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Discontinued Operations (Schedule Of Financial Results And Financial Position Of Discontinued Operations) (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2011
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| Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] | |
| 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 | $ 14,000 |