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Fair Value Measurements - Research and development license consideration (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Fair Value Measurements    
Aggregate fair value of the shares issued   $ 4,488
Summary of changes in the estimated fair value    
Beginning balance $ 990  
Remeasurement of the Note to settlement value upon the Closing of the Business Combination 606  
Ending balance $ 1,596  
Loss on the remeasurement of the research and development license consideration liability   $ 1,900
Research and development license consideration    
Fair Value Measurements    
Number of Class A ordinary shares agreed to issue upon the closing of the business combination 550,000  
Aggregate fair value of the shares issued $ 4,500  
Fair value per issued share $ 8.16  
Research and development license consideration | Shares issuable upon exercise of Z33 Series Seed Preferred Shares Put Right    
Fair Value Measurements    
Issuance of Z33 series seed preferred shares if the business combination was not consummated 4,702,867