Goodwill and Intangible Assets - Schedule of Indefinite-lived Intangible Assets (Details) - In-process research and development - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2018	Jan. 27, 2019
Indefinite-lived Intangible Assets [Roll Forward]
Beginning balance, indefinite-lived intangible assets	$ 0
In-process research and development through acquisitions	2,300
Ending balance, indefinite-lived intangible assets	2,300
Ending balance, indefinite-lived intangible assets	$ 0	$ 2,300