Changes in Accumulated Other Comprehensive Income (Details) - USD ($)	3 Months Ended
	May 02, 2020	May 04, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax	$ 1,423,000	$ (77,000)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(802,000)	403,000
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	504,000	9,000
Unrealized gain on available-for-sale securities, net of deferred income taxes	(298,000)	412,000
Ending Balance Accumulated other comprehensive income, net of tax	1,125,000	335,000
ChangeInUnrealizedGainsOnAvailableForSaleSecuritiesMember [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax	1,423,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax		(802,000)
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax		504,000
Unrealized gain on available-for-sale securities, net of deferred income taxes	(298,000)	$ 412,000
Ending Balance Accumulated other comprehensive income, net of tax	$ 1,125,000