Quarterly report [Sections 13 or 15(d)]

Stockholders' Equity (Stock-based Compensation Expense) (Details)

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Stockholders' Equity (Stock-based Compensation Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Stockholders' Equity        
Total stock-based compensation expense $ 23 $ 42 $ 106 $ (500)
General and administrative        
Stockholders' Equity        
Total stock-based compensation expense 22 52 116 150
Research and development        
Stockholders' Equity        
Total stock-based compensation expense $ 1 $ (10) $ (10) $ (650)