Basis of Presentation and Significant Accounting Policies - Additional Information (Details)		3 Months Ended		9 Months Ended
	Sep. 08, 2022 shares	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Segment Subsidiaries Divisions	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Number of business segments | Segment				2
Allowance for doubtful accounts		$ 4,000		$ 4,000		$ 4,000
Accrued revenue		2,474,000		2,474,000		2,283,000
Cash		2,083,000		2,083,000		1,599,000
Uncertain tax positions		0		$ 0		0
Effective tax from continuing operations				(1.00%)	(6.60%)
Income tax (benefit) provision		(10,000)	$ 18,000	$ (3,000)	$ 139,000
Federal statutory income tax rate				21.00%	21.00%
RF Solutions [Member]
Number of subsidiaries | Subsidiaries				2
Defense and Power Systems [Member]
Number of subsidiaries | Subsidiaries				3
Number of division | Divisions				1
United Kingdom (U.K) [Member]
Cash		1,043,000		$ 1,043,000		933,000
Israel
Cash		$ 554,000		$ 554,000		$ 61,000
GWW [Member]
Percentage of acquired capital stock	100.00%
Number of shares issued upon conversion | shares	3,960,043
Percentage of ownership of outstanding common stock, maximum	69.60%
Series F Convertible Preferred Stock [Member] | GWW [Member]
Number of shares exchanged | shares	514.8
Common Stock [Member] | GWW [Member]
Number of shares exchanged | shares	2,920,085
Accounting Standards Update 2021-10 [Member]
Change in accounting principle accounting standards update adopted		true		true
Change in accounting principle accounting standards update adoption date		Dec. 15, 2021		Dec. 15, 2021
Change in accounting principle accounting standards update immaterial effect		true		true
ASU 2021-04 [Member]
Change in accounting principle accounting standards update adopted		true		true
Change in accounting principle accounting standards update adoption date		Jan. 01, 2022		Jan. 01, 2022
Change in accounting principle accounting standards update immaterial effect		true		true
ASU 2020-06 [Member]
Change in accounting principle accounting standards update early adoption		true		true
Change in accounting principle accounting standards update adoption date		Jan. 01, 2022		Jan. 01, 2022
Change in accounting principle accounting standards update immaterial effect		true		true
Minimum [Member]
Vesting Term				2 years
Maximum [Member]
Vesting Term				4 years
Maximum [Member] | GWW [Member]
Share exchange agreement, number of shares of common stock | shares	749,626