Stock Based Compensation - Schedule of Total Stock-based Compensation Expense from Stock Options, Restricted Stock and Warrants (Details) - Stock Options, Restricted Stock and Warrants [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Employees [Member]
Allocated employee and non-employee stock-based compensation expense, Total	$ 214,706	$ 433,682	$ 425,208	$ 893,643
Non Employees [Member]
Allocated employee and non-employee stock-based compensation expense, Total		19,517		40,867
Research and Development Expense [Member]
Allocated employee and non-employee stock-based compensation expense, Total		29,451	(2,672)	60,423
General and Administrative Expense [Member] | Employees [Member]
Allocated employee and non-employee stock-based compensation expense, Total	214,706	404,231	427,880	833,220
General and Administrative Expense [Member] | Non Employees [Member]
Allocated employee and non-employee stock-based compensation expense, Total		$ 19,517		$ 40,867