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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020	Jan. 31, 2021
Income tax expense (benefit)	$ 699,000	$ 529,000	$ 471,000	$ 411,000
Changes to unrecognized tax benefits	0
Cumulative unrecognized tax benefits	221,000		221,000		$ 384,000
Tax expense resulting from shortfall	100,000	100,000	100,000	100,000
Tax Adjustments, Settlements, and Unusual Provisions			300,000	100,000
Tax expenses benefits resulting from provisional adjustments	32,000	$ 100,000	32,000	$ 100,000
Forgiveness Of Loan Under Paycheck Protection Programme [Member]
Tax benefits resulting from forgiveness of debt	$ 1,100,000		$ 1,100,000

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

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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 income (loss) exempt from income taxes.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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