Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Intangible Assets (Detail)

v3.8.0.1
Summary of Significant Accounting Policies - Schedule of Intangible Assets (Detail)
12 Months Ended
Jan. 31, 2018
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 1 year 8 months 12 days
Customer Contracts [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 1 year 8 months 12 days
Non-Compete Agreements [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 6 months
Completed Technology [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 1 year 9 months 18 days
Minimum [Member] | Customer Contracts [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 1 year
Minimum [Member] | Non-Compete Agreements [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 2 years
Minimum [Member] | Completed Technology [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 4 years
Minimum [Member] | Trademarks, Patents and Other [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 5 years
Maximum [Member] | Customer Contracts [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 8 years
Maximum [Member] | Non-Compete Agreements [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 3 years
Maximum [Member] | Completed Technology [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 6 years
Maximum [Member] | Trademarks, Patents and Other [Member]  
Finite Lived And Indefinite Lived Intangible Assets [Line Items]  
Identified intangible assets, Useful life 7 years