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Fair Value (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	Apr. 30, 2023	Jan. 29, 2023
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	$ 5,416	$ 5,539
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost		25,031
Estimated Fair Value		25,031
Fair Value, Inputs, Level 3 [Member] | Corporate Trust [Member]
Debt Securities, Available-for-sale [Line Items]
Cost or Amortized Cost	5,693	5,737
Gross Unrealized Losses	(277)	(198)
Estimated Fair Value	$ 5,416	$ 5,539

X

- Definition

Amount, before tax, of unrealized loss 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).

+ References

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-Publisher FASB
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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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-Publisher FASB
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-SubTopic 30
-Section 45
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-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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