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Summary of Stock Option Activity (Detail)	6 Months Ended
	Aug. 02, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at February 1, 2015, shares	107,000
Granted, shares	0
Exercised, shares	(68,500)
Cancelled, shares	0
Balance at August 2, 2015 shares	38,500

X

- 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.

+ References

No definition available.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ 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 (c)(1)(iv)(3)-(4)



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

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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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