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Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) - $ / shares | 12 Months Ended
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Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |  |
Unvested Beginning Balance, Number of Options | 1,616 |  |
New grants, Number of Options | 0 | 0 | 0
Vested, Number of Options | (1,616) |  |
Unvested Ending Balance, Number of Options |  | 1,616 |
Unvested Beginning Balance, Weighted Average Grant Date Fair Value | $ 2.24 |  |
Vested, Weighted Average Grant Date Fair Value | $ 2.24 |  |
Unvested Ending Balance, Weighted Average Grant Date Fair Value |  | $ 2.24 |

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