Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Property Plant And Equipment [Line Items]
Total property and equipment	$ 395,622	$ 329,526
Less: accumulated depreciation and amortization	(272,882)	(204,173)
Property and equipment, net	122,740	125,353
Depreciation and amortization	80,400	68,300	$ 60,200
Test equipment
Property Plant And Equipment [Line Items]
Total property and equipment	205,555	170,930
Computer equipment and software
Property Plant And Equipment [Line Items]
Total property and equipment	141,387	117,330
Furniture and fixtures
Property Plant And Equipment [Line Items]
Total property and equipment	8,324	6,980
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property and equipment	$ 40,356	$ 34,286

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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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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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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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