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 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Total stock-based compensation expense $ (619) $ 45 $ (542) $ 280
General and administrative        
Total stock-based compensation expense 51 153 98 262
Research and development        
Total stock-based compensation expense $ (670) $ (108) $ (640) $ 18