Warrants - Schedule of Fair Value of Warrants Classified as Liabilities (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
October 2013 Warrants [Member]
Strike price	$ 15.00	$ 15.00
Expected dividend yield	0.00%	0.00%
October 2013 Warrants [Member] \| Expected Term [Member]
Fair value assumptions, term	4 years 9 months 18 days	5 years 9 months 18 days
October 2013 Warrants [Member] \| Cumulative Volatility [Member]
Fair value assumptions, percentage	89.64%	86.70%
October 2013 Warrants [Member] \| Risk Free Interest Rate [Member]
Fair value assumptions, percentage	2.59%	2.30%
January 2014 Warrants [Member]
Strike price	$ 15.00	$ 15.00
Expected dividend yield	0.00%	0.00%
January 2014 Warrants [Member] \| Expected Term [Member]
Fair value assumptions, term	5 years	6 years
January 2014 Warrants [Member] \| Cumulative Volatility [Member]
Fair value assumptions, percentage	89.76%	87.70%
January 2014 Warrants [Member] \| Risk Free Interest Rate [Member]
Fair value assumptions, percentage	2.60%	2.31%