Description of the Business and Basis of Presentation - Narrative (Details) $ in Thousands	3 Months Ended
	May 03, 2019 USD ($) segment	Feb. 02, 2019 USD ($)
Class of Stock [Line Items]
Number of reportable segments | segment	1
Operating lease right-of-use assets, net	$ 27,192
Operating lease liabilities, non-current	$ 28,101
IPO | Denali
Class of Stock [Line Items]
Percent of outstanding shares owned	85.90%
Percent of voting interests owned	98.40%
Accounting Standards Update 2016-02
Class of Stock [Line Items]
Operating lease right-of-use assets, net		$ 28,000
Operating lease liabilities, non-current		$ 31,800