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Fair Value Measurements - Convertible Notes at Fair Value (Details)
$ in Millions
7 Months Ended 12 Months Ended
Jul. 21, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2023
Fair Value Measurements      
Increase decrease in fair value of convertible notes $ 19.4 $ 4.4  
Principal amount outstanding under the convertible notes   111.0  
Estimated fair value of convertible notes   $ 131.3  
Convertible notes, measurement input, extensible enumeration     Discount rate
Minimum | Discount rate | Predecessor period, July 1, 2023, to July 21, 2023      
Fair Value Measurements      
Convertible notes, measurement input 0.15    
Minimum | Discount rate | Predecessor period, January 1, 2023, to July 21, 2023      
Fair Value Measurements      
Convertible notes, measurement input 0.15    
Maximum | Discount rate | Predecessor period, July 1, 2023, to July 21, 2023      
Fair Value Measurements      
Convertible notes, measurement input 0.40    
Maximum | Discount rate | Predecessor period, January 1, 2023, to July 21, 2023      
Fair Value Measurements      
Convertible notes, measurement input 0.45