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Leases - Supplemental cash flow information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Cash paid for amounts included in the measurement of lease liabilities [Abstract]        
Operating cash flows for operating leases $ 102 $ 108 $ 333 $ 306