Changes in Accumulated Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Jan. 29, 2022	Jan. 30, 2021	Feb. 01, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax	$ 1,155,000	$ 1,423,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(1,561,000)	(1,038,000)
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	126,000	770,000
Unrealized losses on available-for-sale securities, net of deferred income tax benefit	(1,435,000)	(268,000)	$ 1,500,000
Ending Balance Accumulated other comprehensive income, net of tax	$ (280,000)	$ 1,155,000	$ 1,423,000