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Goodwill and Intangible Assets - Schedule of Components of Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Finite Lived Intangible Assets [Line Items]    
Gross Value $ 15,474 $ 12,325
Accumulated Amortization (11,579) (5,982)
Net Carrying Value $ 3,895 $ 6,343
Developed Technology    
Finite Lived Intangible Assets [Line Items]    
Weighted Average Useful Life [1] 2 years 6 months 2 years 8 months 12 days
Gross Value $ 14,273 $ 11,124
Accumulated Amortization (10,711) (5,268)
Net Carrying Value $ 3,562 $ 5,856
Trade name and other    
Finite Lived Intangible Assets [Line Items]    
Weighted Average Useful Life [1] 6 years 10 months 24 days 6 years 10 months 24 days
Gross Value $ 1,201 $ 1,201
Accumulated Amortization (868) (714)
Net Carrying Value $ 333 $ 487
[1] From the date of acquisition