Accounts Payable and Accrued Expenses (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2019

Dec. 31, 2018

Payables and Accruals [Abstract]

Schedule of accounts payable and accrued expenses

	2019		2018
Trade payables	$	330,963	$	401,272
Accrued interest		460,334		401,667
Accrued payroll and related obligations		236,688		260,153
Operating lease liabilities		267,960		—
Other accrued expenses		266,983		239,134
	$	1,562,928	$	1,302,226

	2018		2017
Trade payables	$	401,272	$	232,842
Accrued interest		401,667		275,000
Accrued payroll and related		260,153		468,012
Other		284,134		471,331
Total	$	1,347,226	$	1,447,185