Operating Segment, Geographic Information and Significant Customers - Customers Comprising Ten Percent or more Revenues (Details) - Customer Concentration Risk - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Jan. 01, 2021	Dec. 27, 2019	Jan. 01, 2021	Dec. 27, 2019
Revenue, Major Customer [Line Items]
Concentration risk, percentage	37.00%	42.00%	39.00%	53.00%
Raytheon Company
Revenue, Major Customer [Line Items]
Concentration risk, percentage	25.00%	16.00%	24.00%	15.00%
Lockheed Martin Corporation
Revenue, Major Customer [Line Items]
Concentration risk, percentage	12.00%	16.00%	15.00%	17.00%
Northrop Grumman Corporation
Revenue, Major Customer [Line Items]
Concentration risk, percentage		10.00%		10.00%
L3Harris Technologies
Revenue, Major Customer [Line Items]
Concentration risk, percentage				11.00%