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Discontinued Operations (Schedule of Assets and Liabilities Acquired) (Details) - USD ($) | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Current liabilities: |  |
Total current liabilities | $ 16,340 | $ 181,340
BDI [Member] |  |
Current liabilities: |  |
Accounts payable | 16,000 | 16,000
Accrued expenses |  | 28,000
Deferred revenue |  | 137,000
Total current liabilities | $ 16,000 | $ 181,000

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