Stock-based Compensation Plans (Details 2) - shares
|
9 Months Ended |
Nov. 30, 2018 |
Nov. 30, 2017 |
| Number of warrants outstanding |
2,345,957
|
2,684,582
|
| Warrants exercisable |
1,206,081
|
966,250
|
| Warrants outstanding, weighted average remaining life |
6 years 9 months 14 days
|
7 years 6 months 3 days
|
| Warrant exercisable, weighted average remaining life |
6 years 8 months 26 days
|
7 years 6 months 14 days
|
| Exercise Prices 0.80 [Member] |
|
|
| Number of warrants outstanding |
582,081
|
912,082
|
| Warrants outstanding, weighted average remaining life |
7 years
|
6 years 2 months 16 days
|
| Exercise Prices 3.00 [Member] |
|
|
| Number of warrants outstanding |
|
12,500
|
| Warrants outstanding, weighted average remaining life |
0 years
|
6 months
|
| Exercise Prices 5.25 [Member] |
|
|
| Number of warrants outstanding |
380,000
|
530,000
|
| Warrants outstanding, weighted average remaining life |
8 years 8 months 26 days
|
9 years 8 months 26 days
|
| Exercise Prices 11.52 [Member] |
|
|
| Number of warrants outstanding |
13,209
|
|
| Warrants outstanding, weighted average remaining life |
9 years 7 months 10 days
|
0 years
|
| Exercise Prices 12.00 [Member] |
|
|
| Number of warrants outstanding |
840,667
|
700,000
|
| Warrants outstanding, weighted average remaining life |
7 years 4 months 2 days
|
9 years 9 months 14 days
|
| Exercise Prices 13.49 [Member] |
|
|
| Number of warrants outstanding |
250,000
|
250,000
|
| Warrants outstanding, weighted average remaining life |
8 years 10 months 17 days
|
9 years 10 months 17 days
|
| Exercise Prices 13.89 [Member] |
|
|
| Number of warrants outstanding |
280,000
|
280,000
|
| Warrants outstanding, weighted average remaining life |
26 days
|
9 years 11 months 8 days
|