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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014
Income Tax [Line Items]
Remaining valuation allowance against the Company's deferred tax assets	0us-gaap_DeferredTaxAssetsValuationAllowance	$ 0us-gaap_DeferredTaxAssetsValuationAllowance
Unrecognized tax benefits	307,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	307,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Accrued payment of interest and penalties associated with unrecognized tax benefits	216,500us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	$ 186,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Minimum [Member]
Income Tax [Line Items]
Income tax examination, year under examination	2011
Maximum [Member]
Income Tax [Line Items]
Income tax examination, year under examination	2013

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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- Definition

Tax year being audited in the income tax examination, in CCYY format.

+ References

No definition available.

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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