Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) - $ / shares |
3 Months Ended | |
|---|---|---|
May 31, 2016 |
May 31, 2015 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Unvested Beginning Balance, Number of Options | 76,425 | |
| New grants, Number of Options | 0 | |
| Vested, Number of Options | (71,352) | |
| Forfeited, Number of Options | 0 | |
| Unvested Ending Balance, Number of Options | 5,073 | |
| Unvested Beginning Balance, Weighted Average Grant Date Fair Value | $ 2.32 | |
| New grants, Weighted Average Grant Date Fair Value | 0 | $ 2.24 |
| Vested, Weighted Average Grant Date Fair Value | 2.32 | |
| Forfeited, Weighted Average Grant Date Fair Value | 0 | |
| Unvested Ending Balance, Weighted Average Grant Date Fair Value | $ 2.41 | |