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Revision of Previously Issued Financial Statements - Revised prior period amounts on the consolidated financial statements to correct the misstatement (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Liabilities, Current [Abstract]                
Purchase warrant liability $ 5,265   $ 5,265     $ 4,874    
Total current liabilities 6,230   6,230     7,075    
Equity, Attributable to Parent [Abstract]                
Additional paid-in capital 456,995   456,995     456,908    
Accumulated deficit (444,164)   (444,164)     (441,651)    
Total stockholders' equity 10,325 $ 13,108 10,325 $ 13,108 $ 12,593 12,751 $ 13,124 $ 32,771
Statement of Comprehensive Income [Abstract]                
Change in fair value of purchase warrant liability (1,485) 376 (391) 15,334        
Other income (expense) 0 1 0 (1)        
Other income (expense), net (1,310) 631 153 16,534        
Loss before income taxes (2,301) (117) (2,513) (22,640)        
Net loss $ (2,301) $ (117) $ (2,513) $ (22,645)        
Net loss per share - basic $ (0.19) $ (0.01) $ (0.2) $ (1.86)        
Net loss per share - diluted $ (0.19) $ (0.01) $ (0.2) $ (1.86)        
Statement of Cash Flows [Abstract]                
Net income (loss) $ (2,301) $ (117) $ (2,513) $ (22,645)        
Change in fair value of warrant liability     391 (15,334)        
Statement of Stockholders' Equity [Abstract]                
Additional paid-in capital 456,995   456,995     456,908    
Accumulated deficit (444,164)   (444,164)     (441,651)    
Total stockholders' equity $ 10,325 $ 13,108 $ 10,325 $ 13,108 $ 12,593 $ 12,751 $ 13,124 $ 32,771