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Prepaid Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Dec. 31, 2021
Prepaid Expenses      
Prepaid insurance $ 697 $ 628 $ 775
Other 562 775 1,508
Total prepaid expenses and other current assets $ 1,259 $ 1,403 $ 2,283