Summary of Significant Accounting Policies - Fair value of financial instruments (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Jan. 28, 2023	Jul. 30, 2022
Significant Accounting Policies [Line Items]
Amortized Cost	$ 101,813	$ 66,845	$ 117,315
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	18	292	1,107
Fair Market Value	101,795	66,553	116,208
Fair Value, Inputs, Level 1
Significant Accounting Policies [Line Items]
Cash equivalents	297,600	313,200	115,000
Corporate bonds \| Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Amortized Cost	101,813	66,845	110,692
Gross Unrealized Gains	0	0	0
Gross Unrealized Losses	18	292	1,104
Fair Market Value	$ 101,795	$ 66,553	109,588
Municipal bonds \| Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Amortized Cost			6,623
Gross Unrealized Gains			0
Gross Unrealized Losses			3
Fair Market Value			$ 6,620

Cash Equivalents

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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