Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2019	Jan. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,986	$ 2,027
Less: Accumulated amortization	(1,349)	(979)
Intangible assets, net	637	1,048
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,248	1,269
Weighted-Average Remaining Useful Life	12 months
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 615	632
Weighted-Average Remaining Useful Life	36 months
Non-compete agreement
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 123	$ 126
Weighted-Average Remaining Useful Life	12 months