Operating Segment, Geographic Information and Significant Customers - Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations (Details) $ in Thousands	3 Months Ended
	Oct. 02, 2020 USD ($) segment	Sep. 27, 2019 USD ($)	Jul. 03, 2020 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	1
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 205,621	$ 177,304
Identifiable long-lived assets	94,744		$ 87,737
Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	50,296	53,419
Modules and Sub-assemblies
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	17,466	35,240
Integrated Subsystems
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	137,859	88,645
Total Sensor & Effector
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	134,579	101,866
Radar
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	72,409	37,919
Electronic Warfare
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	39,075	36,057
Other Sensor & Effector
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	23,095	27,890
C4I
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	53,781	49,011
Other End Applications
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	17,261	26,427
Domestic
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	178,743	157,475
International/Foreign Military Sales
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	26,878	19,829
US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	195,847	161,996
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	9,663	14,440
Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	111	868
Reportable Geographical Components | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	196,087	162,968
Identifiable long-lived assets	89,261		82,588
Reportable Geographical Components | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	10,007	15,091
Identifiable long-lived assets	5,479		5,144
Reportable Geographical Components | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	111	868
Identifiable long-lived assets	4		5
Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(584)	(1,623)
Identifiable long-lived assets	0		$ 0
Geography Eliminations | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	240	972
Geography Eliminations | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	344	651
Geography Eliminations | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 0	$ 0