Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable business segments | Segment	2
Revenues from Operations
Revenues from operations	$ 22,402	$ 20,891
Operating Income (Loss) from Operations
Consolidated total operating loss	276	(161)
Interest expense, net	(11)	(22)
Other (expense) income, net	(46)	166
Total other (expense) income	(57)	144
Income (loss) Before Income Taxes	219	(17)
Capital Expenditures
Total capital expenditures	131	172
Total Assets
Total assets	27,555	16,646
Unallocated corporate expense [Member]
Operating Income (Loss) from Operations
Consolidated total operating loss	(1,040)	(1,111)
Capital Expenditures
Total capital expenditures		10
Total Assets
Total assets	14,845	7,100
Electronic components [Member]
Revenues from Operations
Revenues from operations	21,516	20,691
Electronic components [Member] | Reportable Segment [Member]
Operating Income (Loss) from Operations
Consolidated total operating loss	1,260	1,011
Capital Expenditures
Total capital expenditures	131	162
Total Assets
Total assets	11,899	9,015
Electronic instruments [Member]
Revenues from Operations
Revenues from operations	886	200
Electronic instruments [Member] | Reportable Segment [Member]
Operating Income (Loss) from Operations
Consolidated total operating loss	56	(61)
Total Assets
Total assets	$ 811	$ 531