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Summary of Significant Accounting Policies - Additional Information (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
shares
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Segment
shares
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2018
Agreement
Summary Of Significant Accounting Policies [Line Items]                  
Number of operating agreements of joint venture parties | Agreement                 2
Redeemable non-controlling interest $ 1,734,000 $ 1,684,000 $ 1,734,000 $ 1,684,000 $ 1,704,000 $ 1,720,000 $ 1,692,000 $ 1,693,000  
Restricted cash 17,500,000   $ 17,500,000   17,500,000        
Number of reportable segment | Segment     1            
Number of operating segment | Segment     1            
Vesting period     4 years            
Provision for income taxes 0 0 $ 0 0          
Current income tax expense (benefit) 0 0 0 0          
Deferred income tax expense (benefit) $ 0 $ 0 $ 0 $ 0          
Restricted Stock Unit | Maximum                  
Summary Of Significant Accounting Policies [Line Items]                  
Vesting period     4 years            
Class A Common Stock                  
Summary Of Significant Accounting Policies [Line Items]                  
Number of shares purchased | shares 324,997   324,997            
Class A Common Stock | 2020 Equity Employee Stock Purchase Plan                  
Summary Of Significant Accounting Policies [Line Items]                  
Common stock reserved for future issuance | shares 11,000,000   11,000,000            
US Government Money Market Fund and Marketable Securities                  
Summary Of Significant Accounting Policies [Line Items]                  
Investment securities $ 168,500,000   $ 168,500,000   107,400,000        
U.S. Government and Agency Securities                  
Summary Of Significant Accounting Policies [Line Items]                  
Investment securities 534,900,000   $ 534,900,000   $ 610,500,000        
JVA                  
Summary Of Significant Accounting Policies [Line Items]                  
Percentage of joint venture holders voting interest     24.00%   21.50%        
Contribution in exchange for equity interests $ 1,700,000   $ 1,700,000            
Equity interests percentage 50.00%   50.00%            
Redeemable non-controlling interest $ 1,700,000   $ 1,700,000