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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Oct. 30, 2021
Oct. 31, 2020
Oct. 30, 2021
Oct. 31, 2020
Jan. 31, 2021
Income tax expense (benefit) $ (174,000) $ (32,000) $ 297,000 $ 379,000  
Changes to unrecognized tax benefits 0        
Cumulative unrecognized tax benefits 221,000   221,000   $ 384,000
Tax expense resulting from shortfall 100,000   118,000    
Tax Adjustments, Settlements, and Unusual Provisions 30,000   $ 300,000 78,000  
Tax expenses benefits resulting from provisional adjustments       $ 79,000  
Forgiveness Of Loan Under Paycheck Protection Programme [Member]          
Tax benefits resulting from forgiveness of debt $ 1,100,000