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Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) (USD $) | 6 Months Ended
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Aug. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Unvested Beginning Balance, Number of Options | 169,954
New grants, Number of Options | 36,155
Vested, Number of Options | (93,898)
Forfeited, Number of Options |
Unvested Ending Balance, Number of Options | 112,211
Unvested Beginning Balance, Weighted Average Grant Date Fair Value | $ 3.20
New grants, Weighted Average Grant Date Fair Value | $ 1.96
Vested, Weighted Average Grant Date Fair Value | $ 3.08
Forfeited, Weighted Average Grant Date Fair Value |
Unvested Ending Balance, Weighted Average Grant Date Fair Value | $ 2.89

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