Stock Option Plan and Stock Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
May. 31, 2015	May. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unissued common stock reserved	638,693
Stock option award maximum term	10 years
Share based compensation arrangements by share based payment award vesting period maximum	5 years
Unrecognized compensation cost related to unvested stock options granted	$ 0.1
Fair value of shares underlying the options vested	0.8
Remaining unrecognized compensation cost related to unvested restricted stock	$ 2.6
Weighted average remaining requisite service period of the unvested restricted stock awards	2 years 4 months 24 days
Outstanding restricted stock underlying fair value at grant date	$ 2.7
Unvested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining requisite service period of the unvested stock options	2 years 3 months 18 days
Selling, General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related share based compensation before tax	$ 0.3	$ 0.4
Compensation expense related share based compensation net of tax	$ 0.2	$ 0.2

Aggregate Grant Date Fair Value Of Outstanding Options And Restricted Stock Units

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Share based compensation arrangements by share based payment award vesting period maximum.

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Stock option award maximum period.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Unrecognized cost of unvested share-based compensation awards.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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