Basic and Diluted Net Loss Per Share - Schedule of Shares of Common Stock Equivalents Were Excluded from the Computation of Diluted Net Loss Per Share (Details) - shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Total common stock equivalents excluded from the computation of diluted net loss per share	142,704,792	166,130,883
Common Stock Warrants [Member]
Total common stock equivalents excluded from the computation of diluted net loss per share	100,958,031	127,434,122
Convertible Notes [Member]
Total common stock equivalents excluded from the computation of diluted net loss per share	1,250,000
Common Stock Options [Member]
Total common stock equivalents excluded from the computation of diluted net loss per share	40,496,761	38,696,761