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Stock-Based Compensation, Fair Value Assumptions Used (Details) - Stock Options [Member] - $ / shares
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Fair value assumptions used in estimating fair value of each option grant [Abstract]    
Expected stock price volatility 81.39% 85.39%
Risk-free interest rate 3.90% 3.09%
Expected life term 5 years 6 months 6 years 2 months 12 days
Expected dividends 0.00% 0.00%
Options granted, weighted average grant date fair value (in dollars per share) $ 6.96 $ 21.77