Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Segment	Sep. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable business segments | Segment			2
Revenues from Operations
Revenues from operations	$ 6,338	$ 5,262	$ 18,440	$ 16,745
Operating Income
Total operating income	477	1	1,124	153
Interest (expense) income, net	(5)	(6)	1	(17)
Other income, net	73	24	164	42
Total other income	68	18	165	25
Income Before Income Taxes	545	19	1,289	178
Unallocated corporate expense [Member]
Operating Income
Total operating income	(673)	(311)	(1,239)	(1,013)
Product [Member] | Electronic components [Member]
Revenues from Operations
Revenues from operations	6,028	5,079	17,593	16,097
Product [Member] | Electronic components [Member] | Reportable Segment [Member]
Operating Income
Total operating income	1,126	320	2,297	1,127
Product [Member] | Electronic instruments [Member]
Revenues from Operations
Revenues from operations	310	183	847	648
Product [Member] | Electronic instruments [Member] | Reportable Segment [Member]
Operating Income
Total operating income	$ 24	$ (8)	$ 66	$ 39