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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