Warrants - Schedule of Fair Value of Warrants Classified as Liabilities (Details)	6 Months Ended
	Jun. 30, 2019 $ / shares	Jun. 30, 2018 $ / shares
October 2013 Warrants [Member]
Strike price	$ 15.00	$ 15.00
October 2013 Warrants [Member] \| Expected Dividend Yield [Member]
Fair value assumptions, percentage	0.0000	0.0000
October 2013 Warrants [Member] \| Contractual Term [Member]
Fair value assumptions, term	4 years 3 months 19 days	5 years 3 months 26 days
October 2013 Warrants [Member] \| Cumulative Volatility [Member]
Fair value assumptions, percentage	0.8762	0.8817
October 2013 Warrants [Member] \| Risk Free Interest Rate [Member]
Fair value assumptions, percentage	0.0174	0.0274
January 2014 Warrants [Member]
Strike price	$ 15.00	$ 15.00
January 2014 Warrants [Member] \| Expected Dividend Yield [Member]
Fair value assumptions, percentage	0.0000	0.0000
January 2014 Warrants [Member] \| Contractual Term [Member]
Fair value assumptions, term	4 years 7 months 6 days	5 years 6 months 18 days
January 2014 Warrants [Member] \| Cumulative Volatility [Member]
Fair value assumptions, percentage	0.8939	0.8859
January 2014 Warrants [Member] \| Risk Free Interest Rate [Member]
Fair value assumptions, percentage	0.0175	0.0275