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Stock Based Compensation Additional - (Details) - Class A Common Stock - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020	Jan. 30, 2021
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation Expense	$ 13,551,000		$ 13,551,000		$ 10,550,000
Remaining Weighted-Average Vesting Period			2 years 9 months 18 days		2 years 1 month 6 days
Compensation Expense	$ 1,597,000	$ 1,253,000	$ 1,880,000	$ 1,859,000
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Sold			20,584	26,957
Compensation Expense			$ 26,000	$ 44,000
Employee Stock Purchase Plan Share Purchase Discount	$ 1.26	$ 1.64	$ 1.26	$ 1.64