Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 75,225	$ 27,825
Accumulated Amortization	(16,968)	(7,707)
Net Carrying Amount	58,257	20,118
Intangible assets amortization expense	9,300	2,600	$ 1,500
Technology patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	19,125	10,125
Accumulated Amortization	(8,933)	(6,572)
Net Carrying Amount	10,192	3,553
Portfolio of intangible assets acquired	$ 9,000
Weighted average remaining useful life	3 years 8 months 12 days
Finite-lived intangibles acquired, amortization period	7 years
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 56,100	17,700
Accumulated Amortization	(8,035)	(1,135)
Net Carrying Amount	$ 48,065	$ 16,565
Weighted average remaining useful life	6 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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