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Income Taxes (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Sep. 15, 2022
Operating Loss Carryforwards [Line Items]                  
Operating loss carryforwards subject to expiration             $ 88,200    
Net operating loss carryforwards           $ 34,000      
Unrecognized tax benefits             344 $ 344  
Proceeds from sale of NOLs, gross $ 10,700                
Proceeds from sale of NOLs 871                
Benefit from income taxes 962 $ 0 $ 0 $ (962) $ (798)        
Loss on sale of NOL $ 91                
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             57,900 43,700  
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             24,600 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             $ 2,300 $ 2,400