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Changes in Stockholders' Equity - Summary of Reconciliation of Changes in Stockholders Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Equity        
Beginning balance $ 553,263 $ 122,158 $ 126,589 $ 109,588
Issuance of common stock upon exercise of stock options 366 15 $ 1,809 83
Issuance of common stock upon exercise of stock options (in shares)     1,993,596  
Issuance of common stock upon exercise of common stock warrants 3,876   $ 4,609  
Vesting of Promote Sponsor Vesting Shares     32,946  
Vesting of Sponsor Redemption-Based Vesting Shares 10,433   10,433  
Capitalization of offering costs to equity upon share issuance   (58) (888) (190)
Stock-based compensation 4,299 3,427 12,027 9,705
Foreign currency translation gain (loss) (73) 61 (102) (44)
Change in unrealized gain on available-for-sale securities 630 70 687 54
Net loss (200,968) (14,833) (198,003) (48,027)
Ending balance 371,826 $ 122,838 371,826 122,838
Common Stock Purchase Agreement        
Equity        
Proceeds from sale of common stock       $ 12,838
Proceeds from sale of common stock (in shares)   0   10,056,799
Private Placement        
Equity        
Proceeds from sale of common stock     35,000  
At The Market Offering Agreement        
Equity        
Proceeds from sale of common stock   $ 11,998 346,719 $ 38,831
Proceeds from sale of common stock (in shares)   11,294,746   30,718,121
Common Stock        
Equity        
Beginning balance $ 32 $ 17 $ 29 $ 14
Beginning balance (in shares) 323,762,000 179,597,000 283,547,000 147,066,000
Issuance of common stock upon exercise of stock options $ 1   $ 1  
Issuance of common stock upon exercise of stock options (in shares) 399,000 57,000 1,994,000 307,000
Issuance of common stock upon exercise of common stock warrants (in shares) 227,000   283,000  
Issuance of common stock upon release of restricted stock units ("RSUs") (in shares) 920,000 1,010,000 6,154,000 3,810,000
Ending balance $ 33 $ 19 $ 33 $ 19
Ending balance (in shares) 325,308,000 191,958,000 325,308,000 191,958,000
Common Stock | Common Stock Purchase Agreement        
Equity        
Proceeds from sale of common stock       $ 1
Proceeds from sale of common stock (in shares)       10,057,000
Common Stock | Private Placement        
Equity        
Proceeds from sale of common stock (in shares)     3,020,000  
Common Stock | At The Market Offering Agreement        
Equity        
Proceeds from sale of common stock   $ 2 $ 3 $ 4
Proceeds from sale of common stock (in shares)   11,294,000 30,310,000 30,718,000
Additional Paid-In Capital        
Equity        
Beginning balance $ 1,104,880 $ 508,971 $ 681,202 $ 463,089
Issuance of common stock upon exercise of stock options 365 15 1,808 83
Issuance of common stock upon exercise of common stock warrants 3,876   4,609  
Vesting of Promote Sponsor Vesting Shares     32,946  
Vesting of Sponsor Redemption-Based Vesting Shares 10,433   10,433  
Capitalization of offering costs to equity upon share issuance   (58) (888) (190)
Stock-based compensation 4,299 3,427 12,027 9,705
Ending balance 1,123,853 524,351 1,123,853 524,351
Additional Paid-In Capital | Common Stock Purchase Agreement        
Equity        
Proceeds from sale of common stock       12,837
Additional Paid-In Capital | Private Placement        
Equity        
Proceeds from sale of common stock     35,000  
Additional Paid-In Capital | At The Market Offering Agreement        
Equity        
Proceeds from sale of common stock   11,996 346,716 38,827
Accumulated Other Comprehensive Income        
Equity        
Beginning balance 133 123 105 244
Foreign currency translation gain (loss) (73) 61 (102) (44)
Change in unrealized gain on available-for-sale securities 630 70 687 54
Ending balance 690 254 690 254
Accumulated Deficit        
Equity        
Beginning balance (551,782) (386,953) (554,747) (353,759)
Net loss (200,968) (14,833) (198,003) (48,027)
Ending balance $ (752,750) $ (401,786) $ (752,750) $ (401,786)