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Goodwill and Intangible Assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) - USD ($)
$ in Thousands
Apr. 28, 2018
Apr. 29, 2017
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
2019 $ 1,200  
2020 331  
2021 328  
2022 303  
2023 303  
Thereafter 1,217  
Finite-Lived Intangible Assets, Net $ 3,682 $ 4,705