Short-Term Investment Reconciliation - (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 29, 2022	Jan. 30, 2021
Schedule Of Available For Sale Securities [Line Items]
Cost Basis	$ 146,906	$ 125,746
Estimated Fair Value	145,998	126,822
Gross Unrealized Gains	0	1,076
Gross Unrealized Losses	908	0
Debt Securiteis Issued by Various States of the United States and Political Subdivisions of the States
Schedule Of Available For Sale Securities [Line Items]
Cost Basis	50,554	40,701
Estimated Fair Value	50,166	41,123
Gross Unrealized Gains	0	422
Gross Unrealized Losses	388	0
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Cost Basis	96,352	85,045
Estimated Fair Value	95,832	85,699
Gross Unrealized Gains	0	654
Gross Unrealized Losses	$ 520	$ 0

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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