Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Estimated Values of Warrants Valuation Assumptions

The estimated values of warrants, as well as the assumptions that were used in calculating such values were based on estimates at the issuance date as follows:

	Placement Agent December 30, 2016			Bridge Noteholders September 21, 2017
Risk-free interest rate		1.93	%		1.89	%
Weighted average expected term		5 years			5 years
Expected volatility		123.07	%		130.80	%
Expected dividend yield		0.00	%		0.00	%

	Placement Agent November 17, 2017			Placement Agent November 30, 2017
Risk-free interest rate		2.06	%		2.14	%
Weighted average expected term		5 years			5 years
Expected volatility		129.87	%		129.34	%
Expected dividend yield		0.00	%		0.00	%

	Placement Agent September 20, 2018			Placement Agent September 26, 2018
Risk-free interest rate		2.96	%		2.96	%
Weighted average expected term		5 years			5 years
Expected volatility		122.52	%		122.92	%
Expected dividend yield		0.00	%		0.00	%