Stockholders' Deficit - Schedule of Outstanding Vested and Unexercised Common Stock Warrants (Details) - Unexercised Common Stock Warrants [Member]	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Warrants	833,257
2010 [Member]
Exercise Price | $ / shares	$ 4.40
Number of Warrants	22,659
Warrants Expiration Date	Feb. 04, 2020
April 2013 [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	5,000
Warrants Expiration Date	Apr. 28, 2020
September 2013 [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	5,000
Warrants Expiration Date	Sep. 04, 2020
September 2013 (1) [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	2,500
Warrants Expiration Date	Sep. 20, 2020
November 2013 [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	7,500
Warrants Expiration Date	Nov. 14, 2020
July 2014 (1) [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	50,000
Warrants Expiration Date	Jun. 30, 2020
July 2014 (2) [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	4,667
Warrants Expiration Date	Jul. 02, 2019
September 2014 (1) [Member]
Exercise Price | $ / shares	$ 16.20
Number of Warrants	62,500
Warrants Expiration Date	Aug. 31, 2021
September 2014 (2) [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	11,800
Warrants Expiration Date	Sep. 18, 2021
September 2014 (3) [Member]
Exercise Price | $ / shares	$ 10.00
Number of Warrants	8,959
Warrants Expiration Date	Sep. 29, 2021
October 2014 [Member]
Exercise Price | $ / shares	$ 15.80
Number of Warrants	316,456
Warrants Expiration Date	Oct. 23, 2019
May 2015 [Member]
Exercise Price | $ / shares	$ 15.80
Number of Warrants	189,874
Warrants Expiration Date	May 04, 2020
February 2016 [Member]
Exercise Price | $ / shares	$ 20.50
Number of Warrants	146,342
Warrants Expiration Date	Feb. 23, 2021