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
Mar. 31, 2026
Mar. 31, 2025
Stockholders' Equity    
Total stock-based compensation expense $ 22 $ 38
General and administrative    
Stockholders' Equity    
Total stock-based compensation expense $ 22 49
Research and development    
Stockholders' Equity    
Total stock-based compensation expense   $ (11)