Stock Option Plan and Stock Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unissued common stock reserved	604,308
Stock option award maximum term	10 years
Share based compensation arrangements by share based payment award vesting period maximum	5 years
Number of stock options granted	0	43,426	31,418
Unrecognized compensation cost related to unvested stock options granted	$ 3,000
Fair value of shares underlying the options vested	1,200,000
Remaining unrecognized compensation cost related to unvested restricted stock	$ 1,500,000
Weighted average remaining requisite service period of the unvested restricted stock awards	1 year 4 months 24 days
Outstanding restricted stock underlying fair value at grant date	$ 2,700,000
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	9 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	$ 1,400,000	$ 1,300,000	$ 1,300,000
Compensation expense related share based compensation net of tax	$ 900,000	$ 800,000	$ 800,000

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

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- Definition

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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- Definition

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
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Gross number of share options (or share units) granted during the period.

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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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- Definition

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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