Intangible Assets - Fair Value of Acquired Identifiable Intangible Assets and Related Estimated Useful Lives (Detail) (USD $) In Thousands, unless otherwise specified	May 02, 2015	Jan. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,400	$ 3,400
Accumulated Amortization	(791)	(702)
Net Carrying Amount	2,609us-gaap_FiniteLivedIntangibleAssetsNet	2,698us-gaap_FiniteLivedIntangibleAssetsNet
Customer Contract Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,100	3,100
Accumulated Amortization	(491)	(402)
Net Carrying Amount	2,609	2,698
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	300	300
Accumulated Amortization	$ (300)	$ (300)

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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