Other Current Liabilities (Tables)

12 Months Ended

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