Stock-based Compensation Plans (Tables)
|
6 Months Ended |
Aug. 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 |
|
|
13,209 |
|
|
|
11.52 |
|
|
|
1,080,000 |
|
|
|
5.25 |
|
| Exercised |
|
|
(20,000 |
) |
|
|
0.80 |
|
|
|
(213,770 |
) |
|
|
5.52 |
|
| Forfeited |
|
|
(100,000 |
) |
|
|
5.25 |
|
|
|
(65,418 |
) |
|
|
2.90 |
|
| Expired |
|
|
(62,500 |
) |
|
|
4.80 |
|
|
|
(443,900 |
) |
|
|
6.00 |
|
| Outstanding,
end of period |
|
|
2,345,957 |
|
|
$ |
8.44 |
|
|
|
2,004,582 |
|
|
$ |
3.21 |
|
| Exercisable,
end of period |
|
|
1,071,915 |
|
|
$ |
7.67 |
|
|
|
616,457 |
|
|
$ |
1.19 |
|
|
| 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 |
|
|
|
7.25 |
|
|
|
912,082 |
|
|
|
6.50 |
|
| $ |
3.00 |
|
|
|
- |
|
|
|
- |
|
|
|
12,500 |
|
|
|
0.76 |
|
| $ |
5.25 |
|
|
|
380,000 |
|
|
|
8.99 |
|
|
|
1,080,000 |
|
|
|
9.93 |
|
| $ |
11.52 |
|
|
|
13,209 |
|
|
|
9.86 |
|
|
|
- |
|
|
|
- |
|
| $ |
12.00 |
|
|
|
840,667 |
|
|
|
7.59 |
|
|
|
- |
|
|
|
- |
|
| $ |
13.49 |
|
|
|
250,000 |
|
|
|
9.13 |
|
|
|
- |
|
|
|
- |
|
| $ |
13.89 |
|
|
|
280,000 |
|
|
|
9.19 |
|
|
|
- |
|
|
|
- |
|
| Outstanding,
end of period |
|
|
|
2,345,957 |
|
|
|
8.10 |
|
|
|
2,004,582 |
|
|
|
8.31 |
|
| Exercisable,
end of period |
|
|
|
1,071,915 |
|
|
|
7.22 |
|
|
|
616,457 |
|
|
|
6.66 |
|
|
| Estimated fair value of warrants on grant date |
| |
|
2018 |
|
|
2017 |
|
| Exercise
price |
|
$ |
11.52 |
|
|
$ |
5.25 |
|
| Risk-free
interest rate |
|
|
2.82 |
% |
|
|
1.60 to 2.02 |
% |
| Expected
dividend yield |
|
|
0 |
% |
|
|
0 |
% |
| Expected
volatility |
|
|
78 |
% |
|
|
82% to 84 |
% |
| Expected
life |
|
|
6.5 years |
|
|
|
4 to 6 years |
|
|
| Summarizes of restricted stock units |
| |
|
2018 |
|
|
2017 |
|
| |
|
Number
of
RSUs |
|
|
Number
of
RSUs |
|
| Outstanding,
beginning of period |
|
|
34,102 |
|
|
|
- |
|
| Granted |
|
|
102,818 |
|
|
|
- |
|
| Vested |
|
|
(35,797 |
) |
|
|
- |
|
| Forfeited |
|
|
(1,625 |
) |
|
|
- |
|
| Outstanding,
end of period |
|
|
99,498 |
|
|
|
- |
|
| Weighted
average remaining life (in years) |
|
|
2.21 |
|
|
|
- |
|
|