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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail)
12 Months Ended
Mar. 27, 2021
Mar. 28, 2020
Mar. 30, 2019
Income Tax Disclosure [Abstract]      
Canadian statutory rate 26.20% 26.60% 26.80%
Rate differential for U.S. operations 0.00% 0.00% 0.10%
Utilization of unrecognized losses and other tax attributes (27.30%) (26.40%) (26.20%)
Permanent differences and other 1.10% (0.20%) (0.70%)
Total 0.00% 0.00% 0.00%