Fair Value Measurements - Research and development license consideration (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Fair Value Measurements
Aggregate fair value of the shares issued		$ 4,488
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