Quarterly report pursuant to Section 13 or 15(d)

Warrants - Assumptions Used and Summary of Warrant Liability (Details)

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Warrants - Assumptions Used and Summary of Warrant Liability (Details) - Liability Classified Warrants - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Weighted Average Remaining Contractual Life (Years)    
Granted 5 years 1 month 6 days  
Warrant    
Number of Shares Under Warrant    
Balance at beginning of period (in shares) 10,256,193  
Granted (in shares) 6,150,000  
Exercised (in shares) (4,500)  
Expired (in shares) 0  
Balance at end of period (in shares) 16,401,693 10,256,193
Number of share under warrant, vested and exercisable at end of period (in shares) 10,251,693  
Range of Warrant Exercise Price per Share/Weighted Average Exercise Price    
Balance at beginning of period (in dollars per share) $ 1.89  
Granted (in dollars per share) 1.05  
Exercised (in dollars per share) 1.10  
Expired (in dollars per share) 0  
Balance at end of period (in dollars per share) 1.58 $ 1.89
Range of warrant price per share, vested and exercisable at end of period, weighted average exercise price (in dollars per share) $ 1.89  
Weighted Average Remaining Contractual Life (Years)    
Weighted Average Remaining Contractual Life (Years) 4 years 1 month 6 days 4 years
Weighted average remaining contractual life, vested and exercisable at end of period 3 years 6 months  
Warrant | Minimum    
Range of Warrant Exercise Price per Share/Weighted Average Exercise Price    
Balance at beginning of period (in dollars per share) $ 1.10  
Granted (in dollars per share) 1.05  
Exercised (in dollars per share) 1.10  
Expired (in dollars per share) 0  
Balance at end of period (in dollars per share) 1.05 $ 1.10
Range of warrant price per share, vested and exercisable at end of period, weighted average exercise price (in dollars per share) 1.10  
Warrant | Maximum    
Range of Warrant Exercise Price per Share/Weighted Average Exercise Price    
Balance at beginning of period (in dollars per share) 2.80  
Granted (in dollars per share) 1.05  
Exercised (in dollars per share) 1.10  
Expired (in dollars per share) 0  
Balance at end of period (in dollars per share) 2.80 $ 2.80
Range of warrant price per share, vested and exercisable at end of period, weighted average exercise price (in dollars per share) $ 2.80