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Stockholders' Equity - Summary of Warrant Activity (Details) - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Warrants outstanding [Roll Forward]    
Outstanding, beginning of period (in shares) 65,685,269  
Warrants issued (in shares) 701,373,564  
Exercised (in shares) (7,898,853)  
Exchanged (in shares) (57,786,387)  
Outstanding, end of period (in shares) 701,373,593 65,685,269
Warrants, Weighted Average Exercise Price [Roll Forward]    
Outstanding, beginning of period (in dollars per share) $ 0.22  
Issued (in dollars per share) 0.06  
Exchanged (in dollars per share) 0.24  
Exercised (in dollars per share) 0.01  
Outstanding, end of period (in dollars per share) $ 0.06 $ 0.22
Weighted average remaining life 5 years 18 days 5 years 9 months
Minimum [Member]    
Warrants, Exercise Price per Share [Roll Forward]    
Outstanding, (in dollars per share) $ 0.01 $ 0.01
Maximum [Member]    
Warrants, Exercise Price per Share [Roll Forward]    
Outstanding, (in dollars per share) $ 0.06 $ 1.00