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, 2018
Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 8 months 12 days  
Finite-lived intangible assets, Gross $ 52,125 $ 50,051
Accumulated Amortization (50,822) (47,448)
Finite-lived intangible assets, Net $ 1,303 2,603
Customer Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 8 months 12 days  
Finite-lived intangible assets, Gross $ 30,818 30,056
Accumulated Amortization (29,836) (28,019)
Finite-lived intangible assets, Net $ 982 2,037
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 6 months  
Finite-lived intangible assets, Gross $ 2,639 2,374
Accumulated Amortization (2,635) (2,356)
Finite-lived intangible assets, Net $ 4 18
Completed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 9 months 18 days  
Finite-lived intangible assets, Gross $ 11,479 10,496
Accumulated Amortization (11,203) (9,997)
Finite-lived intangible assets, Net $ 276 499
Trademarks, Patents and Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 2 years 6 months  
Finite-lived intangible assets, Gross $ 7,189 7,125
Accumulated Amortization (7,148) (7,076)
Finite-lived intangible assets, Net $ 41 $ 49