Discontinued Operations (Schedule Of Financial Results And Financial Position Of Discontinued Operations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations [Abstract]
Net sales		$ 246,000
Expenses		(314,000)
Net loss before income taxes		(68,000)
Income tax benefit		18,000
Net loss of discontinued operations		(50,000)
Property and equipment		2,000
Inventories		17,000
Accounts receivable		35,000
Net assets disposed		54,000
Accrued expenses		10,000
Deferred revenue		58,000
Net liabilities disposed		68,000
Net cash paid to ADI	$ 0	$ 14,000