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Discontinued Operations (Schedule Of Loss On Sale Of Discontinued Operations) (Details) - USD ($)
$ in Thousands
9 Months Ended
Feb. 17, 2017
Sep. 30, 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    
Fair value of consideration received    
Loss on sale of discontinued operations, net of income taxes $ 164