Quarterly report pursuant to Section 13 or 15(d)

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

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TLL, LLC Acquisition and Loss on Impairment - Summary of Allocation of Purchase Price (Detail) - USD ($)
$ in Thousands
3 Months Ended
Feb. 02, 2015
Apr. 30, 2015
Apr. 30, 2016
Feb. 02, 2016
Jan. 31, 2016
Aug. 03, 2015
Fair value of consideration:            
Cash, net of cash acquired   $ 11,686        
Fair value of assets acquired and liabilities assumed:            
Goodwill     $ 41,304   $ 40,175  
Timeline Labs [Member]            
Fair value of consideration:            
Cash, net of cash acquired $ 14,186          
Closing stock consideration 3,019          
Deferred stock consideration 4,959     $ 3,200   $ 1,800
Contingent consideration 475          
Total purchase price 22,639          
Fair value of assets acquired and liabilities assumed:            
Current assets 95          
Other long-term assets 108          
Finite-life intangible assets 6,720          
Goodwill 15,787          
Current liabilities (71)          
Allocated purchase price $ 22,639