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Fair Value of Financial Instruments - Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Notes and Warrants Offering Derivative    
Measurement at beginning of period $ (217) $ 1,575
Change in fair value (157) (1,448)
Derecognition of debt (14) (81)
Measurement at end of period 46 46
Total    
Measurement at beginning of period 1,411 4,892
Change in fair value (73) (3,487)
Derecognition of debt (14) (81)
Measurement at end of period 1,324 1,324
Warrants    
Warrants    
Measurement at beginning of period 722 2,052
Change in fair value 20 (1,310)
Measurement at end of period 742 742
Additional Warrants    
Warrants    
Measurement at beginning of period 472 1,265
Change in fair value 64 (729)
Measurement at end of period $ 536 $ 536