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Summary of Significant Accounting Policies - Basis of Presentation and Going Concern (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 08, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Accounting Policies [Abstract]        
Voting rights stock held 85.30%      
Cash and cash equivalents   $ 56,747   $ 75,585
Held-to-maturity securities   34,819   45,159
Accumulated deficit   (857,380)   $ (831,872)
Net cash used in operating activities   (28,289) $ (33,810)  
Net income (loss)   $ (25,508) $ (63,312)  
Proceeds from divestiture of businesses, net $ 153,285