Operating Segment, Geographic Information and Significant Customers - Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021 USD ($)	Jan. 01, 2021 USD ($)	Dec. 31, 2021 USD ($) segment	Jan. 01, 2021 USD ($)	Jul. 02, 2021 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			1
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 220,380	$ 210,676	$ 445,393	$ 416,297
Identifiable long-lived assets	127,385		127,385		$ 128,524
Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	31,471	40,679	66,536	90,975
Modules and Sub-assemblies
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	65,332	34,993	124,362	52,459
Integrated Subsystems
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	123,577	135,004	254,495	272,863
Total Sensor & Effector
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	105,705	137,437	229,992	269,829
Radar
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	51,172	84,760	110,076	157,169
Electronic Warfare
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	32,369	28,672	66,310	65,560
Other Sensor & Effector
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	22,164	24,005	53,606	47,100
C4I
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	90,931	58,359	174,332	112,140
Other End Applications
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	23,744	14,880	41,069	34,328
Domestic
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	186,592	181,095	375,840	359,838
International/Foreign Military Sales
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	33,788	29,581	69,553	56,459
US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	209,495	197,773	423,236	393,620
Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	10,808	12,812	21,995	22,475
Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	77	91	162	202
Reportable Geographical Components | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	211,083	198,409	426,383	394,496
Identifiable long-lived assets	122,708		122,708		123,009
Reportable Geographical Components | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	11,407	13,376	23,323	23,383
Identifiable long-lived assets	4,672		4,672		5,509
Reportable Geographical Components | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	77	91	162	202
Identifiable long-lived assets	5		5		6
Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(2,187)	(1,200)	(4,475)	(1,784)
Identifiable long-lived assets	0		0		$ 0
Geography Eliminations | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	1,588	636	3,147	876
Geography Eliminations | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	599	564	1,328	908
Geography Eliminations | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 0	$ 0	$ 0	$ 0