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Sale of Assets - Additional Information (Detail) - USD ($)
$ in Thousands
Aug. 04, 2015
Mar. 31, 2018
Mar. 25, 2017
 [1]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Gross proceeds from sale of assets $ 4,300    
Amount of inventory included in sale of assets   $ 65,793 $ 65,894
Rideau [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Amount of inventory included in sale of assets 800    
Gain on disposal of assets 3,200    
Royalty receivables, First year 4,500    
Royalty receivables, Second year 4,500    
Royalty receivables, Third year 4,500    
Royalty receivables, Thereafter $ 2,000    
[1] Retrospectively revised (see note 18)