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Leases - Lease Cost Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
General and Administrative Expense [Member]        
Operating Lease Costs $ 124 $ 122 $ 260 $ 242