Balance Sheet Components - Schedule of Property and Equipment Net (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 127,983	$ 84,394
Less: accumulated depreciation and amortization	(36,692)	(27,256)
Property, Plant and Equipment, Net, Total	91,291	57,138
Computer and Office Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	82,783	51,375
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	21,452	10,855
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,812	18,215
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,936	$ 3,949

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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