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Other Assets (Detail) - USD ($)
$ in Thousands
Oct. 29, 2017
Apr. 30, 2017
Oct. 30, 2016
Other Assets, Noncurrent [Abstract]      
Cash surrender value - life insurance $ 376 $ 376 $ 358
Non-compete agreement, net 790 828 866
Customer relationships, net 638 664 689
Other 536 526 582
Other assets $ 2,340 $ 2,394 [1] $ 2,495
[1] Derived from audited financial statements.