Annual report pursuant to Section 13 and 15(d)

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

v3.7.0.1
Acquisitions and Loss on Impairment of TLL, LLC - Components of Identified Intangible Assets Associated with Acquisition and their Estimated Useful Lives (Detail) - USD ($)
$ in Thousands
 12 Months Ended
May 05, 2016
Feb. 02, 2015
Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life     2 years 4 months 24 days
Customer Contracts [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life     2 years 4 months 24 days
Non-Compete Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life     1 year 3 months 18 days
DCC Labs [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Fair Value $ 810    
DCC Labs [Member] | Tradename [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life 4 years    
Identified intangible assets, Fair Value $ 60    
DCC Labs [Member] | Customer Contracts [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life 2 years    
Identified intangible assets, Fair Value $ 230    
DCC Labs [Member] | Non-Compete Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life 2 years    
Identified intangible assets, Fair Value $ 30    
DCC Labs [Member] | Existing Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life 3 years    
Identified intangible assets, Fair Value $ 490    
Timeline Labs [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Fair Value   $ 6,720  
Timeline Labs [Member] | Tradename [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life   7 years  
Identified intangible assets, Fair Value   $ 620  
Timeline Labs [Member] | Customer Contracts [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life   7 years  
Identified intangible assets, Fair Value   $ 4,760  
Timeline Labs [Member] | Non-Compete Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life   2 years  
Identified intangible assets, Fair Value   $ 170  
Timeline Labs [Member] | Existing Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Identified intangible assets, Useful life   5 years  
Identified intangible assets, Fair Value   $ 1,170