Discontinued Operations (Schedule Of Discontinued Operations Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets of discontinued operations	$ 123	$ 1,086
Other assets of discontinued operations		33
Current liabilities of discontinued operations	123	116
Discontinued Operations, Disposed of by Sale [Member] | Cardiac Diagnostic Monitoring Business [Member]
Accounts receivable, net	123	243
Inventory		837
Other current assets		6
Current assets of discontinued operations	123	1,086
Other assets		33
Other assets of discontinued operations		33
Accounts payable	22	22
Accrued compensation and other liabilities	101	94
Current liabilities of discontinued operations	$ 123	$ 116