Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Fair Value Measurements (Details)

v3.20.2
Significant Accounting Policies - Fair Value Measurements (Details)
3 Months Ended
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2019
USD ($)
Liabilities              
Warrant liabilities $ 1,405,817           $ 496,343
change in fair value of the warrant liabilities              
Fair value as of September 30 1,120,533 $ 1,190,477 $ 496,343 $ 143,604 $ 104,902    
Warrants issued, assumed in connection with acquisition           $ 104,902  
Change in fair value 285,284 (69,944) 694,134 13,240 38,702    
Fair value at the end 1,405,817 $ 1,120,533 $ 1,190,477 $ 156,844 $ 143,604 $ 104,902  
Fair Value Measurements Level 3 [Member]              
Liabilities              
Warrant liabilities $ 1,405,817           $ 496,343
Common stock price volatility | Minimum              
Liabilities              
Warrants and Rights Outstanding, Measurement Input 87.9            
Common stock price volatility | Maximum              
Liabilities              
Warrants and Rights Outstanding, Measurement Input 89.8            
Risk-free interest rate              
Liabilities              
Warrants and Rights Outstanding, Measurement Input 0.16            
Remaining contractual term (years) | Maximum              
Liabilities              
Warrants and Rights Outstanding, Term 1 year 9 months 18 days