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Concentration of Risk (Details) - Revenue
3 Months Ended 6 Months Ended
Sep. 29, 2019
Sep. 30, 2018
Sep. 29, 2019
Sep. 30, 2018
Customer Concentration Risk | Largest customer        
Concentration Risk        
Concentration risk (as a percent) 10.50%      
Supplier Concentration Risk | Largest wireless infrastructure supplier        
Concentration Risk        
Concentration risk (as a percent) 21.90% 17.00% 21.70% 15.60%