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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

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