Segment Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Segment	Dec. 31, 2015 USD ($)
Segment Reporting [Abstract]
Number of reportable business segments | Segment	2
Revenues from Operations [Abstract]
Revenues from operations	$ 20,891	$ 20,713
Operating Income (Loss) from Operations
Consolidated total operating loss	(161)	(788)
Interest expense, net	(22)	(32)
Other income, net	166	117
Total other income	144	85
Loss Before Income Taxes	(17)	(703)
Capital Expenditures [Abstract]
Total capital expenditures	172	422
Total Assets [Abstract]
Total assets	16,646	15,803
Foreign [Member]
Revenues from Operations [Abstract]
Revenues from operations	5,998	5,453
Reportable Segment [Member] | USA [Member]
Revenues from Operations [Abstract]
Revenues from operations	20,691	20,713
Reportable Segment [Member] | Foreign [Member]
Revenues from Operations [Abstract]
Revenues from operations	200
General corporate [Member]
Capital Expenditures [Abstract]
Total capital expenditures	10	10
Total Assets [Abstract]
Total assets	7,100	7,537
Unallocated corporate expense [Member]
Operating Income (Loss) from Operations
Consolidated total operating loss	(1,111)	(1,097)
Electronic components [Member] | Reportable Segment [Member]
Operating Income (Loss) from Operations
Consolidated total operating loss	1,011	309
Capital Expenditures [Abstract]
Total capital expenditures	162	412
Total Assets [Abstract]
Total assets	9,015	8,266
Electronic components [Member] | Reportable Segment [Member] | Foreign [Member]
Revenues from Operations [Abstract]
Revenues from operations		0
LGL_ Electronic Instruments [Member]
Operating Income (Loss) from Operations
Consolidated total operating loss	(61)	0
Capital Expenditures [Abstract]
Total capital expenditures	0	0
Total Assets [Abstract]
Total assets	$ 531	$ 0