Share-Based Payments (Details 1) - $ / shares
|
3 Months Ended |
|
|
May 31, 2019 |
May 31, 2018 |
Feb. 28, 2019 |
Feb. 28, 2018 |
| Exercise price |
$ 6.60
|
$ 8.17
|
$ 7.53
|
$ 7.99
|
| Number of stock options, outstanding |
1,691,973
|
2,254,581
|
1,962,400
|
2,374,581
|
| Number of stock options, exercisable |
914,998
|
926,249
|
|
|
| Weighted average remaining life, outstanding |
7 years 6 months 7 days
|
8 years 7 months 6 days
|
|
|
| Weighted average remaining life, exercisable |
7 years 6 months 14 days
|
7 years 11 months 16 days
|
|
|
| Stock Option 1 |
|
|
|
|
| Exercise price |
$ 0.80
|
|
|
|
| Number of stock options, outstanding |
582,081
|
582,081
|
|
|
| Weighted average remaining life, outstanding |
6 years 6 months 4 days
|
7 years 6 months
|
|
|
| Stock Option 2 |
|
|
|
|
| Exercise price |
$ 3.00
|
|
|
|
| Number of stock options, outstanding |
0
|
12,500
|
|
|
| Weighted average remaining life, outstanding |
0 years
|
4 days
|
|
|
| Stock Option 3 |
|
|
|
|
| Exercise price |
$ 5.25
|
|
|
|
| Number of stock options, outstanding |
380,000
|
430,000
|
|
|
| Weighted average remaining life, outstanding |
8 years 2 months 26 days
|
8 years 2 months 8 days
|
|
|
| Stock Option 4 |
|
|
|
|
| Exercise price |
$ 8.75
|
|
|
|
| Number of stock options, outstanding |
16,683
|
0
|
|
|
| Weighted average remaining life, outstanding |
14 days
|
0 years
|
|
|
| Stock Option 5 |
|
|
|
|
| Exercise price |
$ 11.52
|
|
|
|
| Number of stock options, outstanding |
13,209
|
0
|
|
|
| Weighted average remaining life, outstanding |
14 days
|
0 years
|
|
|
| Stock Option 6 |
|
|
|
|
| Exercise price |
$ 12.00
|
|
|
|
| Number of stock options, outstanding |
700,000
|
700,000
|
|
|
| Weighted average remaining life, outstanding |
8 years 3 months 14 days
|
9 years 3 months 14 days
|
|
|
| Stock Option 7 |
|
|
|
|
| Exercise price |
$ 13.49
|
|
|
|
| Number of stock options, outstanding |
0
|
250,000
|
|
|
| Weighted average remaining life, outstanding |
0 years
|
9 years 4 months 17 days
|
|
|
| Stock Option 8 |
|
|
|
|
| Exercise price |
$ 13.89
|
|
|
|
| Number of stock options, outstanding |
0
|
280,000
|
|
|
| Weighted average remaining life, outstanding |
0 years
|
9 years 5 months 8 days
|
|
|