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
 9 Months Ended
Oct. 31, 2016
Jan. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 4 years 8 months 12 days  
Finite-life intangible assets, Gross $ 52,713 $ 49,464
Accumulated Amortization (47,328) (45,338)
Finite-life intangible assets, Net $ 5,385 4,126
Customer Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 4 years 3 months 18 days  
Finite-life intangible assets, Gross $ 31,454 29,956
Accumulated Amortization (27,797) (26,284)
Finite-life intangible assets, Net $ 3,657 3,672
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 1 year 9 months 18 days  
Finite-life intangible assets, Gross $ 2,483 2,365
Accumulated Amortization (2,410) (2,365)
Finite-life intangible assets, Net $ 73  
Completed Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 6 years  
Finite-life intangible assets, Gross $ 11,509 10,075
Accumulated Amortization (10,029) (9,621)
Finite-life intangible assets, Net $ 1,480 454
Trademarks, Patents and Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining life (Years) 4 years 9 months 18 days  
Finite-life intangible assets, Gross $ 7,267 7,068
Accumulated Amortization (7,092) $ (7,068)
Finite-life intangible assets, Net $ 175