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Discontinued Operations (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract] |  |
Consideration payable by ORBCOMM aggregate | $ 6,123,000 |
Amount of cash receivable as consideration | 4,000,000 |
Value of common stock receivable as consideration | 2,123,000 |
Amount held in escrow to settle future claims | 1,274,000 |
Contingent consideration payable by ORBCOMM, maximum | 3,950,000 |
Contingent consideration payable if new subscriber targets are met, maximum | 3,000,000 |
Contingent consideration payable if sales targets are met, maximum | 950,000 |
Number of days for which average closing price is taken for shares | 20 days |
Assets |  |
Less cash and equivalents of discontinued operations at end of period | 0 | (6,000)
Accounts receivable - net | 0 | 1,398,000
Inventories | 0 | 1,355,000
Other assets | 0 | 423,000
Total assets of discontinued operations | 0 | 3,182,000
Liabilities |  |
Accounts payable and accrued expenses | 141,000 | 674,000
Accrued salaries and benefits | 0 | 236,000
Other liabilities | 0 | 15,000
Total liabilities of discontinued operations | 141,000 | 925,000
Operations [Abstract] |  |
Total revenues | 136,000 | 6,433,000
Loss from discontinued operations before income taxes | (348,000) | (3,525,000)
Gain on disposition | 2,588,000 | 0
(Provision) benefit for income taxes | (793,000) | 1,353,000
Income (loss) from discontinued operations | $ 1,447,000 | $ (2,172,000)

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