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Summary of Significant Accounting Policies - Basis of Presentation and Going Concern (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Apr. 10, 2025
Dec. 31, 2024
Dec. 31, 2023
Apr. 03, 2025
Feb. 08, 2023
Summary of Significant Accounting Policies [Line Items]          
Voting rights stock held         85.30%
Cash and cash equivalents   $ 43,499 $ 75,585    
Held-to-maturity securities   12,374      
Accumulated deficit   (969,603) (831,872)    
Cash used in operating activities   (89,060) (97,296)    
Net loss   (137,731) (134,098)    
Convertible notes payable   $ 51,112 $ 0    
Carbon Direct Capital Management LLC | Subsequent Event          
Summary of Significant Accounting Policies [Line Items]          
Sale of stock price (usd per share)       $ 0.02  
Convertible notes payable       $ 40,150  
Ownership percentage 14.60%