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Fair Value of Financial Assets and Liabilities - Changes in Embedded Derivative Liability (Details) - Revenue Interest Financing Agreement - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Sep. 30, 2022
Fair value of embedded derivative liability      
Fair value of embedded derivative liability, beginning balance   $ 1,340  
Change in fair value of embedded derivative $ 130 (150) $ (670)
Fair value of embedded derivative liability, ending balance $ 1,190 $ 1,190 $ 920