Shareholders' Equity - Stock Option (Incentive and Nonqualified) Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
Aug. 03, 2013	Jul. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at Feb 2, 2013, Shares	2,388,048
Granted, shares	0
Exercised, shares	(4,625)	0
Forfeited or expired shares	(128,436)
Outstanding at August 3, 2013, Shares	2,254,987
Shares, vested and expected to vest at August 3, 2013	2,241,253
Shares, exercisable at August 3, 2013	1,846,091
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Outstanding at February 2, 2013 (in dollars per share)	$ 5.66
Granted, Weighted-Average Exercise Price (in dollars per share)	$ 0.00
Exercised, Weighted-Average Exercise Price (in dollars per share)	$ 1.63
Forfeited or expired, Weighted-Average Exercise Price (in dollars per share)	$ 15.00
Weighted-Average Exercise Price Outstanding at August 3, 2013 (in dollars per share)	$ 5.13
Vested and expected to vest at August 3, 2013, Weighted-Average Exercise Price (in dollars per share)	$ 5.14
Exercisable at August 3, 2013, Weighted-Average Exercise Price (in dollars per share)	$ 5.43
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding at August 3,2013, Weighted-Average Remaining Contractual Term	3 years 2 months 5 days
Vested and expected to vest at August 3, 2013, Weighted-Average Remaining Contractual Term	3 years 2 months 4 days
Exercisable at August 3, 2013, Weighted-Average Remaining Contractual Term	3 years 1 month
Outstanding at August 3, 2013, Aggregate Intrinsic Value	$ 1,478
Vested and expected to vest at August 3, 2013, Aggregate Intrinsic Value	1,458
Exercisable at August 3, 2013, Aggregate Intrinsic Value	$ 1,161

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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Weighted average price of options that were either forfeited or expired.

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

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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

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