Annual report pursuant to Section 13 and 15(d)

Net Income (Loss) Per Share Attributable to Common Stockholders - Outstanding Securities Considered Anti-Dilutive (Details)

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Net Income (Loss) Per Share Attributable to Common Stockholders - Outstanding Securities Considered Anti-Dilutive (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share    
Antidilutive securities excluded from computation of net loss per share (in shares) 622 7,189
Preferred stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share    
Antidilutive securities excluded from computation of net loss per share (in shares)   6,256
Common stock options    
Antidilutive Securities Excluded From Computation Of Earnings Per Share    
Antidilutive securities excluded from computation of net loss per share (in shares) 616 924
Warrants for common stock    
Antidilutive Securities Excluded From Computation Of Earnings Per Share    
Antidilutive securities excluded from computation of net loss per share (in shares) 6 9