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Investments in Affiliates (Details) - USD ($)
$ in Thousands
6 Months Ended
Nov. 02, 2019
Oct. 27, 2018
Apr. 27, 2019
Equity and Cost Method Investments [Abstract]      
Equity Method Investments $ 3,415   $ 3,657
Equity in loss of affiliate (241) $ (265)  
Cost Method Investments $ 42   $ 42