Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail) |
12 Months Ended | ||
|---|---|---|---|
Mar. 28, 2020 |
Mar. 30, 2019 |
Mar. 31, 2018 |
|
| Income Tax Disclosure [Abstract] | |||
| Canadian statutory rate | 26.60% | 26.80% | 26.60% |
| Rate differential for U.S. operations | 0.00% | 0.10% | 0.40% |
| Utilization of unrecognized losses and other tax attributes | (26.40%) | (26.20%) | (27.10%) |
| Permanent differences and other | (0.20%) | (0.70%) | 0.10% |
| Total | 0.00% | 0.00% | 0.00% |