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Leases - Summary of Maturities of Lease Obligations (Detail) - USD ($)
$ in Thousands
Dec. 26, 2020
Mar. 28, 2020
Operating Lease Liabilities Payments Due [Abstract]    
Fiscal 2021 $ 1,294  
Fiscal 2022 4,694  
Fiscal 2023 3,754  
Fiscal 2024 1,803  
Fiscal 2025 1,124  
Thereafter 1,879  
Total undiscounted cash flows 14,548  
Less: imputed interest (2,033)  
Lease obligations under operating leases $ 12,515 $ 14,808