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Stock-Based Compensation, Stock-Based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Stock-Based Compensation Expense [Abstract]    
Stock-based compensation expense $ 2,935 $ 5,235
Research and Development [Member]    
Stock-Based Compensation Expense [Abstract]    
Stock-based compensation expense 1,249 1,597
General and Administrative [Member]    
Stock-Based Compensation Expense [Abstract]    
Stock-based compensation expense $ 1,686 $ 3,638