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Business Combinations - Allocation of Purchase Price (Details) - USD ($)
$ in Thousands
Jan. 31, 2017
Dec. 30, 2016
Jan. 31, 2016
Jan. 31, 2015
Business Acquisition [Line Items]        
Goodwill $ 6,306   $ 1,605 $ 174
Spend360        
Business Acquisition [Line Items]        
Intangible assets   $ 5,431    
Deferred revenue   (26)    
Goodwill   4,701    
Total purchase price allocation   $ 10,106