Annual report pursuant to Section 13 and 15(d)

Acquisitions and Loss on Impairment of TLL, LLC - Summary of Allocation of Purchase Price (Detail)

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Acquisitions and Loss on Impairment of TLL, LLC - Summary of Allocation of Purchase Price (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 05, 2016
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2018
Aug. 01, 2016
Estimated Fair value of consideration:          
Cash, net of cash acquired   $ 5,243 $ 11,686    
Estimated Fair value of assets acquired and liabilities assumed:          
Goodwill   $ 23,287 $ 40,175 $ 25,579  
DCC Labs [Member]          
Estimated Fair value of consideration:          
Cash, net of cash acquired $ 5,243        
Stock consideration 2,640        
Total purchase price 7,883        
Estimated Fair value of assets acquired and liabilities assumed:          
Current assets 826        
Other long-term assets 116        
Finite-life intangible assets 810        
Goodwill 7,255       $ 45,800
Current liabilities (618)        
Other long-term liabilities (506)        
Allocated purchase price $ 7,883