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Goodwill and Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($)
$ in Thousands
Apr. 29, 2017
Apr. 30, 2016
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
2018 $ 1,250  
2019 1,132  
2020 312  
2021 308  
2022 285  
Thereafter 1,418  
Finite-Lived Intangible Assets, Net $ 4,705 $ 7,721