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Segmented Information - Schedule of Reconciliations of Segments Gross Profits and Certain Unallocated Costs to Consolidated Gross Profits (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 30, 2019 | Mar. 31, 2018 | [1] | Mar. 25, 2017 | [1]
Segment Reporting [Abstract] |  |  |
Unadjusted gross profit | $ 60,055 | $ 57,755 | $ 62,852
Inventory provisions | (686) | (1,431) | (416)
Other unallocated costs | (998) | (708) | (1,033)
Adjustment of intercompany profit | 206 | 77 | 129
Gross profit | $ 58,577 | $ 55,693 | $ 61,532
[1] | Recast (refer to note 1)

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