Annual report pursuant to Section 13 and 15(d)

Convertible Preferred Stock - Summary of Convertible Preferred Stock (Details)

v3.20.1
Convertible Preferred Stock - Summary of Convertible Preferred Stock (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2019
Oct. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Temporary Equity [Line Items]        
Beginning balance $ 43,921   $ 43,921  
Exchange, including deemed dividend 5,326      
Ending balance       $ 43,921
Series A Preferred        
Temporary Equity [Line Items]        
Beginning balance $ 12,575   $ 12,575  
Beginning balance, Shares 3,146,551   3,146,551  
Issuance   $ 12,744   $ 12,744
Issuance, shares       3,146,551
Issuance costs       $ (169)
Conversion to common stock     $ (12,575)  
Conversion to common stock, shares     (3,146,551)  
Ending balance       $ 12,575
Ending balance, Shares       3,146,551
Series A-1 Preferred        
Temporary Equity [Line Items]        
Beginning balance $ 24,994   $ 24,994  
Beginning balance, Shares 7,372,719   7,372,719  
Issuance on conversion of convertible notes       $ 9,558
Issuance on conversion of convertible notes, shares       2,819,267
Issuance on milestone closing of convertible notes       $ 15,436
Issuance on milestone closing of convertible notes, shares       4,553,452
Conversion to common stock     $ (24,994)  
Conversion to common stock, shares     (7,372,719)  
Ending balance       $ 24,994
Ending balance, Shares       7,372,719
Series A-2 Preferred        
Temporary Equity [Line Items]        
Beginning balance $ 6,352   $ 6,352  
Beginning balance, Shares 1,873,777   1,873,777  
Issuance on conversion of convertible notes       $ 6,352
Issuance on conversion of convertible notes, shares       1,873,777
Exchange, including deemed dividend $ 4,764   $ (4,764)  
Exchange, including deemed dividend, Shares (1,405,332)   (1,405,332)  
Conversion to common stock     $ (1,588)  
Conversion to common stock, shares     (468,445)  
Ending balance       $ 6,352
Ending balance, Shares       1,873,777
Series B Preferred Stock        
Temporary Equity [Line Items]        
Issuance     $ 50,000  
Issuance, shares 6,963,788   6,963,788  
Exchange, including deemed dividend $ 10,090   $ 10,090  
Exchange, including deemed dividend, Shares 1,405,332   1,405,332  
Issuance costs     $ (1,293)  
Conversion to common stock     $ (58,797)  
Conversion to common stock, shares     (8,369,120)  
Convertible Preferred Stock        
Temporary Equity [Line Items]        
Beginning balance $ 43,921   $ 43,921  
Beginning balance, Shares 12,393,047   12,393,047  
Issuance on conversion of convertible notes       $ 15,910
Issuance on conversion of convertible notes, shares       4,693,044
Issuance on milestone closing of convertible notes       $ 15,436
Issuance on milestone closing of convertible notes, shares       4,553,452
Issuance     $ 48,707 $ 12,575
Exchange, including deemed dividend     5,326  
Issuance costs     (1,293) (169)
Conversion to common stock     $ (97,954)  
Conversion to common stock, shares     (19,356,835)  
Ending balance       $ 43,921
Ending balance, Shares     0 12,393,047