Quarterly report pursuant to Section 13 or 15(d)

Stock Warrants - Summary of all warrant activity (Details)

v3.19.2
Stock Warrants - Summary of all warrant activity (Details) - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Stock-Based Compensation    
Number of Warrants, Beginning Balance 18,915,851 915,138
Number of Warrants, Granted 0 18,000,713
Number of Warrants, Exercised 0  
Number of Warrants, Forfeited 0  
Number of Warrants, Ending Balance 18,915,851 18,915,851
Weighted Average Exercise Price, Beginning Balance $ 3.85 $ 52.50
Weighted Average Exercise Price, Granted 0 1.38
Weighted Average Exercise Price, Exercised 0  
Weighted Average Exercise Price, Forfeited 0  
Weighted Average Exercise Price, Ending Balance $ 3.85 $ 3.85