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Other Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Liabilities Disclosure [Abstract] |
Schedule of accrued liabilities |
|  | DECEMBER 31, |
|  | 2018 |  |  | 2017 |
Carrier service costs |  | $ | 8,476,110 |  |  | $ | 7,339,150 |
Salaries and payroll taxes |  |  | 1,308,726 |  |  |  | 1,259,331 |
Inventory purchases, consultants and other costs |  |  | 913,038 |  |  |  | 762,770 |
Severance costs |  |  | 1,634 |  |  |  | 328,109 |
U.S. income tax payable |  |  | 8,550 |  |  |  | 8,850 |
Foreign income tax payable (receivable) |  |  | 8,380 |  |  |  | (1,860 | )
Contingent consideration (Note 3) |  |  | - |  |  |  | 100,000 |
Total accrued expenses |  | $ | 10,716,438 |  |  | $ | 9,796,350 |

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