Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail)

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Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 02, 2015
Apr. 30, 2016
Jan. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Finite-life intangible assets, Gross   $ 50,488 $ 49,464
Accumulated Amortization   (46,741) (45,338)
Finite-life intangible assets, Net   $ 3,747 4,126
Customer Contracts [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining life (Years) 7 years 6 years  
Finite-life intangible assets, Gross   $ 30,555 29,956
Accumulated Amortization   (27,192) (26,284)
Finite-life intangible assets, Net   3,363 3,672
Non-Compete Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining life (Years) 2 years    
Finite-life intangible assets, Gross   2,457 2,365
Accumulated Amortization   $ (2,457) (2,365)
Completed Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining life (Years)   5 years 6 months  
Finite-life intangible assets, Gross   $ 10,389 10,075
Accumulated Amortization   (10,005) (9,621)
Finite-life intangible assets, Net   384 454
Trademarks, Patents and Other [Member]      
Finite-Lived Intangible Assets [Line Items]      
Finite-life intangible assets, Gross   7,087 7,068
Accumulated Amortization   $ (7,087) $ (7,068)