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Stockholders' Equity - Additional Information (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 26 Months Ended
Jun. 30, 2022
USD ($)
class
plan
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Apr. 30, 2021
shares
Feb. 28, 2021
shares
Jun. 30, 2020
shares
Nov. 30, 2019
shares
Sep. 30, 2019
Jun. 30, 2022
USD ($)
class
plan
$ / shares
shares
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
class
plan
$ / shares
shares
Jun. 30, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of common stock classes | class 2             2   2      
Number of equity incentive plan | plan 2             2   2      
Stock issuable upon the exercise of options outstanding (in shares) 19,596,828 21,372,561           19,596,828   19,596,828   21,372,561 21,372,561
Options granted (in shares)                   0 0    
Proceeds from exercise of stock options | $                   $ 6,451 $ 6,162    
Intrinsic value of options exercised | $                   217,000 229,600    
Aggregate fair value of options vested | $                   12,700 14,500    
Share-based payment arrangement, expense | $               $ 82,399 $ 34,515 149,283 63,376    
Amounts withheld on behalf of employees for a future purchase | $                   0 $ 245    
Employee stock options                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Total compensation cost related to unvested awards not yet recognized | $ $ 20,000 $ 31,600           $ 20,000   $ 20,000   $ 31,600 $ 31,600
Weighted average period over compensation cost related to unvested employee awards                   10 months 24 days   1 year 3 months 18 days  
Early exercise of common stock (in shares) 0 31,500           0   0   31,500 31,500
Unvested restricted stock in connection with acquisition                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Common stock granted (in shares) 191,809 98,593 245,761 117,538 96,210 244,445              
Service based vesting period                         4 years
Restricted Stock Units, Restricted Stock Awards and Performance Stock Units                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Weighted average period over compensation cost related to unvested employee awards                   2 years 10 months 24 days   3 years 1 month 6 days  
Common stock granted (in shares)                   3,119,713      
Total compensation cost related to unvested awards not yet recognized | $ $ 976,800 $ 773,600           $ 976,800   $ 976,800   $ 773,600 $ 773,600
Employee Stock Purchase Plan                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based payment arrangement, expiration period             27 months            
Percentage of purchase the shares at a price per share             85.00%            
Share-based payment arrangement, expense | $               $ 2,500   4,700      
Amounts withheld on behalf of employees for a future purchase | $                   $ 4,700      
Class A Common Stock                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of voting rights entitled to stockholders per share (in dollars per share) | $ / shares $ 1             $ 1   $ 1      
Common stock, authorized (in shares) 2,000,000,000 2,000,000,000           2,000,000,000   2,000,000,000   2,000,000,000 2,000,000,000
Common stock, par value (in dollars per share) | $ / shares $ 0.00001 $ 0.00001           $ 0.00001   $ 0.00001   $ 0.00001 $ 0.00001
Common stock, issued (in shares) 290,783,440 263,339,585           290,783,440   290,783,440   263,339,585 263,339,585
Common stock, outstanding (in shares) 290,783,440 263,339,585           290,783,440   290,783,440   263,339,585 263,339,585
Stock issuable upon the exercise of options outstanding (in shares) 29,266 31,671           29,266   29,266   31,671 31,671
Class A Common Stock | 2019 Equity Incentive Plan                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of shares available for grant (in shares) 67,352,167             67,352,167   67,352,167      
Class A Common Stock | Employee Stock Purchase Plan                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of shares available for grant (in shares) 14,976,951             14,976,951   14,976,951      
Issuance of common stock under the Employee Stock Purchase Plan (in shares)               146,515          
Class B Common Stock                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Number of voting rights entitled to stockholders per share (in dollars per share) | $ / shares $ 10             $ 10   $ 10      
Common stock, number of shares converted (in shares)               6,284,309   24,393,510      
Common stock, authorized (in shares) 310,000,000 310,000,000           310,000,000   310,000,000   310,000,000 310,000,000
Common stock, par value (in dollars per share) | $ / shares $ 0.00001 $ 0.00001           $ 0.00001   $ 0.00001   $ 0.00001 $ 0.00001
Common stock, issued (in shares) 25,632,342 50,025,852           25,632,342   25,632,342   50,025,852 50,025,852
Common stock, outstanding (in shares) 25,632,342 50,025,852           25,632,342   25,632,342   50,025,852 50,025,852
Stock issuable upon the exercise of options outstanding (in shares) 19,567,562 21,340,890           19,567,562   19,567,562   21,340,890 21,340,890