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Stockholders' Equity (Schedule of Fair Value of Employee Stock Options) (Details) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Dividend yield 0.00%    
Weighted average grant date fair value per share $ 5.93 $ 18.36 $ 4.14
Options To Purchase Common Stock [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected term in years     5 years
Expected volatility     70.70%
Risk-free interest rate     0.30%
Risk-free interest rate, minimum 0.41% 0.05%  
Risk-free interest rate, maximum 3.66% 1.10%  
Weighted average grant date fair value per share $ 5.93 $ 15.53 $ 7.20
Options To Purchase Common Stock [Member] | Minimum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected term in years 4 years 7 months 6 days 2 years 1 month 6 days  
Expected volatility 70.00% 67.00%  
Options To Purchase Common Stock [Member] | Maximum [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Expected term in years   4 years 7 months 6 days  
Expected volatility 76.00% 80.00%