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Stock-Based Compensation - Additional Information (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
shares
Jul. 31, 2019
USD ($)
item
shares
May 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Stock-Based Compensation          
Purchase of common stock       0.4697  
Percentage of aggregate number of shares       5.00%  
Common stock options available for future grants | shares 11,137,824     11,137,824  
Stock based compensation expense       $ 11,296 $ 35,972
Options outstanding | shares 6,414,611     6,414,611 7,428,682
Shares reserved for issuance | shares 11,137,824     11,137,824  
Vesting percentage       25.00%  
Maximum          
Stock-Based Compensation          
Vesting period       3 years  
Expiration period       10 years  
Cancellation Period after termination of employment       3 months  
General and administrative          
Stock-Based Compensation          
Stock based compensation expense       $ 4,145 $ 34,739
Executives | Redeemable Convertible Preferred Stock          
Stock-Based Compensation          
Temporary equity, shares issued discount to fair value | item   11      
Secondary market transaction          
Stock-Based Compensation          
Stock based compensation expense $ 1,616     1,616 33,232
Secondary market transaction | General and administrative          
Stock-Based Compensation          
Stock based compensation expense         33,232
Secondary market transaction | Redeemable Convertible Preferred Stock          
Stock-Based Compensation          
Temporary equity repurchased, shares | shares   901,940 7,559,047    
Temporary equity repurchased, value     $ 4,023    
Temporary equity repurchase price | $ / shares     $ 0.53    
Temporary equity, shares issued discount to fair value   $ 2,553      
Secondary market transaction | Employees          
Stock-Based Compensation          
Stock based compensation expense 927        
Secondary market transaction | Former Employees          
Stock-Based Compensation          
Stock based compensation expense $ 689        
Employee awards          
Stock-Based Compensation          
Stock based compensation expense       $ 9,680 $ 2,740
Options outstanding | shares 6,414,611     6,414,611