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Other Current Assets and Accrued Expenses (Tables) | 3 Months Ended
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Mar. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Schedule of Other Current Assets [Table Text Block] | Other current assets consisted of the following as of the periods presented below:
|  | MARCH 31, |  | DECEMBER 31, |
|  | 2018 |  | 2017 |
|  | (Unaudited) |
Inventories |  | $ | 327,357 |  | $ | 157,058 |
Prepaid rent, insurance and other assets |  |  | 707,029 |  |  | 610,886 |
Total other current assets |  | $ | 1,034,386 |  | $ | 767,944 |
Schedule of Accrued Liabilities [Table Text Block] | Accrued expenses consisted of the following as of the periods presented below:
|  | MARCH 31, |  | DECEMBER 31, |
|  | 2018 |  | 2017 |
|  | (Unaudited) |
Carrier service costs |  | $ | 5,593,250 |  | $ | 7,339,150 |
Salaries and payroll taxes |  |  | 1,279,566 |  |  | 1,259,331 |
Inventory purchases, consultants and other costs |  |  | 705,750 |  |  | 762,770 |
Severance costs |  |  | 121,507 |  |  | 328,109 |
U.S. income tax payable |  |  | 8,850 |  |  | 8,850 |
Foreign income tax (receivable) |  |  | (7,160) |  |  | (1,860) |
Contingent consideration (Note 3) |  |  | 100,000 |  |  | 100,000 |
Total accrued expenses |  | $ | 7,801,763 |  | $ | 9,796,350 |

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- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
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