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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 22, 2022
Dec. 31, 2023
Dec. 31, 2022
Sep. 15, 2022
Dec. 31, 2021
Income Taxes [Line Items]          
U.S. federal corporate income tax rate (percent)   21.00%      
Net operating loss carryforwards   $ 34,000      
Operating loss carryforwards, subject to expiration   88,200      
Unrecognized tax benefits   344 $ 344   $ 0
Proceeds from sale of NOLs, gross $ 25,900        
Proceeds from sale of NOLs 2,200        
Loss on sale of NOLs 100        
CEND          
Income Taxes [Line Items]          
Fair market value of tax NOLs   $ 36,100      
Effective tax rate   2.54%      
Limitation on NOL carryforwards   $ 917      
New Jersey          
Income Taxes [Line Items]          
Proceeds from sale of NOLs, gross $ 2,300        
Federal          
Income Taxes [Line Items]          
Net operating loss carryforwards   43,700 33,700    
Federal | Research Tax Credit Carryforward          
Income Taxes [Line Items]          
Tax credit carryforward   500      
Federal | CEND          
Income Taxes [Line Items]          
Net operating loss carryforwards   3,600   $ 3,100  
Operating loss carryforwards, post acquisition   459      
State | Research Tax Credit Carryforward          
Income Taxes [Line Items]          
Tax credit carryforward   100      
State | CEND          
Income Taxes [Line Items]          
Net operating loss carryforwards       $ 4,300  
State | New Jersey          
Income Taxes [Line Items]          
Net operating loss carryforwards   19,400 35,500    
State | California          
Income Taxes [Line Items]          
Net operating loss carryforwards   9,200 9,200    
State | New York          
Income Taxes [Line Items]          
Net operating loss carryforwards   1,900 1,900    
Foreign Tax Authority | CEND          
Income Taxes [Line Items]          
Net operating loss carryforwards   $ 2,400 $ 1,800