Goodwill and Other Intangible Assets - Summary of Other Intangible Asset Balances (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,284	$ 1,853
Accumulated Amortization	(1,436)	(484)
Net Carrying Amount	5,848	1,369
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,210	1,779
Accumulated Amortization	(1,393)	(478)
Net Carrying Amount	5,817	1,301
Customer relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	74	74
Accumulated Amortization	(43)	(6)
Net Carrying Amount	$ 31	$ 68