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Intangible Asset - Tradenames (Detail) - USD ($)
$ in Thousands
Apr. 28, 2019
Apr. 29, 2018
Indefinite-lived Intangible Assets [Line Items]    
Tradenames $ 7,232 $ 683
Read Window Products, LLC [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Tradenames 683 $ 683
eLuxury [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Tradenames $ 6,549