Segment Information - Schedule of Reportable Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues from Operations
Revenues from operations	$ 8,071	$ 8,588	$ 23,748	$ 23,058
Operating Income
Total operating income	709	1,122	1,553	2,412
Interest (expense) income, net	(3)		(7)	1
Loss on equity investment in unconsolidated subsidiary	(61)		(200)
Other income (expense), net	155	82	3	352
Total other income (expense)	91	82	(204)	353
INCOME BEFORE INCOME TAXES	800	1,204	1,349	2,765
Unallocated corporate expense [Member]
Operating Income
Total operating income	(314)	(464)	(729)	(992)
Electronic components [Member]
Revenues from Operations
Revenues from operations	7,860	8,218	22,905	22,011
Electronic components [Member] | Reportable Segment [Member]
Operating Income
Total operating income	1,064	1,493	2,249	3,147
Electronic instruments [Member]
Revenues from Operations
Revenues from operations	211	370	843	1,047
Electronic instruments [Member] | Reportable Segment [Member]
Operating Income
Total operating income	$ (41)	$ 93	$ 33	$ 257