Discontinued Operations (Summary Of Results Of Discontinued Operations) (Details) - Cardiac Diagnostic Monitoring Business [Member] - Discontinued Operations, Disposed of by Sale [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Sales, net		$ 140
Operating costs and expenses	$ (15)	(268)
Net loss from discontinued operations	$ (15)	$ (128)