Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Segment	Sep. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable business segments | Segment			2
Revenues from Operations
Revenues from operations	$ 5,262	$ 5,128	$ 16,745	$ 15,115
Operating Income (Loss) from Operations
Consolidated operating income (loss)	1	(28)	153	(164)
Interest expense, net	(6)	(7)	(17)	(20)
Other income, net	24	67	42	105
Total other income	18	60	25	85
Income (Loss) Before Income Taxes	19	32	178	(79)
Unallocated corporate expense [Member]
Operating Income (Loss) from Operations
Consolidated operating income (loss)	(311)	(253)	(1,013)	(727)
Electronic components [Member]
Revenues from Operations
Revenues from operations	5,080	5,114	16,097	15,101
Electronic components [Member] | Reportable Segment [Member]
Operating Income (Loss) from Operations
Consolidated operating income (loss)	321	279	1,127	617
Electronic instruments [Member]
Revenues from Operations
Revenues from operations	182	14	648	14
Electronic instruments [Member] | Reportable Segment [Member]
Operating Income (Loss) from Operations
Consolidated operating income (loss)	$ (9)	$ (54)	$ 39	$ (54)