Stock-based Compensation Plans (Tables)
|
3 Months Ended |
May 31, 2018 |
|---|
| Stockholders Equity |
|
| Warrants activities |
| |
|
2018 |
|
|
2017 |
|
| |
|
Number of
warrants |
|
|
Weighted average exercise price |
|
|
Number of
warrants |
|
|
Weighted average exercise price |
|
| Outstanding, beginning of period |
|
|
2,515,248 |
|
|
$ |
8.21 |
|
|
|
1,647,670 |
|
|
$ |
2.91 |
|
| Granted |
|
|
- |
|
|
|
- |
|
|
|
550,000 |
|
|
|
5.25 |
|
| Exercised |
|
|
(20,000 |
) |
|
|
0.80 |
|
|
|
(22,548 |
) |
|
|
0.80 |
|
| Forfeited |
|
|
(100,000 |
) |
|
|
5.25 |
|
|
|
- |
|
|
|
- |
|
| Expired |
|
|
- |
|
|
|
- |
|
|
|
(314,667 |
) |
|
|
6.00 |
|
| Outstanding, end of period |
|
|
2,395,248 |
|
|
$ |
8.40 |
|
|
|
1,860,455 |
|
|
$ |
3.11 |
|
| Exercisable, end of period |
|
|
1,066,916 |
|
|
$ |
7.32 |
|
|
|
836,705 |
|
|
$ |
2.82 |
|
|
| Outstanding and exercisable warrants |
| |
|
|
2018 |
|
|
2017 |
|
| Exercise price |
|
|
Number of warrants outstanding |
|
|
Weighted average remaining life |
|
|
Number of warrants outstanding |
|
|
Weighted average remaining life |
|
| $ |
0.80 |
|
|
|
582,081 |
|
|
|
7.50 |
|
|
|
912,452 |
|
|
|
0.51 |
|
| $ |
3.00 |
|
|
|
12,500 |
|
|
|
- |
|
|
|
75,000 |
|
|
|
1.02 |
|
| $ |
5.25 |
|
|
|
430,000 |
|
|
|
8.19 |
|
|
|
550,000 |
|
|
|
9.98 |
|
| $ |
6.00 |
|
|
|
- |
|
|
|
- |
|
|
|
323,003 |
|
|
|
0.08 |
|
| $ |
12.00 |
|
|
|
840,667 |
|
|
|
7.84 |
|
|
|
- |
|
|
|
- |
|
| $ |
13.49 |
|
|
|
250,000 |
|
|
|
9.38 |
|
|
|
- |
|
|
|
- |
|
| $ |
13.89 |
|
|
|
280,000 |
|
|
|
9.44 |
|
|
|
- |
|
|
|
- |
|
| Outstanding, end of period |
|
|
|
2,395,248 |
|
|
|
8.13 |
|
|
|
1,860,455 |
|
|
|
3.26 |
|
| Exercisable, end of period |
|
|
|
1,066,916 |
|
|
|
6.98 |
|
|
|
836,705 |
|
|
|
0.35 |
|
|
| Estimated fair value of warrants on grant date |
| |
|
2018 |
|
|
2017 |
|
| Exercise price |
|
$ |
- |
|
|
$ |
5.25 |
|
| Risk-free interest rate |
|
|
- |
|
|
|
2.02 |
% |
| Expected dividend yield |
|
|
- |
|
|
|
0 |
% |
| Expected volatility |
|
|
- |
|
|
|
110.72 |
% |
| Expected life |
|
|
- |
|
|
6 years |
|
| |
|
|
|
|
|
|
|
|
|
| Summarizes of restricted stock units |
| |
|
2018 |
|
|
2017 |
|
| |
|
Number of RSUs |
|
|
Number of RSUs |
|
| Outstanding, beginning of period |
|
|
34,102 |
|
|
|
- |
|
| Granted |
|
|
24,450 |
|
|
|
- |
|
| Vested |
|
|
(35,797 |
) |
|
|
- |
|
| Outstanding, end of period |
|
|
22,755 |
|
|
|
- |
|
| Weighted average remaining life (in years) |
|
|
3.02 |
|
|
|
- |
|
|