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Exit and Disposal Activity - Summary of Restructuring Credit and Related Charges Associated with Exit and Disposal Activity (Parenthetical) (Detail) - USD ($)
 3 Months Ended
Aug. 04, 2019
Jul. 29, 2018
Restructuring (Credit) Expense $ (35,000) $ 451,000
Restructuring (Credit) Expense and Restructuring Related Charges [1],[2] (35,000) 2,016,000
Restructuring Related Charges   1,565,000
Upholstery Fabrics [Member]    
Restructuring (Credit) Expense and Restructuring Related Charges (35,000) 2,016,000
Upholstery Fabrics [Member] | Cost of Sales [Member]    
Restructuring Related Charges   1,600,000
Upholstery Fabrics [Member] | Restructuring expense [Member]    
Restructuring (Credit) Expense $ (35,000) $ 451,000
[1] Of the $2.0 million, $1.6 million and $451,000 were recorded to cost of sales and restructuring expense in the Consolidated Statements of Net Income for the three-month period ending July 29, 2018.
[2] The $35,000 credit was recorded to restructuring credit in the Consolidated Statements of Net Income for the three-month period ending August 4, 2019.