Cash, Cash Equivalents and Marketable Securities - Summary of Gross Unrealized Holding Losses and Fair Value for Investments in an Unrealized Loss Position (Detail) - USD ($) $ in Thousands	Feb. 01, 2020	Feb. 02, 2019
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, Fair Value, Less Than 12 Months	$ 567	$ 41,509
Marketable securities, Fair Value, 12 Months or Greater		9,548
Marketable securities, Fair Value, Total	567	51,057
Marketable securities, Unrealized Losses, Less Than 12 Months	(2)	(28)
Marketable securities, Unrealized Losses, 12 Months or Greater		(23)
Marketable securities, Unrealized Losses, Total	(2)	(51)
U.S. Treasury and Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, Fair Value, Less Than 12 Months	567
Marketable securities, Fair Value, Total	567
Marketable securities, Unrealized Losses, Less Than 12 Months	(2)
Marketable securities, Unrealized Losses, Total	$ (2)
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, Fair Value, Less Than 12 Months		14,523
Marketable securities, Fair Value, Total		14,523
Marketable securities, Unrealized Losses, Less Than 12 Months		(8)
Marketable securities, Unrealized Losses, Total		(8)
State and Local Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Marketable securities, Fair Value, Less Than 12 Months		26,986
Marketable securities, Fair Value, 12 Months or Greater		9,548
Marketable securities, Fair Value, Total		36,534
Marketable securities, Unrealized Losses, Less Than 12 Months		(20)
Marketable securities, Unrealized Losses, 12 Months or Greater		(23)
Marketable securities, Unrealized Losses, Total		$ (43)