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Income Taxes - Summary of Valuation Allowances Against Net Deferred Income Taxes (Detail) - USD ($)
$ in Thousands
Oct. 31, 2021
May 02, 2021
Nov. 01, 2020
Valuation Allowance [Line Items]      
Valuation allowance $ 11,485 $ 11,674 $ 10,824
Capital Loss Carry Forwards and Credits [Member]      
Valuation Allowance [Line Items]      
Valuation allowance 2,330 2,330 2,281
U.S. Federal and State [Member] | Deferred Income Tax Assets [Member]      
Valuation Allowance [Line Items]      
Valuation allowance $ 9,155 $ 9,344 $ 8,543