Stock-based Compensation Plans (Details 1) - shares
|
6 Months Ended |
|
|
Aug. 31, 2018 |
Aug. 31, 2017 |
Feb. 28, 2018 |
Feb. 28, 2017 |
| Number of warrants outstanding |
2,345,957
|
2,004,582
|
2,515,248
|
1,647,670
|
| Warrants exercisable |
1,071,915
|
616,457
|
|
|
| Warrants outstanding, weighted average remaining life |
8 years 1 month 6 days
|
8 years 3 months 22 days
|
|
|
| Warrant exercisable, weighted average remaining life |
7 years 2 months 19 days
|
6 years 7 months 28 days
|
|
|
| Exercise Prices 0.80 [Member] |
|
|
|
|
| Number of warrants outstanding |
582,081
|
912,082
|
|
|
| Warrants outstanding, weighted average remaining life |
7 years 2 months 30 days
|
6 years 6 months
|
|
|
| Exercise Prices 3.00 [Member] |
|
|
|
|
| Number of warrants outstanding |
|
12,500
|
|
|
| Warrants outstanding, weighted average remaining life |
0 years
|
9 months 3 days
|
|
|
| Exercise Prices 5.25 [Member] |
|
|
|
|
| Number of warrants outstanding |
380,000
|
1,080,000
|
|
|
| Warrants outstanding, weighted average remaining life |
8 years 11 months 26 days
|
9 years 11 months 4 days
|
|
|
| Exercise Prices 11.52 [Member] |
|
|
|
|
| Number of warrants outstanding |
13,209
|
|
|
|
| Warrants outstanding, weighted average remaining life |
9 years 10 months 10 days
|
0 years
|
|
|
| Exercise Prices 12.00 [Member] |
|
|
|
|
| Number of warrants outstanding |
840,667
|
|
|
|
| Warrants outstanding, weighted average remaining life |
7 years 7 months 2 days
|
0 years
|
|
|
| Exercise Prices 13.49 [Member] |
|
|
|
|
| Number of warrants outstanding |
250,000
|
|
|
|
| Warrants outstanding, weighted average remaining life |
9 years 1 month 16 days
|
0 years
|
|
|
| Exercise Prices 13.89 [Member] |
|
|
|
|
| Number of warrants outstanding |
280,000
|
|
|
|
| Warrants outstanding, weighted average remaining life |
9 years 2 months 8 days
|
0 years
|
|
|