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Summary of Significant Accounting Policies (Amortized Cost, Fair Value, and Corresponding Amount of Gross Unrealized Gains and Losses Recognized in AOCI of Available-for-Sale Security) (Details) - USD ($) $ in Thousands	Jan. 30, 2022	Jan. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	$ 6,554	$ 6,111
Fair Value, Inputs, Level 3 [Member] | Corporate Trust [Member]
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	5,900	6,047
Gross Unrealized Gains	654	64
Gross Unrealized Losses
Estimated Fair Value	$ 6,554	$ 6,111

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- Definition

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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