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Inventories - Continuity of the Inventory Reserves (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Mar. 30, 2019
Inventory Disclosure [Abstract]      
Beginning balance $ 1,847 $ 1,895 $ 1,919
Additional charges 291 342 647
Deductions (200) (390) (671)
Ending balance $ 1,938 $ 1,847 $ 1,895