Changes in Accumulated Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance Accumulated other comprehensive income, net of tax	$ (321,000)	$ (214,000)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	278,000	(135,000)
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	(34,000)	28,000
Unrealized losses on available-for-sale securities, net of deferred income tax benefit	244,000	(107,000)	$ (1,014,000)
Ending Balance Accumulated other comprehensive income, net of tax	$ (77,000)	$ (321,000)	$ (214,000)