Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Effective Income Tax Rate (Detail)	12 Months Ended
Jan. 31, 2015	Feb. 01, 2014
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	34.00%	34.00%
State income tax provision	4.80%	(23.00%)
Change in valuation allowance	(49.00%)	(166.40%)
Nondeductible meals and entertainment expense	5.80%	(1.20%)
Other-permanent items	5.70%	(2.60%)
Other-rate differential	10.90%	4.70%
Uncertain tax benefit adjustment	(11.50%)	13.80%
Federal tax credits	(9.80%)	6.40%
Effective income tax rate	(9.10%)	(134.30%)

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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