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Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) - $ / shares | 6 Months Ended
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Aug. 31, 2017 | Aug. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Unvested Beginning Balance, Number of Options | 5,073 |
New grants, Number of Options | 0 | 0
Vested, Number of Options | (3,457) |
Forfeited, Number of Options | 0 |
Unvested Ending Balance, Number of Options | 1,616 |
Unvested Beginning Balance, Weighted Average Grant Date Fair Value | $ 2.41 |
New grants, Weighted Average Grant Date Fair Value | 0 |
Vested, Weighted Average Grant Date Fair Value | 2.48 |
Forfeited, Weighted Average Grant Date Fair Value | 0 |
Unvested Ending Balance, Weighted Average Grant Date Fair Value | $ 2.24 |

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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