Operating Segment, Geographic Information and Significant Customers - Customers Comprising Ten Percent or more Revenues (Detail) - Customer Concentration Risk - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Dec. 27, 2019	Dec. 31, 2018	Dec. 27, 2019	Dec. 31, 2018
Revenue, Major Customer [Line Items]
Concentration risk, percentage	42.00%	38.00%	53.00%	33.00%
Raytheon Company
Revenue, Major Customer [Line Items]
Concentration risk, percentage	16.00%	25.00%	15.00%	22.00%
Lockheed Martin Corporation
Revenue, Major Customer [Line Items]
Concentration risk, percentage	16.00%	13.00%	17.00%	11.00%
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%