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Liquidity and Capital Resources (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Net loss $ 614,928 $ 78,782
Net cash used in operating activities 76,760 41,582
Accumulated deficit 993,258 378,330
Cash and cash equivalents and short-term investments 186,242  
Promissory notes payable to related parties $ 100,000 $ 494,540