Segment Information - Schedule of Reportable Business Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues from Operations
Revenues from operations	$ 31,162	$ 31,897
Operating Income from Operations
Consolidated total operating income	1,415	3,439
Interest (expense) income, net	(11)	2
Loss on equity investment in unconsolidated subsidiary	(262)	(16)
Other income, net	162	484
Total other (expense) income, net	(111)	470
INCOME BEFORE INCOME TAXES	1,304	3,909
Capital Expenditures
Total capital expenditures	407	1,163
Total Assets
Total assets	43,455	39,217
Unallocated corporate expense [Member]
Operating Income from Operations
Consolidated total operating income	(1,514)	(1,544)
Total Assets
Total assets	27,335	21,828
Electronic components [Member]
Revenues from Operations
Revenues from operations	29,980	30,553
Electronic components [Member] | Reportable Segment [Member]
Operating Income from Operations
Consolidated total operating income	2,844	4,726
Capital Expenditures
Total capital expenditures	407	1,163
Total Assets
Total assets	15,014	16,218
Electronic instruments [Member]
Revenues from Operations
Revenues from operations	1,182	1,344
Electronic instruments [Member] | Reportable Segment [Member]
Operating Income from Operations
Consolidated total operating income	85	257
Total Assets
Total assets	$ 1,106	$ 1,171