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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 369,244 $ 335,387
Marketable securities 799,065 384,518
Prepaid expenses and other current assets 11,366 6,583
Total current assets 1,179,675 726,488
Other assets 9,183 5,896
Total assets 1,188,858 732,384
Current liabilities:    
Accounts payable 15,934 9,274
Accrued expenses 35,198 22,549
Total current liabilities 51,132 31,823
Related party revenue share liability 16,600 0
Total liabilities 67,732 31,823
Commitments and contingencies (Note 9)
Stockholders' equity:    
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; no shares issued or outstanding
Additional paid-in capital 1,592,034 986,819
Accumulated other comprehensive income 1,373 31
Accumulated deficit (472,289) (286,296)
Total stockholders' equity 1,121,126 700,561
Total liabilities and stockholders' equity 1,188,858 732,384
Common Class A [Member]    
Stockholders' equity:    
Common stock 7 6
Common Class B [Member]    
Stockholders' equity:    
Common stock $ 1 $ 1