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Business Combination - Schedule of Unaudited Pro Forma Consolidated Results of Operations (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
May 03, 2020
Apr. 28, 2019
Apr. 29, 2018
Business Combinations [Abstract]      
Net Sales $ 256,166 $ 281,325 $ 334,953
(Loss) income from continuing operations (7,568) 13,351 26,799
Net (loss) income from continuing operations (11,158) 6,071 20,455
Net loss from discontinued operation (17,509) (613)  
Net (loss) income $ (28,667) $ 5,458 $ 20,455
net (loss) income from continuing operations per share-basic $ (0.90) $ 0.49 $ 1.65
net (loss) income from continuing operations per share-diluted (0.90) 0.48 1.62
net loss from discontinued operation per share-basic (1.41) (0.05)  
net loss from discontinued operation per share-diluted (1.41) (0.05)  
Net (loss) income per share - basic (2.32) 0.44 1.65
Net (loss) income per share - diluted $ (2.32) $ 0.43 $ 1.62