Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Property Plant And Equipment [Line Items]
Total property and equipment	$ 530,578	$ 475,515
Less: accumulated depreciation and amortization	(337,437)	(312,474)
Property and equipment, net	193,141	163,041
Test equipment
Property Plant And Equipment [Line Items]
Total property and equipment	265,005	238,069
Computer equipment and software
Property Plant And Equipment [Line Items]
Total property and equipment	210,503	184,518
Furniture and fixtures
Property Plant And Equipment [Line Items]
Total property and equipment	8,534	8,484
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property and equipment	$ 46,536	$ 44,444

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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