Goodwill and Intangible Assets, Net - Schedule of Carrying Amount of Intangible Asset, Net (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2019	Jan. 31, 2019
Finite Lived Intangible Assets [Line Items]
Intangible assets gross		$ 1,900
Intangibles acquired	$ 9,500
Accumulated Amortization	(1,961)
Intangible assets net	9,439
Developed Technology
Finite Lived Intangible Assets [Line Items]
Intangible assets gross		$ 1,900
Intangibles acquired	9,300
Accumulated Amortization	(1,959)
Intangible assets net	$ 9,241
Weighted Average Remaining Useful Life	5 years
Trademarks
Finite Lived Intangible Assets [Line Items]
Intangibles acquired	$ 200
Accumulated Amortization	(2)
Intangible assets net	$ 198
Weighted Average Remaining Useful Life	5 years