Segmented Information - Schedule of Reconciliations of Segments Gross Profits and Certain Unallocated Costs to Consolidated Gross Profits (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Mar. 28, 2020 |
Mar. 30, 2019 |
Mar. 31, 2018 |
|
| Segment Reporting [Abstract] | |||
| Unadjusted gross profit | $ 68,284 | $ 60,055 | $ 57,755 |
| Inventory provisions | (475) | (686) | (1,431) |
| Other unallocated costs | (3,586) | (998) | (708) |
| Adjustment of intercompany profit | 254 | 206 | 77 |
| Gross profit | $ 64,477 | $ 58,577 | $ 55,693 |