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Exit and Disposal Activity - Summary of Activity in Restructuring Accrual (Detail) - USD ($)
$ in Thousands
9 Months Ended
Feb. 02, 2020
Jan. 27, 2019
Restructuring Cost and Reserve [Line Items]    
Beginning balance [1] $ 124  
Ending balance   $ 228
Upholstery Fabrics [Member] | Employee Termination Benefits [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 124  
Accrual established in fiscal 2019   451
Payments (54) (434)
Adjustments $ (70) 211
Ending balance   $ 228
[1] Derived from audited financial statements.