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
6 Months Ended
Jul. 31, 2018
Jan. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 2 years  
Finite-life intangible assets, Gross $ 37,682 $ 52,125
Accumulated Amortization (36,858) (50,822)
Finite-life intangible assets, Net $ 824 1,303
Customer Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 9 months 18 days  
Finite-life intangible assets, Gross $ 18,263 30,818
Accumulated Amortization (17,679) (29,836)
Finite-life intangible assets, Net 584 982
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-life intangible assets, Gross 2,530 2,639
Accumulated Amortization $ (2,530) (2,635)
Finite-life intangible assets, Net   4
Completed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 9 months 18 days  
Finite-life intangible assets, Gross $ 9,867 11,479
Accumulated Amortization (9,717) (11,203)
Finite-life intangible assets, Net $ 150 276
Trademarks, Patents and Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 6 years 7 months 6 days  
Finite-life intangible assets, Gross $ 7,022 7,189
Accumulated Amortization (6,932) (7,148)
Finite-life intangible assets, Net $ 90 $ 41