Stock Option Plan and Stock Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unissued common stock reserved	460,789		460,789
Stock option award maximum term			10 years
Share based compensation arrangements by share based payment award vesting period maximum			5 years
Number of outstanding vested and unvested stock options	0		0
Number of stock options granted			0	0
Number of unvested stock options outstanding	0		0
Remaining unrecognized compensation cost related to unvested restricted stock	$ 2.0		$ 2.0
Weighted average remaining requisite service period of the unvested restricted stock awards			1 year 10 months 24 days
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related share based compensation before tax	$ 0.4	$ 0.3	$ 0.7	$ 0.7

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

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- Definition

Stock option award maximum period.

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

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.

+ References

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- Definition

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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- Definition

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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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

+ References

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- Definition

Number of non-vested options outstanding.

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