Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock-based compensation expense (Details)

v3.19.3
Stockholders' Equity - Stock-based compensation expense (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Feb. 01, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense $ 3,600,000 $ 433,438 $ 0 $ 6,283,811 $ 0  
Stock options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense   73,528 0 196,074 0  
Common Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense   359,910 0 764,807 0  
General and Administrative Expense [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense   433,438 0 6,283,811 0  
Contractors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense $ 1,700,000 $ 0 $ 0 $ 5,322,930 $ 0 $ 0