Segment Information (Tables)

6 Months Ended

Jun. 30, 2016

Segment Information [Abstract]

Financial Information Relating To Continuing Operating Segments

	Three Months Ended				Six Months Ended
	June 30				June 30
	2016		2015		2016		2015
External sales
Production monitoring	$	2,009	$	2,048	$	3,725	$	3,933
Total	$	2,009	$	2,048	$	3,725	$	3,933
Income before income taxes
Production monitoring	$	217	$	129	$	82	$	161
Investments		0		635		0		1,451
Total	$	217	$	764	$	82	$	1,612