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Income Taxes - Income Tax Expense (Parenthetical) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
May 03, 2020
Apr. 28, 2019
Apr. 29, 2018
Income Tax Disclosure [Abstract]      
2017 Tax Cuts and Jobs Act income tax benefit [1]   $ (268) $ (6,903)
establishment of valuation allowance     4,550
income tax expense (benefit) [1] $ 2,400 (4,456) 116
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount   (4,500)  
undistributed earnings – foreign subsidiaries $ (114) $ 3,735 $ (195)
[1] The income tax benefit of $6,903 recorded during fiscal 2018 included a charge of $4,550 for the establishment of a valuation allowance against U.S. foreign tax credits that were not more-likely-than not to be realized as a result of the 2017 Tax Cuts and Jobs Act. During fiscal 2019, we recorded an income tax charge of $4.5 million for the write-off of certain U.S. foreign tax credits, and in turn, we recorded an income tax benefit of $4.5 million for the reduction in our valuation allowance. The $4.5 million income charge for the write-off of certain U.S. foreign tax credits is included in the undistributed earnings – foreign subsidiaries income tax expense amount of $3,735.