Stockholders' Equity (Tables)
|
9 Months Ended |
Nov. 30, 2017 |
|---|
| Stockholders Equity Tables |
|
| Estimated fair value of warrants on grant date |
| Risk-free
interest rate |
2.10% |
| Expected dividend
yield |
0% |
| Expected volatility |
80% |
|
Expected
life |
6 years |
| Risk-free
interest rate |
1.46
to 1.74% |
| Expected dividend
yield |
0% |
| Expected volatility |
82 to 94% |
| Expected life |
3 to 5 years |
| Risk-free
interest rate |
1.50
to 2.15% |
| Expected dividend
yield |
0% |
| Expected volatility |
80 to 94% |
| Expected life |
3 to 6 years |
|
| Warrants activities |
| |
|
Number
of
Warrant
Shares |
|
|
Exercise
Price Range Per
Share |
|
Weighted
Average
Exercise
Price |
|
| Balance,
February 28, 2017 |
|
|
1,647,670 |
|
|
$0.80 to
$6.00 |
|
$ |
2.91 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Granted |
|
|
2,310,000 |
|
|
$5.25 to $13.89 |
|
$ |
9.23 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Forfeited |
|
|
(515,418 |
) |
|
$0.80 to $5.25 |
|
$ |
4.95 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Exercised |
|
|
(213,770 |
) |
|
$0.80 to $6.00 |
|
$ |
5.52 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Expired |
|
|
(543,900 |
) |
|
$5.25
to $6.00 |
|
$ |
5.86 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Balance,
November 30, 2017 |
|
|
2,684,582 |
|
|
$0.80 to $13.89 |
|
$ |
7.16 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Earned
and exercisable, November 30, 2017 |
|
|
966,250 |
|
|
$0.80
to $13.49 |
|
$ |
4.90 |
|
| |
|
|
|
|
|
|
|
|
|
|
| Unvested,
November 30, 2017 |
|
|
1,718,332 |
|
|
$0.80
to $13.89 |
|
$ |
8.42 |
|
|
| Outstanding and exercisable warrants |
| |
|
|
Warrants
Outstanding |
|
|
Warrants
Exercisable |
|
| Range
of Exercise Prices |
|
|
Number
Outstanding |
|
|
Average
Remaining Contractual Life (in years) |
|
|
Weighted
Average Exercise Price |
|
|
Number
Exercisable |
|
|
Average
Remaining Contractual Life (in years) |
|
|
Weighted
Average Exercise Price |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| $ |
0.80 |
|
|
|
912,082 |
|
|
|
6.21 |
|
|
$ |
0.80 |
|
|
|
594,582 |
|
|
|
6.32 |
|
|
$ |
0.80 |
|
| $ |
3.00 |
|
|
|
12,500 |
|
|
|
0.50 |
|
|
$ |
3.00 |
|
|
|
12,500 |
|
|
|
0.50 |
|
|
$ |
3.00 |
|
| $ |
5.25 |
|
|
|
530,000 |
|
|
|
9.74 |
|
|
$ |
5.25 |
|
|
|
36,250 |
|
|
|
9.74 |
|
|
$ |
5.25 |
|
| $ |
12.00 |
|
|
|
700,000 |
|
|
|
9.79 |
|
|
$ |
12.00 |
|
|
|
216,668 |
|
|
|
9.79 |
|
|
$ |
12.00 |
|
| $ |
13.49 |
|
|
|
250,000 |
|
|
|
9.88 |
|
|
$ |
13.49 |
|
|
|
106,250 |
|
|
|
9.88 |
|
|
$ |
13.49 |
|
| $ |
13.89 |
|
|
|
280,000 |
|
|
|
9.94 |
|
|
$ |
13.89 |
|
|
|
- |
|
|
|
- |
|
|
$ |
- |
|
| Total |
|
|
|
2,684,582 |
|
|
|
|
|
|
|
|
|
|
|
966,250 |
|
|
|
|
|
|
|
|
|
|