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Accrued Liabilities - Accrued and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jun. 22, 2023
Dec. 31, 2022
Dec. 31, 2021
Payables and Accruals [Abstract]        
Accrued option cost payable to Paragon   $ 18,987    
Accrued professional and consulting fees $ 3,484 917 $ 946 $ 2,264
Fair value of assumed Parapyre Option Obligation (Note 3)   143    
Accrued liabilities   $ 20,047