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Discontinued Operations and Disposal Group - Schedule of Reconciliation of Gain on Sale of Subsidiary (Detail) - USD ($)
 12 Months Ended
Oct. 23, 2017
Aug. 11, 2017
Mar. 31, 2018
Mar. 25, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Accounts receivable       $ 11,007,000
Inventory       66,175,000
Property and equipment       9,076,000
Intangible assets       298,000
Other assets       183,000
Deferred income tax asset       5,303,000
Other long-term liabilities       (2,290,000)
Total assets       $ 92,822,000
Gain on disposal, net of taxes of nil     $ 29,882,000  
Mayors Disposal Group [Member]        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Cash proceeds on disposal $ 106,756,000      
Legal and professional fees incurred as a result of the Aurum Transaction (2,893,000) $ 2,900    
Cash 2,438,000      
Accounts receivable 12,421,000      
Inventory 70,469,000      
Prepaid expenses 878,000      
Property and equipment 8,839,000      
Intangible assets 271,000      
Other assets 193,000      
Deferred income tax asset 5,303,000      
Accounts payable (21,518,000)      
Accrued expenses (2,809,000)      
Long-term debt (263,000)      
Other long-term liabilities (2,241,000)      
Total assets 73,981,000      
Gain on disposal, net of taxes of nil $ 29,882,000