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
Apr. 30, 2018
Jan. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 9 months 18 days  
Finite-life intangible assets, Gross $ 51,568 $ 52,125
Accumulated Amortization (50,527) (50,822)
Finite-life intangible assets, Net $ 1,041 1,303
Customer Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 8 months 12 days  
Finite-life intangible assets, Gross $ 30,489 30,818
Accumulated Amortization (29,698) (29,836)
Finite-life intangible assets, Net $ 791 982
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 3 months 18 days  
Finite-life intangible assets, Gross $ 2,594 2,639
Accumulated Amortization (2,591) (2,635)
Finite-life intangible assets, Net $ 3 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 $ 11,308 11,479
Accumulated Amortization (11,096) (11,203)
Finite-life intangible assets, Net $ 212 276
Trademarks, Patents and Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 2 years 3 months 18 days  
Finite-life intangible assets, Gross $ 7,177 7,189
Accumulated Amortization (7,142) (7,148)
Finite-life intangible assets, Net $ 35 $ 41