Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Summary of Allocation of Purchase Price (Detail)

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Acquisitions - Summary of Allocation of Purchase Price (Detail) - USD ($)
$ in Thousands
May 05, 2016
Apr. 30, 2017
Jan. 31, 2017
Aug. 01, 2016
Estimated Fair value of assets acquired and liabilities assumed:        
Goodwill   $ 23,623 $ 23,287  
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