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Summary of Significant Accounting Policies - Fair value of financial instruments (Details) - USD ($) $ in Thousands	Oct. 28, 2023	Jan. 28, 2023	Oct. 29, 2022
Significant Accounting Policies [Line Items]
Amortized Cost		$ 66,845	$ 72,722
Gross Unrealized Gains		0	0
Gross Unrealized Losses		292	813
Fair Market Value		66,553	71,909
Fair Value, Inputs, Level 1
Significant Accounting Policies [Line Items]
Cash equivalents	$ 115,100	313,200	21,700
Corporate bonds | Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Amortized Cost		66,845	72,522
Gross Unrealized Gains		0	0
Gross Unrealized Losses		292	813
Fair Market Value		$ 66,553	71,709
Municipal bonds | Fair Value, Inputs, Level 2
Significant Accounting Policies [Line Items]
Amortized Cost			200
Gross Unrealized Gains			0
Gross Unrealized Losses			0
Fair Market Value			$ 200

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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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