Basis of Presentation and New Accounting Guidance (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	May 04, 2019	May 05, 2018	Feb. 01, 2020	Feb. 03, 2019	Feb. 02, 2019	Feb. 03, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance					$ 297	$ 5,829
Operating lease right-of-use assets	$ 921,084				0
Present value of lease liabilities	981,312
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets				$ 1,000,000
Present value of lease liabilities				1,000,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance					(1,684)	$ 5,829
Retained Earnings | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance				300
Retained Earnings | Accounting Standards Update 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance					(2,000)
Accumulated Other Comprehensive Loss
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance					1,981
Accumulated Other Comprehensive Loss | Accounting Standards Update 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment from adoption of new accounting guidance				$ 2,000	2,000
Scenario, Forecast | Cost of product sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification to net loss for (gains) losses realized			$ (1,400)
Royalties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net royalties revenue recognized	$ 3,100	$ 3,300
Minimum | Royalties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
License agreement term	3 years
Maximum | Royalties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
License agreement term	10 years
Accrued expenses | Royalties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Current deferred royalties	$ 6,300				6,400
Other long-term liabilities | Royalties
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Noncurrent deferred royalties	$ 14,100				$ 15,500