Goodwill and Intangible Assets - Schedule of Components of Intangible Assets (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Oct. 31, 2015	Jan. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Value		$ 15,474	$ 12,325
Accumulated Amortization		(10,109)	(5,982)
Net Carrying Value		$ 5,365	$ 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		(9,279)	(5,268)
Net Carrying Value		$ 4,994	$ 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		(830)	(714)
Net Carrying Value		$ 371	$ 487

[1] From the date of acquisition