Other Current Liabilities (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Carrier service costs	$ 11,832,170	$ 12,274,440
Salaries and payroll taxes	2,774,138	1,781,628
Inventory purchases, consultants and other costs	1,004,303	834,131
Severance costs	7,612	7,612
U.S. income tax payable	28,130	8,850
Foreign income tax payable (receivable)	(20,040)	41,320
Total accrued expenses	$ 15,626,313	$ 14,947,981