Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Nov. 01, 2020 USD ($)	May 03, 2020	Apr. 30, 2019	Nov. 01, 2020 USD ($) numberOfRevenueSources	Oct. 31, 2019 USD ($)	Feb. 02, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Depreciation and amortization				$ 49,811	$ 66,785
Restricted cash	$ 11,349			$ 11,349		$ 15,287
Number of revenue sources | numberOfRevenueSources				2
Test equipment, computer equipment and software
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful life of assets		4 years
Test equipment, computer equipment and software | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful life of assets			2 years
Test equipment, computer equipment and software | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Estimated useful life of assets			3 years
Change in accounting estimate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Depreciation and amortization	$ (4,900)			$ (19,000)