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Consolidated Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Loans to Related Parties
Accumulated Deficit
Accumulated Comprehensive Income
IPO
IPO
Common Stock
IPO
Additional Paid-in Capital
Secondary Offering
Secondary Offering
Common Stock
Secondary Offering
Additional Paid-in Capital
Series G
Series H
Beginning balance (in shares) at Dec. 31, 2017 39,361,211                          
Beginning balance at Dec. 31, 2017 $ 148,194                          
Preferred Stock                            
Issuance of Series G preferred stock, net of issuance costs (in shares)                         125,684 2,075,216
Issuance of Series G preferred stock, net of issuance costs                         $ 1,347 $ 49,999
Ending balance (in shares) at Dec. 31, 2018 41,562,111                          
Ending balance at Dec. 31, 2018 $ 199,540                          
Beginning balance (in shares) at Dec. 31, 2017   5,724,506                        
Beginning balance at Dec. 31, 2017 (95,913) $ 1 $ 4,823 $ (951) $ (99,786) $ 0                
Common Stock                            
Net loss (29,886)       (29,886)                  
Issuance of common stock, net 0                          
Reclassification of warrant liability to additional paid-in capital upon closing of the initial public offering $ 0                          
Exercise of common stock options (in shares) 1,139,962 1,139,962                        
Exercise of common stock options $ 1,369   1,369                      
Share-based compensation for equity-classified awards 2,241   2,241                      
Re-purchase of common stock (in shares)   (48,909)                        
Re-purchase of common stock (514)   (514)                      
Grant of restricted stock (in shares)   135,791                        
Grant of restricted stock 2   2                      
Payoff of promissory notes receivable for restricted stock purchase 951     951                    
Foreign currency translation gain, net of tax 0                          
Ending balance (in shares) at Dec. 31, 2018   6,951,350                        
Ending balance at Dec. 31, 2018 $ (121,750) $ 1 7,921 0 (129,672) 0                
Preferred Stock                            
Issuance of common stock upon conversion of convertible preferred stock (in shares) (41,562,111)                          
Issuance of common stock upon conversion of convertible preferred stock $ (199,540)                          
Ending balance (in shares) at Dec. 31, 2019 0                          
Ending balance at Dec. 31, 2019 $ 0                          
Common Stock                            
Net loss (12,443)       (12,443)                  
Issuance of common stock, net (in shares)   41,562,111           11,068,750     250,000      
Issuance of common stock, net 199,540 $ 4 199,536       $ 252,453 $ 1 $ 252,452 $ 37,394   $ 37,394    
Issuance of common stock upon exercise of common stock warrants (in shares)   214,875                        
Reclassification of warrant liability to additional paid-in capital upon closing of the initial public offering $ 14,421   14,421                      
Exercise of common stock options (in shares) 1,429,756 1,529,408                        
Exercise of common stock options $ 2,669   2,669                      
Share-based compensation for equity-classified awards 11,806   11,806                      
Foreign currency translation gain, net of tax 0                          
Ending balance (in shares) at Dec. 31, 2019   61,576,494                        
Ending balance at Dec. 31, 2019 $ 384,090 $ 6 526,199 0 (142,115) 0                
Ending balance (in shares) at Dec. 31, 2020 0                          
Ending balance at Dec. 31, 2020 $ 0                          
Common Stock                            
Net loss (52,752)       (52,752)                  
Issuance of common stock under equity incentive plans, net (in shares)   1,243,857                        
Issuance of common stock under equity incentive plans, net 6,732   6,732                      
Issuance of common stock, net 0                          
Reclassification of warrant liability to additional paid-in capital upon closing of the initial public offering $ 0                          
Exercise of common stock options (in shares) 1,163,374                          
Share-based compensation for equity-classified awards $ 27,279   27,279                      
Foreign currency translation gain, net of tax 1,748         1,748                
Ending balance (in shares) at Dec. 31, 2020   62,820,351                        
Ending balance at Dec. 31, 2020 $ 367,097 $ 6 $ 560,210 $ 0 $ (194,867) $ 1,748