Other Current Assets and Accrued Expenses (Details 1) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Other Assets [Abstract]
Carrier service costs	$ 12,309,240	$ 8,476,110
Salaries and payroll taxes	1,364,218	1,308,726
Inventory purchases, consultants and other costs	761,822	913,038
Severance costs	7,612	1,634
U.S. income tax payable	5,900	8,550
Foreign income tax payable (receivable)	16,530	8,380
Total accrued expenses	$ 14,465,322	$ 10,716,438