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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 27, 2019
Apr. 28, 2018
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items]    
Weighted Average Life (in years) 6 years 7 years 9 months
Gross Carrying Amount $ 9,852 $ 6,646
Accumulated Amortization 4,946 2,964
Definite-lived, Net Value 4,906 3,682
Intangibles, net $ 4,906 $ 3,682
Trademarks    
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items]    
Weighted Average Life (in years) 19 years 6 months 20 years
Gross Carrying Amount $ 679 $ 709
Accumulated Amortization 148 118
Definite-lived, Net Value $ 531 $ 591
Software    
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items]    
Weighted Average Life (in years) 3 years 3 years
Gross Carrying Amount $ 6,330 $ 2,978
Accumulated Amortization 3,807 2,109
Definite-lived, Net Value $ 2,523 $ 869
Customer Relationships    
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items]    
Weighted Average Life (in years) 10 years 10 years
Gross Carrying Amount $ 2,720 $ 2,859
Accumulated Amortization 888 637
Definite-lived, Net Value $ 1,832 $ 2,222
Other    
Schedule of Definite-Lived Intangible and Indefinite-Lived Intangible Assets [Line Items]    
Weighted Average Life (in years) 1 year 5 months 1 year
Gross Carrying Amount $ 123 $ 100
Accumulated Amortization 103 100
Definite-lived, Net Value $ 20 $ 0