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Notes Payable (Narrative) (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 11, 2023 | Mar. 04, 2022 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Oct. 27, 2017
Interest expense |  |  | $ 1 | $ 4 | $ 4 | $ 4,112 | $ 4,109 | $ 3,359 |
Amortization of debt discount |  |  |  |  | $ 0 | $ 118 | 118 | 470 |
Security deposit |  |  |  |  |  |  |  |  | $ 800
Long-term note payable |  |  |  |  |  |  | 0 | $ 27,436 |
Runway Debt Facility |  |  |  |  |  |  |  |  |
Payoff amount of debt facility | $ 30,400 |  |  |  |  |  |  |  |
Amount funded upon closing |  | $ 30,000 |  |  |  |  |  |  |
Long-term debt facility |  | 75,000 |  |  |  |  |  |  |
Amount available under facility |  | $ 45,000 |  |  |  |  |  |  |
Interest rate during period |  |  |  |  |  |  |  | 11.69% |
Interest expense |  |  |  |  |  |  | 1,300 | $ 2,700 |
Amortization of debt discount |  |  |  |  |  |  | $ 100 | 500 |
Note payable |  |  |  |  |  |  |  | 31,050 |
Discount on note payable |  |  |  |  |  |  |  | (3,614) |
Long-term note payable |  |  |  |  |  |  |  | $ 27,436 |
Runway Debt Facility | Minimum |  |  |  |  |  |  |  |  |
Variable interest rate floor (as a percent) |  | 9.25% |  |  |  |  |  |  |
Runway Debt Facility | Base Rate |  |  |  |  |  |  |  |  |
Variable interest rate floor (as a percent) |  | 8.75% |  |  |  |  |  |  |
Runway Debt Facility | Three month LIBOR |  |  |  |  |  |  |  |  |
Variable interest rate floor (as a percent) |  | 0.50% |  |  |  |  |  |  |

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