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Income Taxes (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2025
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
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