 |
|
|
|
35,782,952 |
|
|
$ |
0.49 |
|
| |
0.50 |
|
|
|
2,736,500 |
|
|
|
3.23 |
|
|
|
0.50 |
|
|
|
2,736,500 |
|
|
|
0.50 |
|
| |
0.60 |
|
|
|
17,500,000 |
|
|
|
3.00 |
|
|
|
0.60 |
|
|
|
17,500,000 |
|
|
|
0.60 |
|
| |
0.75 |
|
|
|
1,042,738 |
|
|
|
2.62 |
|
|
|
0.75 |
|
|
|
1,042,738 |
|
|
|
0.75 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
57,062,190 |
|
|
|
2.98 |
|
|
$ |
0.53 |
|
|
|
57,062,190 |
|
|
$ |
0.53 |
|
|
The following table summarizes the significant terms of warrants outstanding at May 31, 2018. These warrants were granted as part of financing agreements. This table includes the 205,238 Unit Warrants:
| |
|
|
|
|
|
|
|
Weighted
|
|
|
Weighted
|
|
|
|
|
|
|
Weighted
|
|
| |
|
|
|
|
|
|
|
average
|
|
|
average
|
|
|
|
|
|
|
average
|
|
|
Range of
|
|
|
Number of
|
|
|
remaining
|
|
|
exercise
|
|
|
|
|
|
|
exercise
|
|
|
exercise
|
|
|
warrants
|
|
|
contractual
|
|
|
price of
|
|
|
Number of
|
|
|
price of
|
|
|
Prices
|
|
|
Outstanding
|
|
|
life (years)
|
|
|
outstanding Warrants
|
|
|
warrants Exercisable
|
|
|
exercisable Warrants
|
|
| $ |
0.75 |
|
|
|
2,825,988 |
|
|
|
3.33 |
|
|
$ |
0.75 |
|
|
|
2,825,988 |
|
|
$ |
0.75 |
|
| |
0.60 |
|
|
|
1,875,000 |
|
|
|
4.96 |
|
|
|
0.60 |
|
|
|
1,875,000 |
|
|
|
0.60 |
|
| |
|
|
|
|
4,700,988 |
|
|
|
3.98 |
|
|
|
0.69 |
|
|
|
4,700,988 |
|
|
|
0.69 |
|
|
| Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
This table does not include the special warrants; see Special Warrant section below.
| |
|
Number of
Shares
|
|
|
Weighted
Average
Exercise
Price
|
|
|
Warrants outstanding at May 31, 2018
|
|
|
4,700,988 |
|
|
$ |
0.62 |
|
|
Granted
|
|
|
52,776,202 |
|
|
$ |
0.58 |
|
|
Exercised
|
|
|
(415,000 |
)
|
|
$ |
0.75 |
|
|
Cancelled / Expired
|
|
|
- |
|
|
$ |
- |
|
|
Warrants outstanding at November 30, 2018
|
|
|
57,062,190 |
|
|
$ |
0.53 |
|
|
Transactions involving warrants are summarized as follows:
| |
|
Number of
Shares
|
|
|
Weighted
Average
Exercise
Price
|
|
|
Warrants outstanding at May 31, 2017
|
|
|
- |
|
|
$ |
- |
|
|
Granted
|
|
|
4,700,988 |
|
|
$ |
0.69 |
|
|
Exercised
|
|
|
- |
|
|
$ |
- |
|
|
Cancelled / Expired
|
|
|
- |
|
|
$ |
- |
|
|
Warrants outstanding at May 31, 2018
|
|
|
4,700,988 |
|
|
$ |
0.69 |
|
|