Cash, Cash Equivalents and Marketable Securities - Summary of Estimated Fair Value of Cash, Cash Equivalents and Marketable Securities (Detail) - USD ($) $ in Thousands	Jan. 29, 2022	Jan. 30, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Cash and cash equivalents	$ 117,223	$ 73,622
Estimated Fair Value, Cash and cash equivalents	117,223	73,622
Amortized Cost, Marketable securities	178,551	298,777
Gross Unrealized Holding Gains, Marketable securities	531	3,205
Gross Unrealized Holding Losses, Marketable securities	(1,822)	(62)
Estimated Fair Value, Marketable securities	177,260	301,920
Cash [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Cash and cash equivalents	99,333	43,407
Estimated Fair Value, Cash and cash equivalents	99,333	43,407
Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Cash and cash equivalents	17,890	19,267
Estimated Fair Value, Cash and cash equivalents	17,890	19,267
U.S. Treasury and Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Marketable securities	29,218	53,856
Gross Unrealized Holding Gains, Marketable securities	33	478
Gross Unrealized Holding Losses, Marketable securities	(819)	(24)
Estimated Fair Value, Marketable securities	28,432	54,310
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Cash and cash equivalents		10,948
Estimated Fair Value, Cash and cash equivalents		10,948
Amortized Cost, Marketable securities	123,611	220,558
Gross Unrealized Holding Gains, Marketable securities	436	2,352
Gross Unrealized Holding Losses, Marketable securities	(851)	(38)
Estimated Fair Value, Marketable securities	123,196	222,872
State and Local Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Marketable securities	25,722	24,363
Gross Unrealized Holding Gains, Marketable securities	62	375
Gross Unrealized Holding Losses, Marketable securities	(152)
Estimated Fair Value, Marketable securities	$ 25,632	$ 24,738

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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