Segment Information - Schedule of Reportable Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues
Revenues from operations	$ 8,108	$ 6,536
Operating Income (Loss)
Total operating income (loss)	221	(60)
Interest expense, net	(7)	(3)
Loss on equity investment in unconsolidated subsidiary		(76)
Investment income	45	127
Other (expense) income, net	(16)	45
Total other income, net	22	93
INCOME BEFORE INCOME TAXES	243	33
Unallocated corporate expense [Member]
Operating Income (Loss)
Total operating income (loss)	(841)	(425)
Electronic components [Member]
Revenues
Revenues from operations	7,691	6,254
Electronic components [Member] | Reportable Segment [Member]
Operating Income (Loss)
Total operating income (loss)	1,054	349
Electronic instruments [Member]
Revenues
Revenues from operations	417	282
Electronic instruments [Member] | Reportable Segment [Member]
Operating Income (Loss)
Total operating income (loss)	$ 8	$ 16