CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Sep. 30, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Preferred stock, par value (USD per share) $ 0.0001 $ 0.0001    
Preferred stock, shares authorized (shares) 1,000,000 1,000,000    
Common stock, par value (USD per share) $ 0.0001 $ 0.0001    
Common stock, shares authorized (shares) 620,000,000 620,000,000    
Series A Preferred Stock        
Preferred stock, shares issued (shares) 0 1 0 1
Preferred stock, shares outstanding (shares) 0 1 0 1
Class A        
Common stock, shares issued (shares) 290,104,427 280,650,341    
Common stock, shares outstanding (shares) 278,317,272 275,811,346    
Convertible Class C        
Common stock, shares issued (shares) 0 1,034,119    
Common stock, shares outstanding (shares) 0 1,034,119