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Income Taxes (Reconciliation of Income Tax Expense to Amount Computed at Federal Statutory Rate) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2018	Feb. 02, 2020	Feb. 03, 2019	Jan. 28, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Federal taxes at statutory rate		$ 5,114	$ 6,637	$ 11,939
Statutory rate change				(1,510)
State and local income taxes, net of federal benefit		965	1,679	1,410
Research and development tax credits		(487)
Other		(163)	134	39
Total income tax expense		$ 5,429	$ 8,450	$ 11,878
Federal taxes at statutory rate	21.00%	21.00%	21.00%	33.90%	35.00%
Statutory rate change				(4.30%)
State and local income taxes, net of federal benefit		4.00%	5.30%	4.00%
Research and development tax credits		(2.00%)
Other		(0.70%)	0.40%	0.10%
Total income tax expense		22.30%	26.70%	33.70%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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