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Commitments and Contingencies (Detail) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended
May 16, 2016
Apr. 30, 2016
Oct. 29, 2017
Apr. 30, 2017
Oct. 30, 2016
Commitments and Contingencies Disclosure [Line Items]          
Accounts payable for capital expenditures     $ 3,200,000 $ 6,100,000 $ 3,000,000
Buildings and Improvements [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Amount financed for construction of building     2,700,000 5,100,000 $ 1,500,000
Amount financed for construction of building required to be paid for remainder of fiscal 2018     1,300,000    
Amount financed for construction of building required to be paid in fiscal 2019     1,400,000    
Mattress Fabrics [Member] | Capital Addition Purchase Commitments [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Open purchase commitments     3,800,000    
Mattress Fabrics [Member] | Capital Addition Purchase Commitments [Member] | Buildings and Improvements [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Open purchase commitments     $ 2,700,000    
Contractual obligation, current cost $ 11,300,000        
Contractual obligation paid   $ 1,900,000   $ 4,300,000  
Contractual obligation due in fiscal 2018 3,700,000        
Contractual obligation due in fiscal 2019 1,400,000        
Mattress Fabrics [Member] | Capital Addition Purchase Commitments [Member] | Buildings and Improvements [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Percentage rate added to variable rate     2.25%    
Variable interest rate     30 day LIBOR rate    
Mattress Fabrics [Member] | Capital Addition Purchase Commitments [Member] | Buildings and Improvements [Member] | Letter of Credit [Member]          
Commitments and Contingencies Disclosure [Line Items]          
Letter of credit $ 5,000,000        
Unused fee calculated on letter of credit 0.10%