Segment Information - Schedule of Reportable Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues from Operations
Revenues from operations	$ 6,536	$ 8,618
Operating (Loss) Income
Total operating (loss) income	(60)	660
Interest expense, net	(3)
Loss on equity investment in unconsolidated subsidiary	(76)	(39)
Other income (expense), net	172	(384)
Total other income (expense), net	93	(423)
INCOME BEFORE INCOME TAXES	33	237
Unallocated corporate expense [Member]
Operating (Loss) Income
Total operating (loss) income	(425)	(248)
Electronic components [Member]
Revenues from Operations
Revenues from operations	6,254	8,276
Electronic components [Member] | Reportable Segment [Member]
Operating (Loss) Income
Total operating (loss) income	349	871
Electronic instruments [Member]
Revenues from Operations
Revenues from operations	282	342
Electronic instruments [Member] | Reportable Segment [Member]
Operating (Loss) Income
Total operating (loss) income	$ 16	$ 37