Discontinued Operations (Schedule Of Loss On Sale Of Discontinued Operations) (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 17, 2017	Mar. 31, 2017	Dec. 31, 2016
Loss on sale of discontinued operations, net of income taxes		$ 164
Discontinued Operations, Disposed of by Sale [Member] | Cardiac Diagnostic Monitoring Business [Member]
Accounts receivable, net	$ 179		$ 123
Accrued liabilities	(15)
Net assets sold	164
Loss on sale of discontinued operations, net of income taxes	$ (164)