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Income Taxes (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 04, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Sep. 15, 2022
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Operating loss carryforwards subject to expiration |  |  |  |  |  |  | $ 88,200 |
Unrecognized tax benefits |  |  |  |  |  | $ 344 | 344 |
Proceeds from sale of NOLs, gross | $ 8,900 |  |  |  |  |  |  |
Proceeds from sale of NOLs | 700 |  |  |  |  |  |  |
Benefit from income taxes | 800 | $ 0 | $ 0 | $ (798) | $ (2,330) |  |  |
Loss on sale of NOL | $ 100 |  |  |  |  |  |  |
CEND |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Fair value market of tax NOLs |  |  |  |  |  | $ 36,100 |  |
Effective income tax rate reconciliation |  |  |  |  |  | 2.54% |  |
NOL annual limitation |  |  |  |  |  | $ 917 |  |
Federal |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards, prior to write down |  |  |  |  |  | 33,700 | 43,700 |
Net operating loss carryforwards |  |  |  |  |  | 34,000 |  |
Federal | Research Tax Credit Carryforward |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Tax credit carryforward |  |  |  |  |  |  | 500 |
Federal | CEND |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  |  |  |  | 3,600 |  | $ 3,100
Operating loss carryforwards, post acquisition |  |  |  |  |  | 459 |  |
State | Research Tax Credit Carryforward |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Tax credit carryforward |  |  |  |  |  |  | 100 |
State | CEND |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  |  |  |  |  |  | $ 4,300
State | New Jersey |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  |  |  |  | 35,500 | 19,400 |
State | California |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  |  |  |  | 9,200 | 9,200 |
State | New York |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  |  |  |  | 1,900 | 1,900 |
Foreign Tax Authority | CEND |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carryforwards |  |  |  |  |  | $ 1,800 | $ 2,400 |

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