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Discontinued Operations (Schedule Of Financial Results And Financial Position Of Discontinued Operations) (Details) (USD $) | 12 Months Ended
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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

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