| Share-based Payment Arrangement, Option, 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
|
|
|
|
2.73
|
|
|
$
|
0.49
|
|
|
|
35,782,952
|
|
|
$
|
0.49
|
|
|
|
0.50
|
|
|
|
2,736,500
|
|
|
|
2.98
|
|
|
|
0.50
|
|
|
|
2,736,500
|
|
|
|
0.50
|
|
|
|
0.60
|
|
|
|
17,500,000
|
|
|
|
2.76
|
|
|
|
0.60
|
|
|
|
17,500,000
|
|
|
|
0.60
|
|
|
|
0.75
|
|
|
|
1,042,738
|
|
|
|
2.37
|
|
|
|
0.75
|
|
|
|
1,042,738
|
|
|
|
0.75
|
|
|
|
0.80
|
|
|
|
1,343,400
|
|
|
|
2.79
|
|
|
|
0.80
|
|
|
|
1,343,400
|
|
|
|
0.80
|
|
|
|
1.10
|
|
|
|
279,875
|
|
|
|
2.79
|
|
|
|
1.10
|
|
|
|
279,875
|
|
|
|
1.10
|
|
|
|
|
|
|
|
58,685,465
|
|
|
|
2.74
|
|
|
$
|
0.53
|
|
|
|
58,685,465
|
|
|
$
|
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
|
|
|
54,399,477 |
|
|
$ |
0.53 |
|
|
Exercised
|
|
|
(415,000 |
)
|
|
$ |
0.75 |
|
|
Cancelled / Expired
|
|
|
- |
|
|
$ |
- |
|
|
Warrants outstanding at February 28, 2019
|
|
|
58,685,465 |
|
|
$ |
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 |
|
|