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Financial Instruments - Additional Information (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 25, 2017
Fair Value Disclosures [Abstract]    
Bank indebtedness $ 28,640 $ 44,840 [1]
Long-term debt bearing interest at variable rates 1,800 4,500
Fixed-rate long-term debt 4,600 2,000
Fair value of fixed long-term debt and other long-term liabilities $ 4,500 $ 1,900
[1] Retrospectively revised (see note 18)