General form of registration statement for all companies including face-amount certificate companies

CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (Details)

v3.20.4
CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Jan. 14, 2019
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
director
$ / shares
shares
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
director
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Jun. 29, 2018
$ / shares
shares
Jan. 29, 2018
$ / shares
shares
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   156,000,000   156,000,000 156,000,000    
Common stock par value (in dollars per share)   $ 0.0001   $ 0.0001 $ 0.0001    
Dividend rate (as a percent)   8.00%   8.00%      
Dividend declared | $   $ 0   $ 0      
Firm-commitment underwritten initial public offering   $ 5.13          
Proceeds from common stock | $   $ 50,000          
Common Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   156,000,000   156,000,000      
Common stock par value (in dollars per share)   $ 0.0001   $ 0.0001      
Number of directors entitled to elect | director   2   2      
Firm-commitment underwritten initial public offering       $ 5.13      
Proceeds from common stock | $       $ 50,000      
Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Preferred stock, Shares authorized | shares   100,038,109   100,038,109 100,038,109    
Preferred stock par value (in dollars per share)   $ 0.0001   $ 0.0001 $ 0.0001    
Series A Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   26,189,545   26,189,545      
Preferred stock, Shares authorized | shares       26,189,545 26,189,545    
Number of directors entitled to elect | director   1   1      
Liquidation preference (in dollars per share)   $ 0.53372   $ 0.53372      
Conversion price (in dollars per share)   $ 0.53372   $ 0.53372      
Series B Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   23,675,035   23,675,035      
Preferred stock, Shares authorized | shares       23,675,035 23,675,035    
Number of directors entitled to elect | director   2   2      
Liquidation preference (in dollars per share)   $ 1.6013   $ 1.6013      
Conversion price (in dollars per share)   $ 1.6013   $ 1.6013      
Series C Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   13,152,896   13,152,896      
Preferred stock, Shares authorized | shares       13,152,896 13,152,896    
Number of directors entitled to elect | director   1   1      
Liquidation preference (in dollars per share)   $ 3.4213   $ 3.4213      
Conversion price (in dollars per share)   $ 3.4213   $ 3.4213      
Series D Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   21,075,193   21,075,193      
Preferred stock, Shares authorized | shares       21,075,193 21,075,193    
Preferred stock, shares issued | shares           11,674 4,086,111
Share price           $ 8.5656 $ 8.5656
Stock issuance cost | $         $ 200    
Liquidation preference (in dollars per share)   $ 8.5656   $ 8.5656      
Conversion price (in dollars per share)   $ 8.5656   $ 8.5656      
Series E Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   13,450,703   13,450,703      
Preferred stock, Shares authorized | shares       13,450,703 13,450,703    
Preferred stock, shares issued | shares 13,450,703            
Share price $ 10.0211            
Stock issuance cost | $ $ 100   $ 124 $ 124      
Number of directors entitled to elect | director   1   1      
Liquidation preference (in dollars per share)   $ 10.0211   $ 10.0211      
Conversion price (in dollars per share)   $ 10.0211   $ 10.0211      
Series E1 Preferred Stock              
Convertible Preferred Stock and Stockholders' Equity              
Common stock, shares authorized | shares   2,494,737   2,494,737      
Preferred stock, Shares authorized | shares       2,494,737 2,494,737    
Preferred stock, shares issued | shares 2,494,737            
Share price $ 10.0211            
Stock issuance cost | $ $ 20   $ 22 $ 22      
Liquidation preference (in dollars per share)   $ 10.0211   $ 10.0211      
Conversion price (in dollars per share)   $ 10.0211   $ 10.0211