Quarterly report pursuant to Section 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, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Total stock-based compensation expense $ 42 $ 100 $ (500) $ 380
General and administrative        
Total stock-based compensation expense 52 119 150 381
Research and development        
Total stock-based compensation expense $ (10) $ (19) $ (650) $ (1)