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Bank Indebtedness - Summary of Company's Senior Credit Facility (Detail) - Senior Secured Notes [Member] - USD ($)
$ in Thousands
12 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Line of Credit Facility [Line Items]    
Maximum borrowing outstanding during the year $ 64,702 $ 55,596
Average outstanding balance during the year $ 56,001 $ 44,772
Weighted average interest rate for the year 4.20% 3.90%
Effective interest rate at year-end 3.80% 4.20%