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Income Taxes (Narrative) (Details) - USD ($)		12 Months Ended
	Jan. 01, 2018	Feb. 02, 2020	Feb. 03, 2019	Jan. 28, 2018	Dec. 31, 2017	Jan. 29, 2017
U.S. corporate income tax	21.00%	21.00%	21.00%	33.90%	35.00%
Income tax benefit due to 2017 Tax Act from remeasuring of deferred tax assets and liabilities				$ 1,500,000
Research and development tax credits			$ 400,000	200,000		$ 100,000
Tax expense for interest or penalties		$ 0	0	$ 0
Unrecognized tax benefits		$ 0	$ 0
Tax Cuts And Jobs Act [Member]
U.S. corporate income tax				33.90%
Federal [Member] | Tax Year 2016 [Member]
Tax years open for tax examination		2016
State [Member] | Tax Year 2015 [Member]
Tax years open for tax examination		2015

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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