Annual report pursuant to Section 13 and 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
 12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 2 years 4 months 24 days  
Finite-life intangible assets, Gross $ 50,051 $ 49,464
Accumulated Amortization (47,448) (45,338)
Finite-life intangible assets, Net $ 2,603 4,126
Customer Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 2 years 4 months 24 days  
Finite-life intangible assets, Gross $ 30,056 29,956
Accumulated Amortization (28,019) (26,284)
Finite-life intangible assets, Net $ 2,037 3,672
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 3 months 18 days  
Finite-life intangible assets, Gross $ 2,374 2,365
Accumulated Amortization (2,356) (2,365)
Finite-life intangible assets, Net $ 18  
Completed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 2 years 4 months 24 days  
Finite-life intangible assets, Gross $ 10,496 10,075
Accumulated Amortization (9,997) (9,621)
Finite-life intangible assets, Net $ 499 454
Trademarks, Patents and Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 3 years 3 months 18 days  
Finite-life intangible assets, Gross $ 7,125 7,068
Accumulated Amortization (7,076) $ (7,068)
Finite-life intangible assets, Net $ 49