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TLL, LLC Acquisition and Loss on Impairment - Components of Identified Intangible Assets Associated with Timeline Labs Acquisition and their Estimated Useful Lives (Detail)

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TLL, LLC Acquisition and Loss on Impairment - Components of Identified Intangible Assets Associated with Timeline Labs Acquisition and their Estimated Useful Lives (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Feb. 02, 2015
Apr. 30, 2016
Finite-Lived Intangible Assets [Line Items]    
Identified intangible assets, Fair Value $ 6,720  
Tradename [Member]    
Finite-Lived Intangible Assets [Line Items]    
Identified intangible assets, Useful life 7 years  
Identified intangible assets, Fair Value $ 620  
Customer Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Identified intangible assets, Useful life 7 years 6 years
Identified intangible assets, Fair Value $ 4,760  
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Identified intangible assets, Useful life 2 years  
Identified intangible assets, Fair Value $ 170  
Existing Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Identified intangible assets, Useful life 5 years  
Identified intangible assets, Fair Value $ 1,170